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Artikel ; Online: Search for Daily Modulation of MeV Dark Matter Signals with DAMIC-M.

Arnquist, I / Avalos, N / Baxter, D / Bertou, X / Castelló-Mor, N / Chavarria, A E / Cuevas-Zepeda, J / Dastgheibi-Fard, A / De Dominicis, C / Deligny, O / Duarte-Campderros, J / Estrada, E / Gadola, N / Gaïor, R / Hossbach, T / Iddir, L / Kavanagh, B J / Kilminster, B / Lantero-Barreda, A /

Lawson, I / Lee, S / Letessier-Selvon, A / Loaiza, P / Lopez-Virto, A / McGuire, K J / Mitra, P / Munagavalasa, S / Norcini, D / Paul, S / Piers, A / Privitera, P / Robmann, P / Scorza, S / Settimo, M / Smida, R / Traina, M / Vilar, R / Warot, G / Yajur, R / Zopounidis, J-P

Physical review letters

2024 Band 132, Heft 10, Seite(n) 101006

Abstract: Dark matter (DM) particles with sufficiently large cross sections may scatter as they travel through Earth's bulk. The corresponding changes in the DM flux give rise to a characteristic daily modulation signal in detectors sensitive to DM-electron ... ...

Abstract	Dark matter (DM) particles with sufficiently large cross sections may scatter as they travel through Earth's bulk. The corresponding changes in the DM flux give rise to a characteristic daily modulation signal in detectors sensitive to DM-electron interactions. Here, we report results obtained from the first underground operation of the DAMIC-M prototype detector searching for such a signal from DM with MeV-scale mass. A model-independent analysis finds no modulation in the rate of 1 e^{-} events with sidereal period, where a DM signal would appear. We then use these data to place exclusion limits on DM in the mass range [0.53,2.7] MeV/c^{2} interacting with electrons via a dark photon mediator. Taking advantage of the time-dependent signal we improve by ∼2 orders of magnitude on our previous limit obtained from the total rate of 1 e^{-} events, using the same dataset. This daily modulation search represents the current strongest limit on DM-electron scattering via ultralight mediators for DM masses around 1 MeV/c^{2}.
Sprache	Englisch
Erscheinungsdatum	2024-03-22
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.132.101006
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: First Constraints from DAMIC-M on Sub-GeV Dark-Matter Particles Interacting with Electrons.

Arnquist, I / Avalos, N / Baxter, D / Bertou, X / Castelló-Mor, N / Chavarria, A E / Cuevas-Zepeda, J / Gutiérrez, J Cortabitarte / Duarte-Campderros, J / Dastgheibi-Fard, A / Deligny, O / De Dominicis, C / Estrada, E / Gadola, N / Gaïor, R / Hossbach, T / Iddir, L / Khalil, L / Kilminster, B /

Lantero-Barreda, A / Lawson, I / Lee, S / Letessier-Selvon, A / Loaiza, P / Lopez-Virto, A / Matalon, A / Munagavalasa, S / McGuire, K J / Mitra, P / Norcini, D / Papadopoulos, G / Paul, S / Piers, A / Privitera, P / Ramanathan, K / Robmann, P / Settimo, M / Smida, R / Thomas, R / Traina, M / Vila, I / Vilar, R / Warot, G / Yajur, R / Zopounidis, J-P

Physical review letters

2023 Band 130, Heft 17, Seite(n) 171003

Abstract: We report constraints on sub-GeV dark matter particles interacting with electrons from the first underground operation of DAMIC-M detectors. The search is performed with an integrated exposure of 85.23 g days, and exploits the subelectron charge ... ...

Abstract	We report constraints on sub-GeV dark matter particles interacting with electrons from the first underground operation of DAMIC-M detectors. The search is performed with an integrated exposure of 85.23 g days, and exploits the subelectron charge resolution and low level of dark current of DAMIC-M charge-coupled devices (CCDs). Dark-matter-induced ionization signals above the detector dark current are searched for in CCD pixels with charge up to 7e^{-}. With this dataset we place limits on dark matter particles of mass between 0.53 and 1000 MeV/c^{2}, excluding unexplored regions of parameter space in the mass ranges [1.6,1000] MeV/c^{2} and [1.5,15.1] MeV/c^{2} for ultralight and heavy mediator interactions, respectively.
Sprache	Englisch
Erscheinungsdatum	2023-05-12
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.130.171003
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Results on Low-Mass Weakly Interacting Massive Particles from an 11 kg d Target Exposure of DAMIC at SNOLAB.

Aguilar-Arevalo, A / Amidei, D / Baxter, D / Cancelo, G / Vergara, B A Cervantes / Chavarria, A E / D'Olivo, J C / Estrada, J / Favela-Perez, F / Gaïor, R / Guardincerri, Y / Hoppe, E W / Hossbach, T W / Kilminster, B / Lawson, I / Lee, S J / Letessier-Selvon, A / Matalon, A / Mitra, P /

Overman, C T / Piers, A / Privitera, P / Ramanathan, K / Da Rocha, J / Sarkis, Y / Settimo, M / Smida, R / Thomas, R / Tiffenberg, J / Traina, M / Vilar, R / Virto, A L

Physical review letters

2021 Band 125, Heft 24, Seite(n) 241803

Abstract: We present constraints on the existence of weakly interacting massive particles (WIMPs) from an 11 kg d target exposure of the DAMIC experiment at the SNOLAB underground laboratory. The observed energy spectrum and spatial distribution of ionization ... ...

Abstract	We present constraints on the existence of weakly interacting massive particles (WIMPs) from an 11 kg d target exposure of the DAMIC experiment at the SNOLAB underground laboratory. The observed energy spectrum and spatial distribution of ionization events with electron-equivalent energies >200 eV_{ee} in the DAMIC CCDs are consistent with backgrounds from natural radioactivity. An excess of ionization events is observed above the analysis threshold of 50 eV_{ee}. While the origin of this low-energy excess requires further investigation, our data exclude spin-independent WIMP-nucleon scattering cross sections σ_{χ-n} as low as 3×10^{-41} cm^{2} for WIMPs with masses m_{χ} from 7 to 10 GeV c^{-2}. These results are the strongest constraints from a silicon target on the existence of WIMPs with m_{χ}<9 GeV c^{-2} and are directly relevant to any dark matter interpretation of the excess of nuclear-recoil events observed by the CDMS silicon experiment in 2013.
Sprache	Englisch
Erscheinungsdatum	2021-01-07
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.125.241803
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Constraints on Light Dark Matter Particles Interacting with Electrons from DAMIC at SNOLAB.

Aguilar-Arevalo, A / Amidei, D / Baxter, D / Cancelo, G / Cervantes Vergara, B A / Chavarria, A E / Darragh-Ford, E / de Mello Neto, J R T / D'Olivo, J C / Estrada, J / Gaïor, R / Guardincerri, Y / Hossbach, T W / Kilminster, B / Lawson, I / Lee, S J / Letessier-Selvon, A / Matalon, A / Mello, V B B /

Mitra, P / Molina, J / Paul, S / Piers, A / Privitera, P / Ramanathan, K / Da Rocha, J / Sarkis, Y / Settimo, M / Smida, R / Thomas, R / Tiffenberg, J / Torres Machado, D / Vilar, R / Virto, A L

Physical review letters

2019 Band 123, Heft 18, Seite(n) 181802

Abstract: We report direct-detection constraints on light dark matter particles interacting with electrons. The results are based on a method that exploits the extremely low levels of leakage current of the DAMIC detector at SNOLAB of 2-6×10^{-22} A cm^{-2}. We ... ...

Abstract	We report direct-detection constraints on light dark matter particles interacting with electrons. The results are based on a method that exploits the extremely low levels of leakage current of the DAMIC detector at SNOLAB of 2-6×10^{-22} A cm^{-2}. We evaluate the charge distribution of pixels that collect <10e^{-} for contributions beyond the leakage current that may be attributed to dark matter interactions. Constraints are placed on so-far unexplored parameter space for dark matter masses between 0.6 and 100 MeV c^{-2}. We also present new constraints on hidden-photon dark matter with masses in the range 1.2-30 eV c^{-2}.
Sprache	Englisch
Erscheinungsdatum	2019-11-25
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.123.181802
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: First Direct-Detection Constraints on eV-Scale Hidden-Photon Dark Matter with DAMIC at SNOLAB.

Aguilar-Arevalo, A / Amidei, D / Bertou, X / Butner, M / Cancelo, G / Castañeda Vázquez, A / Cervantes Vergara, B A / Chavarria, A E / Chavez, C R / de Mello Neto, J R T / D'Olivo, J C / Estrada, J / Fernandez Moroni, G / Gaïor, R / Guardincerri, Y / Hernández Torres, K P / Izraelevitch, F / Kavner, A / Kilminster, B /

Lawson, I / Letessier-Selvon, A / Liao, J / Matalon, A / Mello, V B B / Molina, J / Privitera, P / Ramanathan, K / Sarkis, Y / Schwarz, T / Settimo, M / Sofo Haro, M / Thomas, R / Tiffenberg, J / Tiouchichine, E / Torres Machado, D / Trillaud, F / You, X / Zhou, J

Physical review letters

2017 Band 118, Heft 14, Seite(n) 141803

Abstract: We present direct detection constraints on the absorption of hidden-photon dark matter with particle masses in the range 1.2-30 eV c^{-2} with the DAMIC experiment at SNOLAB. Under the assumption that the local dark matter is entirely constituted of ... ...

Abstract	We present direct detection constraints on the absorption of hidden-photon dark matter with particle masses in the range 1.2-30 eV c^{-2} with the DAMIC experiment at SNOLAB. Under the assumption that the local dark matter is entirely constituted of hidden photons, the sensitivity to the kinetic mixing parameter κ is competitive with constraints from solar emission, reaching a minimum value of 2.2×10^{-14} at 17 eV c^{-2}. These results are the most stringent direct detection constraints on hidden-photon dark matter in the galactic halo with masses 3-12 eV c^{-2} and the first demonstration of direct experimental sensitivity to ionization signals <12 eV from dark matter interactions.
Sprache	Englisch
Erscheinungsdatum	2017-04-07
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.118.141803
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: The Air Microwave Yield (AMY) experiment to measure the GHz emission from air shower plasmas

Smida R. / Salina G. / Settimo M. / Salamida F. / Fernandez G. Rodriguez / Rizi V. / Riegel M. / Petrera S. / Privitera P. / Perrone L. / Monasor M. / Martello D. / Iarlori M. / Luis P. Facal San / Engel R. / Creti P. / De Mitri I. / Di Giulio C. / Verzi V. /

Coluccia M.R. / Cataldi G. / Bohacova M. / Alvarez-Muñiz J. / Werner F. / Williams C.

EPJ Web of Conferences, Vol 53, p

2013 Band 08011

Abstract: The AMY experiment aims to measure the Microwave Bremsstrahlung Radiation (MBR) emitted by air-showers secondary electrons accelerating in collisions with neutral molecules of the atmosphere. The measurements are performed at the Beam Test Facility (BTF) ...

Abstract	The AMY experiment aims to measure the Microwave Bremsstrahlung Radiation (MBR) emitted by air-showers secondary electrons accelerating in collisions with neutral molecules of the atmosphere. The measurements are performed at the Beam Test Facility (BTF) of Frascati INFN National Laboratories and the final purpose is to characterize the process to be used in a next generation detectors of ultra-high energy cosmic rays (up to 1020eV). We describe the experimental set-up and the first test measurement performed in November 2011.
Schlagwörter	Physics ; QC1-999 ; Science ; Q ; DOAJ:Physics (General) ; DOAJ:Physics and Astronomy
Sprache	Englisch
Erscheinungsdatum	2013-06-01T00:00:00Z
Verlag	EDP Sciences
Dokumenttyp	Artikel ; Online
Datenquelle	BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

Volltext online

Volltext online

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Artikel: The novel Mechanical Ventilator Milano for the COVID-19 pandemic.

Abba, A / Accorsi, C / Agnes, P / Alessi, E / Amaudruz, P / Annovi, A / Desages, F Ardellier / Back, S / Badia, C / Bagger, J / Basile, V / Batignani, G / Bayo, A / Bell, B / Beschi, M / Biagini, D / Bianchi, G / Bicelli, S / Bishop, D /

Boccali, T / Bombarda, A / Bonfanti, S / Bonivento, W M / Bouchard, M / Breviario, M / Brice, S / Brown, R / Calvo-Mozota, J M / Camozzi, L / Camozzi, M / Capra, A / Caravati, M / Carlini, M / Ceccanti, A / Celano, B / Cela Ruiz, J M / Charette, C / Cogliati, G / Constable, M / Crippa, C / Croci, G / Cudmore, S / Dahl, C E / Dal Molin, A / Daley, M / Di Guardo, C / D'Avenio, G / Davignon, O / Del Tutto, M / De Ruiter, J / Devoto, A / Diaz Gomez Maqueo, P / Di Francesco, F / Dossi, M / Druszkiewicz, E / Duma, C / Elliott, E / Farina, D / Fernandes, C / Ferroni, F / Finocchiaro, G / Fiorillo, G / Ford, R / Foti, G / Fournier, R D / Franco, D / Fricbergs, C / Gabriele, F / Galbiati, C / Garcia Abia, P / Gargantini, A / Giacomelli, L / Giacomini, F / Giarratana, L S / Gillespie, S / Giorgi, D / Girma, T / Gobui, R / Goeldi, D / Golf, F / Gorel, P / Gorini, G / Gramellini, E / Grosso, G / Guescini, F / Guetre, E / Hackman, G / Hadden, T / Hawkins, W / Hayashi, K / Heavey, A / Hersak, G / Hessey, N / Hockin, G / Hudson, K / Ianni, A / Ienzi, C / Ippolito, V / James, C C / Jillings, C / Kendziora, C / Khan, S / Kim, E / King, M / King, S / Kittmer, A / Kochanek, I / Kowalkowski, J / Krücken, R / Kushoro, M / Kuula, S / Laclaustra, M / Leblond, G / Lee, L / Lennarz, A / Leyton, M / Li, X / Liimatainen, P / Lim, C / Lindner, T / Lomonaco, T / Lu, P / Lubna, R / Lukhanin, G A / Luzón, G / MacDonald, M / Magni, G / Maharaj, R / Manni, S / Mapelli, C / Margetak, P / Martin, L / Martin, S / Martínez, M / Massacret, N / McClurg, P / McDonald, A B / Meazzi, E / Migalla, R / Mohayai, T / Tosatti, L M / Monzani, G / Moretti, C / Morrison, B / Mountaniol, M / Muraro, A / Napoli, P / Nati, F / Natzke, C R / Noble, A J / Norrick, A / Olchanski, K / Ortiz de Solorzano, A / Padula, F / Pallavicini, M / Palumbo, I / Panontin, E / Papini, N / Parmeggiano, L / Parmeggiano, S / Patel, K / Patel, A / Paterno, M / Pellegrino, C / Pelliccione, P / Pesudo, V / Pocar, A / Pope, A / Pordes, S / Prelz, F / Putignano, O / Raaf, J L / Ratti, C / Razeti, M / Razeto, A / Reed, D / Refsgaard, J / Reilly, T / Renshaw, A / Retriere, F / Riccobene, E / Rigamonti, D / Rizzi, A / Rode, J / Romualdez, J / Russel, L / Sablone, D / Sala, S / Salomoni, D / Salvo, P / Sandoval, A / Sansoucy, E / Santorelli, R / Savarese, C / Scapparone, E / Schaubel, T / Scorza, S / Settimo, M / Shaw, B / Shawyer, S / Sher, A / Shi, A / Skensved, P / Slutsky, A / Smith, B / Smith, N J T / Stenzler, A / Straubel, C / Stringari, P / Suchenek, M / Sur, B / Tacchino, S / Takeuchi, L / Tardocchi, M / Tartaglia, R / Thomas, E / Trask, D / Tseng, J / Tseng, L / VanPagee, L / Vedia, V / Velghe, B / Viel, S / Visioli, A / Viviani, L / Vonica, D / Wada, M / Walter, D / Wang, H / Wang, M H L S / Westerdale, S / Wood, D / Yates, D / Yue, S / Zambrano, V

Physics of fluids (Woodbury, N.Y. : 1994)

2021 Band 33, Heft 3, Seite(n) 37122

Abstract: This paper presents the Mechanical Ventilator Milano (MVM), a novel intensive therapy mechanical ventilator designed for rapid, large-scale, low-cost production for the COVID-19 pandemic. Free of moving mechanical parts and requiring only a source of ... ...

Abstract	This paper presents the Mechanical Ventilator Milano (MVM), a novel intensive therapy mechanical ventilator designed for rapid, large-scale, low-cost production for the COVID-19 pandemic. Free of moving mechanical parts and requiring only a source of compressed oxygen and medical air to operate, the MVM is designed to support the long-term invasive ventilation often required for COVID-19 patients and operates in pressure-regulated ventilation modes, which minimize the risk of furthering lung trauma. The MVM was extensively tested against ISO standards in the laboratory using a breathing simulator, with good agreement between input and measured breathing parameters and performing correctly in response to fault conditions and stability tests. The MVM has obtained Emergency Use Authorization by U.S. Food and Drug Administration (FDA) for use in healthcare settings during the COVID-19 pandemic and Health Canada Medical Device Authorization for Importation or Sale, under Interim Order for Use in Relation to COVID-19. Following these certifications, mass production is ongoing and distribution is under way in several countries. The MVM was designed, tested, prepared for certification, and mass produced in the space of a few months by a unique collaboration of respiratory healthcare professionals and experimental physicists, working with industrial partners, and is an excellent ventilator candidate for this pandemic anywhere in the world.
Sprache	Englisch
Erscheinungsdatum	2021-03-23
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	1472743-2
ISSN	1089-7666 ; 1070-6631
ISSN (online)	1089-7666
ISSN	1070-6631
DOI	10.1063/5.0044445
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Search for γ-Ray Line Signals from Dark Matter Annihilations in the Inner Galactic Halo from 10 Years of Observations with H.E.S.S.

Abdallah, H / Abramowski, A / Aharonian, F / Ait Benkhali, F / Angüner, E O / Arakawa, M / Arrieta, M / Aubert, P / Backes, M / Balzer, A / Barnard, M / Becherini, Y / Becker Tjus, J / Berge, D / Bernhard, S / Bernlöhr, K / Blackwell, R / Böttcher, M / Boisson, C /

Bolmont, J / Bonnefoy, S / Bordas, P / Bregeon, J / Brun, F / Brun, P / Bryan, M / Büchele, M / Bulik, T / Capasso, M / Caroff, S / Carosi, A / Carr, J / Casanova, S / Cerruti, M / Chakraborty, N / Chaves, R C G / Chen, A / Chevalier, J / Colafrancesco, S / Condon, B / Conrad, J / Davids, I D / Decock, J / Deil, C / Devin, J / deWilt, P / Dirson, L / Djannati-Ataï, A / Domainko, W / Donath, A / Drury, L O'C / Dutson, K / Dyks, J / Edwards, T / Egberts, K / Eger, P / Emery, G / Ernenwein, J-P / Eschbach, S / Farnier, C / Fegan, S / Fernandes, M V / Fiasson, A / Fontaine, G / Förster, A / Funk, S / Füßling, M / Gabici, S / Gallant, Y A / Garrigoux, T / Gaté, F / Giavitto, G / Giebels, B / Glawion, D / Glicenstein, J F / Gottschall, D / Grondin, M-H / Hahn, J / Haupt, M / Hawkes, J / Heinzelmann, G / Henri, G / Hermann, G / Hinton, J A / Hofmann, W / Hoischen, C / Holch, T L / Holler, M / Horns, D / Ivascenko, A / Iwasaki, H / Jacholkowska, A / Jamrozy, M / Janiak, M / Jankowsky, D / Jankowsky, F / Jingo, M / Jouvin, L / Jung-Richardt, I / Kastendieck, M A / Katarzyński, K / Katsuragawa, M / Katz, U / Kerszberg, D / Khangulyan, D / Khélifi, B / King, J / Klepser, S / Klochkov, D / Kluźniak, W / Komin, Nu / Kosack, K / Krakau, S / Kraus, M / Krüger, P P / Laffon, H / Lamanna, G / Lau, J / Lees, J-P / Lefaucheur, J / Lemière, A / Lemoine-Goumard, M / Lenain, J-P / Leser, E / Liu, R / Lohse, T / Lorentz, M / López-Coto, R / Lypova, I / Malyshev, D / Marandon, V / Marcowith, A / Mariaud, C / Marx, R / Maurin, G / Maxted, N / Mayer, M / Meintjes, P J / Meyer, M / Mitchell, A M W / Moderski, R / Mohamed, M / Mohrmann, L / Morå, K / Moulin, E / Murach, T / Nakashima, S / de Naurois, M / Ndiyavala, H / Niederwanger, F / Niemiec, J / Oakes, L / O'Brien, P / Odaka, H / Ohm, S / Ostrowski, M / Oya, I / Padovani, M / Panter, M / Parsons, R D / Pekeur, N W / Pelletier, G / Perennes, C / Petrucci, P-O / Peyaud, B / Piel, Q / Pita, S / Poireau, V / Poon, H / Prokhorov, D / Prokoph, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Raab, S / Rauth, R / Reimer, A / Reimer, O / Renaud, M / de Los Reyes, R / Rieger, F / Rinchiuso, L / Romoli, C / Rowell, G / Rudak, B / Rulten, C B / Sahakian, V / Saito, S / Sanchez, D A / Santangelo, A / Sasaki, M / Schandri, M / Schlickeiser, R / Schüssler, F / Schulz, A / Schwanke, U / Schwemmer, S / Seglar-Arroyo, M / Settimo, M / Seyffert, A S / Shafi, N / Shilon, I / Shiningayamwe, K / Simoni, R / Sol, H / Spanier, F / Spir-Jacob, M / Stawarz, Ł / Steenkamp, R / Stegmann, C / Steppa, C / Sushch, I / Takahashi, T / Tavernet, J-P / Tavernier, T / Taylor, A M / Terrier, R / Tibaldo, L / Tiziani, D / Tluczykont, M / Trichard, C / Tsirou, M / Tsuji, N / Tuffs, R / Uchiyama, Y / van der Walt, J / van Eldik, C / van Rensburg, C / van Soelen, B / Vasileiadis, G / Veh, J / Venter, C / Viana, A / Vincent, P / Vink, J / Voisin, F / Völk, H J / Vuillaume, T / Wadiasingh, Z / Wagner, S J / Wagner, P / Wagner, R M / White, R / Wierzcholska, A / Willmann, P / Wörnlein, A / Wouters, D / Yang, R / Zaborov, D / Zacharias, M / Zanin, R / Zdziarski, A A / Zech, A / Zefi, F / Ziegler, A / Zorn, J / Żywucka, N

Physical review letters

2018 Band 120, Heft 20, Seite(n) 201101

Abstract: Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy γ rays. The central region of the Milky Way halo is one of the most promising targets given its large amount of DM and proximity to Earth. ...

Abstract	Spectral lines are among the most powerful signatures for dark matter (DM) annihilation searches in very-high-energy γ rays. The central region of the Milky Way halo is one of the most promising targets given its large amount of DM and proximity to Earth. We report on a search for a monoenergetic spectral line from self-annihilations of DM particles in the energy range from 300 GeV to 70 TeV using a two-dimensional maximum likelihood method taking advantage of both the spectral and spatial features of the signal versus background. The analysis makes use of Galactic center observations accumulated over ten years (2004-2014) with the H.E.S.S. array of ground-based Cherenkov telescopes. No significant γ-ray excess above the background is found. We derive upper limits on the annihilation cross section ⟨σv⟩ for monoenergetic DM lines at the level of 4×10^{-28} cm^{3} s^{-1} at 1 TeV, assuming an Einasto DM profile for the Milky Way halo. For a DM mass of 1 TeV, they improve over the previous ones by a factor of 6. The present constraints are the strongest obtained so far for DM particles in the mass range 300 GeV-70 TeV. Ground-based γ-ray observations have reached sufficient sensitivity to explore relevant velocity-averaged cross sections for DM annihilation into two γ-ray photons at the level expected from the thermal relic density for TeV DM particles.
Sprache	Englisch
Erscheinungsdatum	2018-05-18
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.120.201101
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: H.E.S.S. Limits on Linelike Dark Matter Signatures in the 100 GeV to 2 TeV Energy Range Close to the Galactic Center.

Abdalla, H / Abramowski, A / Aharonian, F / Ait Benkhali, F / Akhperjanian, A G / Andersson, T / Angüner, E O / Arrieta, M / Aubert, P / Backes, M / Balzer, A / Barnard, M / Becherini, Y / Becker Tjus, J / Berge, D / Bernhard, S / Bernlöhr, K / Birsin, E / Blackwell, R /

Böttcher, M / Boisson, C / Bolmont, J / Bordas, P / Bregeon, J / Brun, F / Brun, P / Bryan, M / Bulik, T / Capasso, M / Carr, J / Casanova, S / Chakraborty, N / Chalme-Calvet, R / Chaves, R C G / Chen, A / Chevalier, J / Chrétien, M / Colafrancesco, S / Cologna, G / Condon, B / Conrad, J / Couturier, C / Cui, Y / Davids, I D / Degrange, B / Deil, C / Devin, J / deWilt, P / Djannati-Ataï, A / Domainko, W / Donath, A / Drury, L O'C / Dubus, G / Dutson, K / Dyks, J / Dyrda, M / Edwards, T / Egberts, K / Eger, P / Ernenwein, J-P / Eschbach, S / Farnier, C / Fegan, S / Fernandes, M V / Fiasson, A / Fontaine, G / Förster, A / Funk, S / Füßling, M / Gabici, S / Gajdus, M / Gallant, Y A / Garrigoux, T / Giavitto, G / Giebels, B / Glicenstein, J F / Gottschall, D / Goyal, A / Grondin, M-H / Grudzińska, M / Hadasch, D / Hahn, J / Hawkes, J / Heinzelmann, G / Henri, G / Hermann, G / Hervet, O / Hillert, A / Hinton, J A / Hofmann, W / Hoischen, C / Holler, M / Horns, D / Ivascenko, A / Jacholkowska, A / Jamrozy, M / Janiak, M / Jankowsky, D / Jankowsky, F / Jingo, M / Jogler, T / Jouvin, L / Jung-Richardt, I / Kastendieck, M A / Katarzyński, K / Katz, U / Kerszberg, D / Khélifi, B / Kieffer, M / King, J / Klepser, S / Klochkov, D / Kluźniak, W / Kolitzus, D / Komin, Nu / Kosack, K / Krakau, S / Kraus, M / Krayzel, F / Krüger, P P / Laffon, H / Lamanna, G / Lau, J / Lees, J-P / Lefaucheur, J / Lefranc, V / Lemière, A / Lemoine-Goumard, M / Lenain, J-P / Leser, E / Liu, R / Lohse, T / Lorentz, M / Lypova, I / Marandon, V / Marcowith, A / Mariaud, C / Marx, R / Maurin, G / Maxted, N / Mayer, M / Meintjes, P J / Meyer, M / Mitchell, A M W / Moderski, R / Mohamed, M / Morå, K / Moulin, E / Murach, T / de Naurois, M / Niederwanger, F / Niemiec, J / Oakes, L / O'Brien, P / Odaka, H / Ohm, S / Ostrowski, M / Öttl, S / Oya, I / Padovani, M / Panter, M / Parsons, R D / Paz Arribas, M / Pekeur, N W / Pelletier, G / Perennes, C / Petrucci, P-O / Peyaud, B / Pita, S / Poon, H / Prokhorov, D / Prokoph, H / Pühlhofer, G / Punch, M / Quirrenbach, A / Raab, S / Reimer, A / Reimer, O / Renaud, M / de Los Reyes, R / Rieger, F / Romoli, C / Rosier-Lees, S / Rowell, G / Rudak, B / Rulten, C B / Sahakian, V / Salek, D / Sanchez, D A / Santangelo, A / Sasaki, M / Schlickeiser, R / Schüssler, F / Schulz, A / Schwanke, U / Schwemmer, S / Settimo, M / Seyffert, A S / Shafi, N / Shilon, I / Simoni, R / Sol, H / Spanier, F / Spengler, G / Spies, F / Stawarz, Ł / Steenkamp, R / Stegmann, C / Stinzing, F / Stycz, K / Sushch, I / Tavernet, J-P / Tavernier, T / Taylor, A M / Terrier, R / Tibaldo, L / Tluczykont, M / Trichard, C / Tuffs, R / van der Walt, J / van Eldik, C / van Soelen, B / Vasileiadis, G / Veh, J / Venter, C / Viana, A / Vincent, P / Vink, J / Voisin, F / Völk, H J / Vuillaume, T / Wadiasingh, Z / Wagner, S J / Wagner, P / Wagner, R M / White, R / Wierzcholska, A / Willmann, P / Wörnlein, A / Wouters, D / Yang, R / Zabalza, V / Zaborov, D / Zacharias, M / Zdziarski, A A / Zech, A / Zefi, F / Ziegler, A / Żywucka, N

Physical review letters

2016 Band 117, Heft 15, Seite(n) 151302

Abstract: A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. ... ...

Abstract	A search for dark matter linelike signals iss performed in the vicinity of the Galactic Center by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likelihood analysis iss developed to improve the sensitivity to linelike signals. The upgraded analysis along with newer data extend the energy coverage of the previous measurement down to 100 GeV. The 18 h of data collected with the H.E.S.S. array allow one to rule out at 95% C.L. the presence of a 130 GeV line (at l=-1.5°, b=0° and for a dark matter profile centered at this location) previously reported in Fermi-LAT data. This new analysis overlaps significantly in energy with previous Fermi-LAT and H.E.S.S. Results: No significant excess associated with dark matter annihilations was found in the energy range of 100 GeV to 2 TeV and upper limits on the gamma-ray flux and the velocity weighted annihilation cross section are derived adopting an Einasto dark matter halo profile. Expected limits for present and future large statistics H.E.S.S. observations are also given.
Sprache	Englisch
Erscheinungsdatum	2016-10-07
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.117.151302
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory.

Aab, A / Abreu, P / Aglietta, M / Ahn, E J / Al Samarai, I / Albuquerque, I F M / Allekotte, I / Allen, J D / Allison, P / Almela, A / Alvarez Castillo, J / Alvarez-Muñiz, J / Ambrosio, M / Anastasi, G A / Anchordoqui, L / Andrada, B / Andringa, S / Aramo, C / Arqueros, F /

Arsene, N / Asorey, H / Assis, P / Aublin, J / Avila, G / Badescu, A M / Baus, C / Beatty, J J / Becker, K H / Bellido, J A / Berat, C / Bertaina, M E / Bertou, X / Biermann, P L / Billoir, P / Biteau, J / Blaess, S G / Blanco, A / Blazek, J / Bleve, C / Blümer, H / Boháčová, M / Boncioli, D / Bonifazi, C / Borodai, N / Botti, A M / Brack, J / Brancus, I / Bretz, T / Bridgeman, A / Briechle, F L / Buchholz, P / Bueno, A / Buitink, S / Buscemi, M / Caballero-Mora, K S / Caccianiga, B / Caccianiga, L / Cancio, A / Canfora, F / Caramete, L / Caruso, R / Castellina, A / Cataldi, G / Cazon, L / Cester, R / Chavez, A G / Chiavassa, A / Chinellato, J A / Chirinos Diaz, J C / Chudoba, J / Clay, R W / Colalillo, R / Coleman, A / Collica, L / Coluccia, M R / Conceição, R / Contreras, F / Cooper, M J / Coutu, S / Covault, C E / Cronin, J / Dallier, R / D'Amico, S / Daniel, B / Dasso, S / Daumiller, K / Dawson, B R / de Almeida, R M / de Jong, S J / De Mauro, G / de Mello Neto, J R T / De Mitri, I / de Oliveira, J / de Souza, V / Debatin, J / Del Peral, L / Deligny, O / Dhital, N / Di Giulio, C / Di Matteo, A / Díaz Castro, M L / Diogo, F / Dobrigkeit, C / D'Olivo, J C / Dorofeev, A / Dos Anjos, R C / Dova, M T / Dundovic, A / Ebr, J / Engel, R / Erdmann, M / Erfani, M / Escobar, C O / Espadanal, J / Etchegoyen, A / Falcke, H / Fang, K / Farrar, G R / Fauth, A C / Fazzini, N / Ferguson, A P / Fick, B / Figueira, J M / Filevich, A / Filipčič, A / Fratu, O / Freire, M M / Fujii, T / Fuster, A / Gallo, F / García, B / Garcia-Pinto, D / Gate, F / Gemmeke, H / Gherghel-Lascu, A / Ghia, P L / Giaccari, U / Giammarchi, M / Giller, M / Głas, D / Glaser, C / Glass, H / Golup, G / Gómez Berisso, M / Gómez Vitale, P F / González, N / Gookin, B / Gordon, J / Gorgi, A / Gorham, P / Gouffon, P / Griffith, N / Grillo, A F / Grubb, T D / Guarino, F / Guedes, G P / Hampel, M R / Hansen, P / Harari, D / Harrison, T A / Harton, J L / Hasankiadeh, Q / Haungs, A / Hebbeker, T / Heck, D / Heimann, P / Herve, A E / Hill, G C / Hojvat, C / Hollon, N / Holt, E / Homola, P / Hörandel, J R / Horvath, P / Hrabovský, M / Huege, T / Hulsman, J / Insolia, A / Isar, P G / Jandt, I / Jansen, S / Jarne, C / Johnsen, J A / Josebachuili, M / Kääpä, A / Kambeitz, O / Kampert, K H / Kasper, P / Katkov, I / Keilhauer, B / Kemp, E / Kieckhafer, R M / Klages, H O / Kleifges, M / Kleinfeller, J / Krause, R / Krohm, N / Kuempel, D / Kukec Mezek, G / Kunka, N / Kuotb Awad, A / LaHurd, D / Latronico, L / Lauscher, M / Lautridou, P / Lebrun, P / Legumina, R / Leigui de Oliveira, M A / Letessier-Selvon, A / Lhenry-Yvon, I / Link, K / Lopes, L / López, R / López Casado, A / Lucero, A / Malacari, M / Mallamaci, M / Mandat, D / Mantsch, P / Mariazzi, A G / Marin, V / Mariş, I C / Marsella, G / Martello, D / Martinez, H / Martínez Bravo, O / Masías Meza, J J / Mathes, H J / Mathys, S / Matthews, J / Matthews, J A J / Matthiae, G / Maurizio, D / Mayotte, E / Mazur, P O / Medina, C / Medina-Tanco, G / Mello, V B B / Melo, D / Menshikov, A / Messina, S / Micheletti, M I / Middendorf, L / Minaya, I A / Miramonti, L / Mitrica, B / Molina-Bueno, L / Mollerach, S / Montanet, F / Morello, C / Mostafá, M / Moura, C A / Müller, G / Muller, M A / Müller, S / Naranjo, I / Navas, S / Necesal, P / Nellen, L / Nelles, A / Neuser, J / Nguyen, P H / Niculescu-Oglinzanu, M / Niechciol, M / Niemietz, L / Niggemann, T / Nitz, D / Nosek, D / Novotny, V / Nožka, H / Núñez, L A / Ochilo, L / Oikonomou, F / Olinto, A / Pakk Selmi-Dei, D / Palatka, M / Pallotta, J / Papenbreer, P / Parente, G / Parra, A / Paul, T / Pech, M / Pedreira, F / Pękala, J / Pelayo, R / Peña-Rodriguez, J / Pepe, I M / Pereira, L A S / Perrone, L / Petermann, E / Peters, C / Petrera, S / Phuntsok, J / Piegaia, R / Pierog, T / Pieroni, P / Pimenta, M / Pirronello, V / Platino, M / Plum, M / Porowski, C / Prado, R R / Privitera, P / Prouza, M / Quel, E J / Querchfeld, S / Quinn, S / Rautenberg, J / Ravel, O / Ravignani, D / Revenu, B / Ridky, J / Risse, M / Ristori, P / Rizi, V / Rodrigues de Carvalho, W / Rodriguez Rojo, J / Rodríguez-Frías, M D / Rogozin, D / Rosado, J / Roth, M / Roulet, E / Rovero, A C / Saffi, S J / Saftoiu, A / Salazar, H / Saleh, A / Salesa Greus, F / Salina, G / Sanabria Gomez, J D / Sánchez, F / Sanchez-Lucas, P / Santos, E M / Santos, E / Sarazin, F / Sarkar, B / Sarmento, R / Sarmiento-Cano, C / Sato, R / Scarso, C / Schauer, M / Scherini, V / Schieler, H / Schmidt, D / Scholten, O / Schoorlemmer, H / Schovánek, P / Schröder, F G / Schulz, A / Schulz, J / Schumacher, J / Sciutto, S J / Segreto, A / Settimo, M / Shadkam, A / Shellard, R C / Sigl, G / Sima, O / Śmiałkowski, A / Šmída, R / Snow, G R / Sommers, P / Sonntag, S / Sorokin, J / Squartini, R / Stanca, D / Stanič, S / Stapleton, J / Stasielak, J / Strafella, F / Stutz, A / Suarez, F / Suarez Durán, M / Sudholz, T / Suomijärvi, T / Supanitsky, A D / Sutherland, M S / Swain, J / Szadkowski, Z / Taborda, O A / Tapia, A / Tepe, A / Theodoro, V M / Timmermans, C / Todero Peixoto, C J / Tomankova, L / Tomé, B / Tonachini, A / Torralba Elipe, G / Torres Machado, D / Travnicek, P / Trini, M / Ulrich, R / Unger, M / Urban, M / Valbuena-Delgado, A / Valdés Galicia, J F / Valiño, I / Valore, L / van Aar, G / van Bodegom, P / van den Berg, A M / van Vliet, A / Varela, E / Vargas Cárdenas, B / Varner, G / Vázquez, J R / Vázquez, R A / Veberič, D / Verzi, V / Vicha, J / Videla, M / Villaseñor, L / Vorobiov, S / Wahlberg, H / Wainberg, O / Walz, D / Watson, A A / Weber, M / Weindl, A / Wiencke, L / Wilczyński, H / Winchen, T / Wittkowski, D / Wundheiler, B / Wykes, S / Yang, L / Yapici, T / Yelos, D / Zas, E / Zavrtanik, D / Zavrtanik, M / Zepeda, A / Zimmermann, B / Ziolkowski, M / Zong, Z / Zuccarello, F

Physical review letters

2016 Band 117, Heft 19, Seite(n) 192001

Abstract: Ultrahigh energy cosmic ray air showers probe particle physics at energies beyond the reach of accelerators. Here we introduce a new method to test hadronic interaction models without relying on the absolute energy calibration, and apply it to events ... ...

Abstract	Ultrahigh energy cosmic ray air showers probe particle physics at energies beyond the reach of accelerators. Here we introduce a new method to test hadronic interaction models without relying on the absolute energy calibration, and apply it to events with primary energy 6-16 EeV (E_{CM}=110-170 TeV), whose longitudinal development and lateral distribution were simultaneously measured by the Pierre Auger Observatory. The average hadronic shower is 1.33±0.16 (1.61±0.21) times larger than predicted using the leading LHC-tuned models EPOS-LHC (QGSJetII-04), with a corresponding excess of muons.
Sprache	Englisch
Erscheinungsdatum	2016-11-04
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.117.192001
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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