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Artikel ; Online: Jet Tomography in Heavy-Ion Collisions with Deep Learning.

Du, Yi-Lun / Pablos, Daniel / Tywoniuk, Konrad

2022 Band 128, Heft 1, Seite(n) 12301

Abstract: Deep learning techniques have the power to identify the degree of modification of high energy jets traversing deconfined QCD matter on a jet-by-jet basis. Such knowledge allows us to study jets based on their initial, rather than final, energy. We show ... ...

Abstract	Deep learning techniques have the power to identify the degree of modification of high energy jets traversing deconfined QCD matter on a jet-by-jet basis. Such knowledge allows us to study jets based on their initial, rather than final, energy. We show how this new technique provides unique access to the genuine configuration profile of jets over the transverse plane of the nuclear collision, both with respect to their production point and their orientation. By effectively removing the selection biases induced by final-state interactions, one can analyze the potential azimuthal anisotropies of jet production associated to initial-state effects. Additionally, we demonstrate the capability of our new method to locate with precision the production point of a dijet pair in the nuclear overlap region, in what constitutes an important step forward toward the long term quest of using jets as tomographic probes of the quark-gluon plasma.
Sprache	Englisch
Erscheinungsdatum	2022-01-21
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.128.012301
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Cone-Size Dependence of Jet Suppression in Heavy-Ion Collisions.

Mehtar-Tani, Yacine / Pablos, Daniel / Tywoniuk, Konrad

Physical review letters

2022 Band 127, Heft 25, Seite(n) 252301

Abstract: The strong suppression of high-p_{T} jets in heavy-ion collisions is a result of elastic and inelastic energy loss suffered by the jet multiprong collection of color charges that are resolved by medium interactions. Hence, quenching effects depend on the ...

Abstract	The strong suppression of high-p_{T} jets in heavy-ion collisions is a result of elastic and inelastic energy loss suffered by the jet multiprong collection of color charges that are resolved by medium interactions. Hence, quenching effects depend on the fluctuations of the jet substructure that are probed by the cone-size dependence of the spectrum. In this Letter, we present the first complete, analytic calculation of the inclusive R-dependent jet spectrum in PbPb collisions at LHC energies, including resummation of energy loss effects from hard, vacuumlike emissions occurring in the medium and modeling of soft energy flow and recovery at the jet cone. Both the geometry of the collision and the local medium properties, such as the temperature and fluid velocity, are given by a hydrodynamic evolution of the medium, leaving only the coupling constant in the medium as a free parameter. The calculation yields a good description of the centrality and p_{T} dependence of jet suppression for R=0.4 together with a mild cone-size dependence, which is in agreement with recent experimental results. Gauging the theoretical uncertainties, we find that the largest sensitivity resides in the leading logarithmic approximation of the phase space of resolved splittings, which can be improved systematically, while nonperturbative modeling of the soft-gluon sector is of relatively minor importance up to large cone sizes.
Sprache	Englisch
Erscheinungsdatum	2022-01-14
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.127.252301
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Sphenochoanal polyps in children - a systematic review (1995‒2021).

Tywoniuk, Krystian / Haber, Karolina / Mierzwiński, Józef

Brazilian journal of otorhinolaryngology

2022

Abstract: Objectives: Nasal polyps that originate from the sphenoid sinus and reach the nasopharynx are called sphenochoanal polyps. Reports on sphenochoanal polyps in children have thus far been limited only to case reports. This review aims to describe and ... ...

Abstract	Objectives: Nasal polyps that originate from the sphenoid sinus and reach the nasopharynx are called sphenochoanal polyps. Reports on sphenochoanal polyps in children have thus far been limited only to case reports. This review aims to describe and summarize clinical presentation, diagnosis, management, surgical approaches to the sphenochoanal polyps with recurrence rate after surgery in pediatric patients reported in the literature. Methods: A systematic literature review was performed using PubMed, MEDLINE and Cochrane Library Databases for articles published prior to December 2021 to identify all studies reporting on pediatric patients with sphenochoanal polyps. Clinical presentation, management options, surgical approaches and outcomes of applied management were extracted from included studies. Results: 9 articles provided data on 11 eligible patients with an age range 3 years and 8 months-16 years. The commonest symptoms included: nasal obstruction, nasal discharge, and headache respectively. All patients were subjected to surgical treatment. No recurrences after the endoscopic sphenoidotomy were reported. Conclusion: Sphenochoanal polyps should be kept in mind in the differential diagnosis of unilateral nasal cavity or paranasal sinuses masses. Misdiagnosis can result in recurrences in patients with sphenochoanal polyp, who can be mistakenly diagnosed with antrochoanal polyp and underwent inadequate treatment not involving sphenoidotomy and exact identification of the site of implantation. The symptoms of sphenochoanal polyps are nonspecific.
Sprache	Englisch
Erscheinungsdatum	2022-03-21
Erscheinungsland	Brazil
Dokumenttyp	Journal Article ; Review
ZDB-ID	2428110-4
ISSN	1808-8686 ; 1808-8694
ISSN (online)	1808-8686
ISSN	1808-8694
DOI	10.1016/j.bjorl.2022.02.006
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Massless mode and positivity violation in hot QCD.

Su, Nan / Tywoniuk, Konrad

Physical review letters

2015 Band 114, Heft 16, Seite(n) 161601

Abstract: We calculate the quark self-energy at one-loop level at high temperature, taking into account contributions from both the (chromo)electric scale gT and the (chromo)magnetic scale g^{2}T. While reproducing standard massive excitations due to the electric ... ...

Abstract	We calculate the quark self-energy at one-loop level at high temperature, taking into account contributions from both the (chromo)electric scale gT and the (chromo)magnetic scale g^{2}T. While reproducing standard massive excitations due to the electric scale, we uncover a novel massless excitation ascribable to the magnetic scale. The residue of this massless excitation is nonpositive at all temperatures, which consequently gives rise to positivity violation in the quark spectral functions. This demonstrates the profound impact of confinement effects on thermal quark collective excitations, which manifest genuine long-range correlations in the system.
Sprache	Englisch
Erscheinungsdatum	2015-04-24
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.114.161601
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Antiangular ordering of gluon radiation in QCD media.

Mehtar-Tani, Yacine / Salgado, Carlos A / Tywoniuk, Konrad

Physical review letters

2011 Band 106, Heft 12, Seite(n) 122002

Abstract: We investigate angular and energy distributions of medium-induced gluon emission off a quark-antiquark antenna in the framework of perturbative QCD as an attempt toward understanding, from first principles, jet evolution inside the quark-gluon plasma. In- ...

Abstract	We investigate angular and energy distributions of medium-induced gluon emission off a quark-antiquark antenna in the framework of perturbative QCD as an attempt toward understanding, from first principles, jet evolution inside the quark-gluon plasma. In-medium color coherence between emitters, neglected in all previous calculations, leads to a novel mechanism of soft-gluon radiation. The structure of the corresponding spectrum, in contrast with known medium-induced radiation, i.e., off a single emitter, retains some properties of the vacuum case; in particular, it exhibits a soft divergence. However, as opposed to the vacuum, the collinear singularity is regulated by the pair opening angle, leading to a strict angular separation between vacuum and medium-induced radiation, denoted as antiangular ordering. We comment on the possible consequences of this new contribution for jet observables in heavy-ion collisions.
Sprache	Englisch
Erscheinungsdatum	2011-03-25
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.106.122002
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Midrapidity antiproton-to-proton ratio in pp collisons at sqrt[s]=0.9 and 7 TeV measured by the ALICE experiment.

Aamodt, K / Abel, N / Abeysekara, U / Abrahantes Quintana, A / Abramyan, A / Adamová, D / Aggarwal, M M / Aglieri Rinella, G / Agocs, A G / Aguilar Salazar, S / Ahammed, Z / Ahmad, A / Ahmad, N / Ahn, S U / Akimoto, R / Akindinov, A / Aleksandrov, D / Alessandro, B / Alfaro Molina, R /

Alici, A / Almaráz Aviña, E / Alme, J / Alt, T / Altini, V / Altinpinar, S / Andrei, C / Andronic, A / Anelli, G / Angelov, V / Anson, C / Anticić, T / Antinori, F / Antinori, S / Antipin, K / Antończyk, D / Antonioli, P / Anzo, A / Aphecetche, L / Appelshäuser, H / Arcelli, S / Arceo, R / Arend, A / Armesto, N / Arnaldi, R / Aronsson, T / Arsene, I C / Asryan, A / Augustinus, A / Averbeck, R / Awes, T C / Aystö, J / Azmi, M D / Bablok, S / Bach, M / Badalà, A / Baek, Y W / Bagnasco, S / Bailhache, R / Bala, R / Baldisseri, A / Baldit, A / Bán, J / Barbera, R / Barnaföldi, G G / Barnby, L S / Barret, V / Bartke, J / Barile, F / Basile, M / Basmanov, V / Bastid, N / Bathen, B / Batigne, G / Batyunya, B / Baumann, C / Bearden, I G / Becker, B / Belikov, I / Bellwied, R / Belmont-Moreno, E / Belogianni, A / Benhabib, L / Beole, S / Berceanu, I / Bercuci, A / Berdermann, E / Berdnikov, Y / Betev, L / Bhasin, A / Bhati, A K / Bianchi, L / Bianchi, N / Bianchin, C / Bielcík, J / Bielcíková, J / Bilandzic, A / Bimbot, L / Biolcati, E / Blanc, A / Blanco, F / Blau, D / Blume, C / Boccioli, M / Bock, N / Bogdanov, A / Bøggild, H / Bogolyubsky, M / Bohm, J / Boldizsár, L / Bombara, M / Bombonati, C / Bondila, M / Borel, H / Borisov, A / Bortolin, C / Bose, S / Bosisio, L / Bossú, F / Botje, M / Böttger, S / Bourdaud, G / Boyer, B / Braun, M / Braun-Munzinger, P / Bravina, L / Bregant, M / Breitner, T / Bruckner, G / Brun, R / Bruna, E / Bruno, G E / Budnikov, D / Buesching, H / Buncic, P / Busch, O / Buthelezi, Z / Caffarri, D / Cai, X / Caines, H / Calvo, E / Camacho, E / Camerini, P / Campbell, M / Canoa Roman, V / Capitani, G P / Cara Romeo, G / Carena, F / Carena, W / Carminati, F / Casanova Díaz, A / Caselle, M / Castillo Castellanos, J / Castillo Hernandez, J F / Catanescu, V / Cattaruzza, E / Cavicchioli, C / Cerello, P / Chambert, V / Chang, B / Chapeland, S / Charpy, A / Charvet, J L / Chattopadhyay, S / Cherney, M / Cheshkov, C / Cheynis, B / Chiavassa, E / Chibante Barroso, V / Chinellato, D D / Chochula, P / Choi, K / Chojnacki, M / Christakoglou, P / Christensen, C H / Christiansen, P / Chujo, T / Chuman, F / Cicalo, C / Cifarelli, L / Cindolo, F / Cleymans, J / Cobanoglu, O / Coffin, J-P / Coli, S / Colla, A / Conesa Balbastre, G / Conesa Del Valle, Z / Conner, E S / Constantin, P / Contin, G / Contreras, J G / Corrales Morales, Y / Cormier, T M / Cortese, P / Cortés Maldonado, I / Cosentino, M R / Costa, F / Cotallo, M E / Crescio, E / Crochet, P / Cuautle, E / Cunqueiro, L / Cussonneau, J / Dainese, A / Dalsgaard, H H / Danu, A / Das, I / Dash, A / Dash, S / de Barros, G O V / De Caro, A / de Cataldo, G / de Cuveland, J / De Falco, A / De Gaspari, M / de Groot, J / De Gruttola, D / De Marco, N / De Pasquale, S / De Remigis, R / de Rooij, R / de Vaux, G / Delagrange, H / Delgado, Y / Dellacasa, G / Deloff, A / Demanov, V / Dénes, E / Deppman, A / D'Erasmo, G / Derkach, D / Devaux, A / Di Bari, D / Di Giglio, C / Di Liberto, S / Di Mauro, A / Di Nezza, P / Dialinas, M / Díaz, L / Díaz, R / Dietel, T / Divià, R / Djuvsland, O / Dobretsov, V / Dobrin, A / Dobrowolski, T / Dönigus, B / Domínguez, I / Don, D M M / Dordic, O / Dubey, A K / Dubuisson, J / Ducroux, L / Dupieux, P / Dutta Majumdar, A K / Dutta Majumdar, M R / Elia, D / Emschermann, D / Enokizono, A / Espagnon, B / Estienne, M / Esumi, S / Evans, D / Evrard, S / Eyyubova, G / Fabjan, C W / Fabris, D / Faivre, J / Falchieri, D / Fantoni, A / Fasel, M / Fateev, O / Fearick, R / Fedunov, A / Fehlker, D / Fekete, V / Felea, D / Fenton-Olsen, B / Feofilov, G / Fernández Téllez, A / Ferreiro, E G / Ferretti, A / Ferretti, R / Figueredo, M A S / Filchagin, S / Fini, R / Fionda, F M / Fiore, E M / Floris, M / Fodor, Z / Foertsch, S / Foka, P / Fokin, S / Formenti, F / Fragiacomo, E / Fragkiadakis, M / Frankenfeld, U / Frolov, A / Fuchs, U / Furano, F / Furget, C / Fusco Girard, M / Gaardhøje, J J / Gadrat, S / Gagliardi, M / Gago, A / Gallio, M / Ganoti, P / Ganti, M S / Garabatos, C / García Trapaga, C / Gebelein, J / Gemme, R / Germain, M / Gheata, A / Gheata, M / Ghidini, B / Ghosh, P / Giraudo, G / Giubellino, P / Gladysz-Dziadus, E / Glasow, R / Glässel, P / Glenn, A / Gómez Jiménez, R / González Santos, H / González-Trueba, L H / González-Zamora, P / Gorbunov, S / Gorbunov, Y / Gotovac, S / Gottschlag, H / Grabski, V / Grajcarek, R / Grelli, A / Grigoras, A / Grigoras, C / Grigoriev, V / Grigoryan, A / Grigoryan, S / Grinyov, B / Grion, N / Gros, P / Grosse-Oetringhaus, J F / Grossiord, J-Y / Grosso, R / Guber, F / Guernane, R / Guerra, C / Guerzoni, B / Gulbrandsen, K / Gulkanyan, H / Gunji, T / Gupta, A / Gupta, R / Gustafsson, H-A / Gutbrod, H / Haaland, O / Hadjidakis, C / Haiduc, M / Hamagaki, H / Hamar, G / Hamblen, J / Han, B H / Harris, J W / Hartig, M / Harutyunyan, A / Hasch, D / Hasegan, D / Hatzifotiadou, D / Hayrapetyan, A / Heide, M / Heinz, M / Helstrup, H / Herghelegiu, A / Hernández, C / Herrera Corral, G / Herrmann, N / Hetland, K F / Hicks, B / Hiei, A / Hille, P T / Hippolyte, B / Horaguchi, T / Hori, Y / Hristov, P / Hrivnácová, I / Hu, S / Huang, M / Huber, S / Humanic, T J / Hutter, D / Hwang, D S / Ichou, R / Ilkaev, R / Ilkiv, I / Inaba, M / Innocenti, P G / Ippolitov, M / Irfan, M / Ivan, C / Ivanov, A / Ivanov, M / Ivanov, V / Iwasaki, T / Jachołkowski, A / Jacobs, P / Jancurová, L / Jangal, S / Janik, R / Jena, C / Jena, S / Jirden, L / Jones, G T / Jones, P G / Jovanović, P / Jung, H / Jung, W / Jusko, A / Kaidalov, A B / Kalcher, S / Kalinák, P / Kalisky, M / Kalliokoski, T / Kalweit, A / Kamal, A / Kamermans, R / Kanaki, K / Kang, E / Kang, J H / Kapitan, J / Kaplin, V / Kapusta, S / Karavichev, O / Karavicheva, T / Karpechev, E / Kazantsev, A / Kebschull, U / Keidel, R / Khan, M M / Khan, S A / Khanzadeev, A / Kharlov, Y / Kikola, D / Kileng, B / Kim, D J / Kim, D S / Kim, D W / Kim, H N / Kim, J / Kim, J H / Kim, J S / Kim, M / Kim, S H / Kim, S / Kim, Y / Kirsch, S / Kisel, I / Kiselev, S / Kisiel, A / Klay, J L / Klein, J / Klein-Bösing, C / Kliemant, M / Klovning, A / Kluge, A / Knichel, M L / Kniege, S / Koch, K / Kolevatov, R / Kolojvari, A / Kondratiev, V / Kondratyeva, N / Konevskih, A / Kornaś, E / Kour, R / Kowalski, M / Kox, S / Kozlov, K / Kral, J / Králik, I / Kramer, F / Kraus, I / Kravcáková, A / Krawutschke, T / Krivda, M / Krumbhorn, D / Krus, M / Kryshen, E / Krzewicki, M / Kucheriaev, Y / Kuhn, C / Kuijer, P G / Kumar, L / Kumar, N / Kupczak, R / Kurashvili, P / Kurepin, A / Kurepin, A N / Kuryakin, A / Kushpil, S / Kushpil, V / Kutouski, M / Kvaerno, H / Kweon, M J / Kwon, Y / La Rocca, P / Lackner, F / Ladrón de Guevara, P / Lafage, V / Lal, C / Lara, C / Larsen, D T / Laurenti, G / Lazzeroni, C / Le Bornec, Y / Le Bris, N / Lee, H / Lee, K S / Lee, S C / Lefèvre, F / Lenhardt, M / Leistam, L / Lehnert, J / Lenti, V / León, H / León Monzón, I / León Vargas, H / Lévai, P / Li, X / Li, Y / Lietava, R / Lindal, S / Lindenstruth, V / Lippmann, C / Lisa, M A / Liu, L / Loginov, V / Lohn, S / Lopez, X / López Noriega, M / López-Ramírez, R / López Torres, E / Løvhøiden, G / Lozea Feijo Soares, A / Lu, S / Lunardon, M / Luparello, G / Luquin, L / Lutz, J-R / Ma, K / Ma, R / Madagodahettige-Don, D M / Maevskaya, A / Mager, M / Mahapatra, D P / Maire, A / Makhlyueva, I / Mal'kevich, D / Malaev, M / Malagalage, K J / Maldonado Cervantes, I / Malek, M / Malkiewicz, T / Malzacher, P / Mamonov, A / Manceau, L / Mangotra, L / Manko, V / Manso, F / Manzari, V / Mao, Y / Mares, J / Margagliotti, G V / Margotti, A / Marín, A / Martashvili, I / Martinengo, P / Martínez Hernández, M I / Martínez Davalos, A / Martínez García, G / Maruyama, Y / Marzari Chiesa, A / Masciocchi, S / Masera, M / Masetti, M / Masoni, A / Massacrier, L / Mastromarco, M / Mastroserio, A / Matthews, Z L / Matyja, A / Mayani, D / Mazza, G / Mazzoni, M A / Meddi, F / Menchaca-Rocha, A / Mendez Lorenzo, P / Meoni, M / Mercado Pérez, J / Mereu, P / Miake, Y / Michalon, A / Miftakhov, N / Milano, L / Milosevic, J / Minafra, F / Mischke, A / Miśkowiec, D / Mitu, C / Mizoguchi, K / Mlynarz, J / Mohanty, B / Molnar, L / Mondal, M M / Montaño Zetina, L / Monteno, M / Montes, E / Morando, M / Moretto, S / Morsch, A / Moukhanova, T / Muccifora, V / Mudnic, E / Muhuri, S / Müller, H / Munhoz, M G / Munoz, J / Musa, L / Musso, A / Nandi, B K / Nania, R / Nappi, E / Navach, F / Navin, S / Nayak, T K / Nazarenko, S / Nazarov, G / Nedosekin, A / Nendaz, F / Newby, J / Nianine, A / Nicassio, M / Nielsen, B S / Nikolaev, S / Nikolic, V / Nikulin, S / Nikulin, V / Nilsen, B S / Nilsson, M S / Noferini, F / Nomokonov, P / Nooren, G / Novitzky, N / Nyatha, A / Nygaard, C / Nyiri, A / Nystrand, J / Ochirov, A / Odyniec, G / Oeschler, H / Oinonen, M / Okada, K / Okada, Y / Oldenburg, M / Oleniacz, J / Oppedisano, C / Orsini, F / Ortiz Velasquez, A / Ortona, G / Oskarsson, A / Osmic, F / Osterman, L / Ostrowski, P / Otterlund, I / Otwinowski, J / Ovrebekk, G / Oyama, K / Ozawa, K / Pachmayer, Y / Pachr, M / Padilla, F / Pagano, P / Paić, G / Painke, F / Pajares, C / Pal, S / Pal, S K / Palaha, A / Palmeri, A / Panse, R / Papikyan, V / Pappalardo, G S / Park, W J / Pastircák, B / Pastore, C / Paticchio, V / Pavlinov, A / Pawlak, T / Peitzmann, T / Pepato, A / Pereira, H / Peressounko, D / Pérez, C / Perini, D / Perrino, D / Peryt, W / Peschek, J / Pesci, A / Peskov, V / Pestov, Y / Peters, A J / Petrácek, V / Petridis, A / Petris, M / Petrov, P / Petrovici, M / Petta, C / Peyré, J / Piano, S / Piccotti, A / Pikna, M / Pillot, P / Pinazza, O / Pinsky, L / Pitz, N / Piuz, F / Platt, R / Płoskoń, M / Pluta, J / Pocheptsov, T / Pochybova, S / Podesta Lerma, P L M / Poggio, F / Poghosyan, M G / Polák, K / Polichtchouk, B / Polozov, P / Polyakov, V / Pommeresch, B / Pop, A / Posa, F / Pospísil, V / Potukuchi, B / Pouthas, J / Prasad, S K / Preghenella, R / Prino, F / Pruneau, C A / Pshenichnov, I / Puddu, G / Pujahari, P / Pulvirenti, A / Punin, A / Punin, V / Putis, M / Putschke, J / Quercigh, E / Rachevski, A / Rademakers, A / Radomski, S / Räihä, T S / Rak, J / Rakotozafindrabe, A / Ramello, L / Ramírez Reyes, A / Rammler, M / Raniwala, R / Raniwala, S / Räsänen, S S / Rashevskaya, I / Rath, S / Read, K F / Real, J S / Redlich, K / Renfordt, R / Reolon, A R / Reshetin, A / Rettig, F / Revol, J-P / Reygers, K / Ricaud, H / Riccati, L / Ricci, R A / Richter, M / Riedler, P / Riegler, W / Riggi, F / Rivetti, A / Rodriguez Cahuantzi, M / Røed, K / Röhrich, D / Román López, S / Romita, R / Ronchetti, F / Rosinský, P / Rosnet, P / Rossegger, S / Rossi, A / Roukoutakis, F / Rousseau, S / Roy, C / Roy, P / Rubio-Montero, A J / Rui, R / Rusanov, I / Russo, G / Ryabinkin, E / Rybicki, A / Sadovsky, S / Safarík, K / Sahoo, R / Saini, J / Saiz, P / Sakata, D / Salgado, C A / Salgueiro Domingues da Silva, R / Salur, S / Samanta, T / Sambyal, S / Samsonov, V / Sándor, L / Sandoval, A / Sano, M / Sano, S / Santo, R / Santoro, R / Sarkamo, J / Saturnini, P / 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Physical review letters

2010 Band 105, Heft 7, Seite(n) 72002

Abstract: The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at sqrt[s]=0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval ...

Abstract	The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at sqrt[s]=0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval 0.45<p_{t}<1.05 GeV/c and rapidity \|y\|<0.5. The ratio is measured to be R_{\|y\|<0.5}=0.957±0.006(stat)±0.014(syst) at 0.9 TeV and R_{\|y\|<0.5}=0.991±0.005(stat)±0.014(syst) at 7 TeV and it is independent of both rapidity and transverse momentum. The results are consistent with the conventional model of baryon-number transport and set stringent limits on any additional contributions to baryon-number transfer over very large rapidity intervals in pp collisions.<br />
Sprache	Englisch
Erscheinungsdatum	2010-08-13
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.105.072002
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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