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Article ; Online: Author Correction: Measurement of the neutron charge radius and the role of its constituents.

Atac, H / Constantinou, M / Meziani, Z-E / Paolone, M / Sparveris, N

2021 Volume 12, Issue 1, Page(s) 3290

Language	English
Publishing date	2021-05-27
Publishing country	England
Document type	Published Erratum
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-021-23842-1
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Article ; Online: Measurement of the neutron charge radius and the role of its constituents.

Atac, H / Constantinou, M / Meziani, Z-E / Paolone, M / Sparveris, N

Nature communications

2021 Volume 12, Issue 1, Page(s) 1759

Abstract: The neutron is a cornerstone in our depiction of the visible universe. Despite the neutron zero-net electric charge, the asymmetric distribution of the positively- (up) and negatively-charged (down) quarks, a result of the complex quark-gluon dynamics, ... ...

Abstract	The neutron is a cornerstone in our depiction of the visible universe. Despite the neutron zero-net electric charge, the asymmetric distribution of the positively- (up) and negatively-charged (down) quarks, a result of the complex quark-gluon dynamics, lead to a negative value for its squared charge radius, [Formula: see text]. The precise measurement of the neutron's charge radius thus emerges as an essential part of unraveling its structure. Here we report on a [Formula: see text] measurement, based on the extraction of the neutron electric form factor, [Formula: see text], at low four-momentum transfer squared (Q
Language	English
Publishing date	2021-03-19
Publishing country	England
Document type	Journal Article
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-021-22028-z
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Article ; Online: Determining the gluonic gravitational form factors of the proton.

Duran, B / Meziani, Z-E / Joosten, S / Jones, M K / Prasad, S / Peng, C / Armstrong, W / Atac, H / Chudakov, E / Bhatt, H / Bhetuwal, D / Boer, M / Camsonne, A / Chen, J-P / Dalton, M M / Deokar, N / Diefenthaler, M / Dunne, J / El Fassi, L /

Fuchey, E / Gao, H / Gaskell, D / Hansen, O / Hauenstein, F / Higinbotham, D / Jia, S / Karki, A / Keppel, C / King, P / Ko, H S / Li, X / Li, R / Mack, D / Malace, S / McCaughan, M / McClellan, R E / Michaels, R / Meekins, D / Paolone, Michael / Pentchev, L / Pooser, E / Puckett, A / Radloff, R / Rehfuss, M / Reimer, P E / Riordan, S / Sawatzky, B / Smith, A / Sparveris, N / Szumila-Vance, H / Wood, S / Xie, J / Ye, Z / Yero, C / Zhao, Z

Nature

2023 Volume 615, Issue 7954, Page(s) 813–816

Abstract: The proton is one of the main building blocks of all visible matter in the ... ...

Abstract	The proton is one of the main building blocks of all visible matter in the Universe
Language	English
Publishing date	2023-03-29
Publishing country	England
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, Non-U.S. Gov't
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-023-05730-4
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Zs.A 26: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
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Article ; Online: Measured proton electromagnetic structure deviates from theoretical predictions.

Li, R / Sparveris, N / Atac, H / Jones, M K / Paolone, M / Akbar, Z / Gayoso, C Ayerbe / Berdnikov, V / Biswas, D / Boer, M / Camsonne, A / Chen, J-P / Diefenthaler, M / Duran, B / Dutta, D / Gaskell, D / Hansen, O / Hauenstein, F / Heinrich, N /

Henry, W / Horn, T / Huber, G M / Jia, S / Joosten, S / Karki, A / Kay, S J D / Kumar, V / Li, X / Li, W B / Liyanage, A H / Malace, S / Markowitz, P / McCaughan, M / Meziani, Z-E / Mkrtchyan, H / Morean, C / Muhoza, M / Narayan, A / Pasquini, B / Rehfuss, M / Sawatzky, B / Smith, G R / Smith, A / Trotta, R / Yero, C / Zheng, X / Zhou, J

Nature

2022 Volume 611, Issue 7935, Page(s) 265–270

Abstract: The visible world is founded on the proton, the only composite building block of matter that is stable in nature. Consequently, understanding the formation of matter relies on explaining the dynamics and the properties of the proton's bound state. A ... ...

Abstract	The visible world is founded on the proton, the only composite building block of matter that is stable in nature. Consequently, understanding the formation of matter relies on explaining the dynamics and the properties of the proton's bound state. A fundamental property of the proton involves the response of the system to an external electromagnetic field. It is characterized by the electromagnetic polarizabilities<sup>1</sup> that describe how easily the charge and magnetization distributions inside the system are distorted by the electromagnetic field. Moreover, the generalized polarizabilities<sup>2</sup> map out the resulting deformation of the densities in a proton subject to an electromagnetic field. They disclose essential information about the underlying system dynamics and provide a key for decoding the proton structure in terms of the theory of the strong interaction that binds its elementary quark and gluon constituents. Of particular interest is a puzzle in the electric generalized polarizability of the proton that remains unresolved for two decades<sup>2</sup>. Here we report measurements of the proton's electromagnetic generalized polarizabilities at low four-momentum transfer squared. We show evidence of an anomaly to the behaviour of the proton's electric generalized polarizability that contradicts the predictions of nuclear theory and derive its signature in the spatial distribution of the induced polarization in the proton. The reported measurements suggest the presence of a new, not-yet-understood dynamical mechanism in the proton and present notable challenges to the nuclear theory.
Language	English
Publishing date	2022-10-19
Publishing country	England
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-022-05248-1
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Article ; Online: New Insight in the Q^{2} Dependence of Proton Generalized Polarizabilities.

Beričič, J / Correa, L / Benali, M / Achenbach, P / Ayerbe Gayoso, C / Bernauer, J C / Blomberg, A / Böhm, R / Bosnar, D / Debenjak, L / Denig, A / Distler, M O / Downie, E J / Esser, A / Fonvieille, H / Friščić, I / Kegel, S / Kohl, Y / Makek, M /

Merkel, H / Middleton, D G / Mihovilovič, M / Müller, U / Nungesser, L / Paolone, M / Pochodzalla, J / Sánchez Majos, S / Schlimme, B S / Schoth, M / Schulz, F / Sfienti, C / Širca, S / Sparveris, N / Štajner, S / Thiel, M / Tyukin, A / Weber, A / Weinriefer, M

Physical review letters

2019 Volume 123, Issue 19, Page(s) 192302

Abstract: Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer Q^{2}: 0.10, 0.20, and 0.45 GeV^{2}, at the Mainz Microtron. Fits performed using either the low-energy theorem or dispersion ... ...

Abstract	Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer Q^{2}: 0.10, 0.20, and 0.45 GeV^{2}, at the Mainz Microtron. Fits performed using either the low-energy theorem or dispersion relations allowed the extraction of the structure functions P_{LL}-P_{TT}/ε and P_{LT}, as well as the electric and magnetic generalized polarizabilities α_{E1}(Q^{2}) and β_{M1}(Q^{2}). These new results show a smooth and rapid falloff of α_{E1}(Q^{2}), in contrast to previous measurements at Q^{2}=0.33 GeV^{2}, and provide for the first time a precise mapping of β_{M1}(Q^{2}) in the low-Q^{2} region.
Language	English
Publishing date	2019-11-19
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.123.192302
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Article ; Online: First Measurement of Hard Exclusive π^{-}Δ^{++} Electroproduction Beam-Spin Asymmetries off the Proton.

Diehl, S / Trotta, N / Joo, K / Achenbach, P / Akbar, Z / Armstrong, W R / Atac, H / Avakian, H / Baashen, L / Baltzell, N A / Barion, L / Bashkanov, M / Battaglieri, M / Bedlinskiy, I / Benmokhtar, F / Bianconi, A / Biselli, A S / Bossù, F / Brinkmann, K-T /

Briscoe, W J / Bulumulla, D / Burkert, V / Capobianco, R / Carman, D S / Carvajal, J C / Celentano, A / Charles, G / Chatagnon, P / Chesnokov, V / Ciullo, G / Cole, P L / Contalbrigo, M / Costantini, G / Crede, V / D'Angelo, A / Dashyan, N / De Vita, R / Deur, A / Djalali, C / Dupre, R / Ehrhart, M / El Alaoui, A / El Fassi, L / Elouadrhiri, L / Fegan, S / Filippi, A / Gavalian, G / Glazier, D I / Golubenko, A A / Gosta, G / Gothe, R W / Gotra, Y / Griffioen, K / Hafidi, K / Hakobyan, H / Hattawy, M / Hayward, T B / Heddle, D / Hobart, A / Holtrop, M / Illari, I / Ireland, D G / Isupov, E L / Jo, H S / Johnston, R / Keller, D / Khachatryan, M / Khanal, A / Kim, A / Kim, W / Klimenko, V / Kripko, A / Kubarovsky, V / Kuhn, S E / Lagerquist, V / Lanza, L / Leali, M / Lee, S / Lenisa, P / Li, X / MacGregor, I J D / Marchand, D / Mascagna, V / Matousek, G / McKinnon, B / McLauchlin, C / Meziani, Z E / Migliorati, S / Milner, R G / Mineeva, T / Mirazita, M / Mokeev, V / Moran, P / Munoz Camacho, C / Naidoo, P / Neupane, K / Niccolai, S / Niculescu, G / Osipenko, M / Pandey, P / Paolone, M / Pappalardo, L L / Paremuzyan, R / Paul, S J / Phelps, W / Pilleux, N / Pokhrel, M / Poudel, J / Price, J W / Prok, Y / Radic, A / Raue, B A / Reed, T / Richards, J / Ripani, M / Ritman, J / Rossi, P / Sabatié, F / Salgado, C / Schadmand, S / Schmidt, A / Sharabian, Y G / Shrestha, U / Sokhan, D / Sparveris, N / Spreafico, M / Stepanyan, S / Strakovsky, I / Strauch, S / Turisini, M / Tyson, R / Ungaro, M / Vallarino, S / Venturelli, L / Voskanyan, H / Voutier, E / Watts, D P / Wei, X / Williams, R / Wishart, R / Wood, M H / Yurov, M / Zachariou, N / Zhao, Z W / Zurek, M

Physical review letters

2023 Volume 131, Issue 2, Page(s) 21901

Abstract: The polarized cross-section ratio σ_{LT^{'}}/σ_{0} from hard exclusive π^{-}Δ^{++} electroproduction off an unpolarized hydrogen target has been extracted based on beam-spin asymmetry measurements using a 10.2 GeV/10.6 GeV incident electron beam and ... ...

Abstract	The polarized cross-section ratio σ_{LT^{'}}/σ_{0} from hard exclusive π^{-}Δ^{++} electroproduction off an unpolarized hydrogen target has been extracted based on beam-spin asymmetry measurements using a 10.2 GeV/10.6 GeV incident electron beam and the CLAS12 spectrometer at Jefferson Lab. The study, which provides the first observation of this channel in the deep-inelastic regime, focuses on very forward-pion kinematics in the valence regime, and photon virtualities ranging from 1.5 GeV^{2} up to 7 GeV^{2}. The reaction provides a novel access to the d-quark content of the nucleon and to p→Δ^{++} transition generalized parton distributions. A comparison to existing results for hard exclusive π^{+}n and π^{0}p electroproduction is provided, which shows a clear impact of the excitation mechanism, encoded in transition generalized parton distributions, on the asymmetry.
Language	English
Publishing date	2023-07-28
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.131.021901
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Article ; Online: Improved Λp Elastic Scattering Cross Sections between 0.9 and 2.0 GeV/c as a Main Ingredient of the Neutron Star Equation of State.

Rowley, J / Compton, N / Djalali, C / Hicks, K / Price, J / Zachariou, N / Adhikari, K P / Armstrong, W R / Atac, H / Baashen, L / Barion, L / Bashkanov, M / Battaglieri, M / Bedlinskiy, I / Benmokhtar, F / Bianconi, A / Biondo, L / Biselli, A S / Bondi, M /

Bossù, F / Boiarinov, S / Briscoe, W J / Brooks, W K / Bulumulla, D / Burkert, V D / Carman, D S / Carvajal, J C / Celentano, A / Chatagnon, P / Chesnokov, V / Chetry, T / Ciullo, G / Clark, L / Cole, P L / Contalbrigo, M / Costantini, G / Crede, V / D'Angelo, A / Dashyan, N / De Vita, R / Defurne, M / Deur, A / Diehl, S / Dupré, R / Egiyan, H / Ehrhart, M / El Alaoui, A / El Fassi, L / Eugenio, P / Fedotov, G / Fegan, S / Fersch, R / Filippi, A / Fradi, A / Gavalian, G / Girod, F X / Glazier, D I / Golubenko, A / Gothe, R W / Griffioen, K / Guo, L / Hafidi, K / Hakobyan, H / Hattawy, M / Hayward, T B / Heddle, D / Hobart, A / Holtrop, M / Ilieva, Y / Ireland, D G / Isupov, E L / Jenkins, D / Jo, H S / Joo, K / Keller, D / Khanal, A / Khandaker, M / Kim, A / Korover, I / Kripko, A / Kubarovsky, V / Kuhn, S E / Lanza, L / Leali, M / Lenisa, P / Livingston, K / MacGregor, I J D / Marchand, D / Markov, N / Marsicano, L / Mascagna, V / McCracken, M E / McKinnon, B / McLauchlin, C / Meziani, Z E / Migliorati, S / Mineeva, T / Mirazita, M / Mokeev, V / Munevar, E / Munoz Camacho, C / Nadel-Turonski, P / Neupane, K / Niccolai, S / Niculescu, G / O'Connell, T R / Osipenko, M / Ostrovidov, A I / Pandey, P / Paolone, M / Pappalardo, L L / Pasyuk, E / Pogorelko, O / Prok, Y / Reed, T / Ripani, M / Ritman, J / Rizzo, A / Rosner, G / Sabatie, F / Salgado, C / Schmidt, A / Schumacher, R A / Sharabian, Y G / Shrestha, U / Sokhan, D / Soto, O / Sparveris, N / Strakovsky, I I / Strauch, S / Tyson, R / Ungaro, M / Venturelli, L / Voskanyan, H / Vossen, A / Voutier, E / Watts, D P / Wei, K / Wei, X / Wishart, R / Wood, M H / Yale, B / Yurov, M / Zhang, J / Zhao, Z W

Physical review letters

2022 Volume 127, Issue 27, Page(s) 272303

Abstract: Strange matter is believed to exist in the cores of neutron stars based on simple kinematics. If this is true, then hyperon-nucleon interactions will play a significant part in the neutron star equation of state. Yet, compared to other elastic scattering ...

Abstract	Strange matter is believed to exist in the cores of neutron stars based on simple kinematics. If this is true, then hyperon-nucleon interactions will play a significant part in the neutron star equation of state. Yet, compared to other elastic scattering processes, there is very little data on Λ-N scattering. This experiment utilized the CEBAF Large Acceptance Spectrometer (CLAS) detector to study the Λp→Λp elastic scattering cross section in the incident Λ momentum range 0.9-2.0 GeV/c. These are the first data on this reaction since the 1970s. The new cross sections have significantly better accuracy and precision than the existing world data, and the techniques developed here can also be used in future experiments.
Language	English
Publishing date	2022-01-21
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.127.272303
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Article ; Online: Measurement of the Nucleon F_{2}^{n}/F_{2}^{p} Structure Function Ratio by the Jefferson Lab MARATHON Tritium/Helium-3 Deep Inelastic Scattering Experiment.

Abrams, D / Albataineh, H / Aljawrneh, B S / Alsalmi, S / Androic, D / Aniol, K / Armstrong, W / Arrington, J / Atac, H / Averett, T / Gayoso, C Ayerbe / Bai, X / Bane, J / Barcus, S / Beck, A / Bellini, V / Bhatt, H / Bhetuwal, D / Biswas, D /

Blyth, D / Boeglin, W / Bulumulla, D / Butler, J / Camsonne, A / Carmignotto, M / Castellanos, J / Chen, J-P / Cohen, E O / Covrig, S / Craycraft, K / Cruz-Torres, R / Dongwi, B / Duran, B / Dutta, D / Fuchey, E / Gal, C / Gautam, T N / Gilad, S / Gnanvo, K / Gogami, T / Gomez, J / Gu, C / Habarakada, A / Hague, T / Hansen, J-O / Hattawy, M / Hauenstein, F / Higinbotham, D W / Holt, R J / Hughes, E W / Hyde, C / Ibrahim, H / Jian, S / Joosten, S / Karki, A / Karki, B / Katramatou, A T / Keith, C / Keppel, C / Khachatryan, M / Khachatryan, V / Khanal, A / Kievsky, A / King, D / King, P M / Korover, I / Kulagin, S A / Kumar, K S / Kutz, T / Lashley-Colthirst, N / Li, S / Li, W / Liu, H / Liuti, S / Liyanage, N / Markowitz, P / McClellan, R E / Meekins, D / Beck, S Mey-Tal / Meziani, Z-E / Michaels, R / Mihovilovic, M / Nelyubin, V / Nguyen, D / Nuruzzaman / Nycz, M / Obrecht, R / Olson, M / Owen, V F / Pace, E / Pandey, B / Pandey, V / Paolone, M / Papadopoulou, A / Park, S / Paul, S / Petratos, G G / Petti, R / Piasetzky, E / Pomatsalyuk, R / Premathilake, S / Puckett, A J R / Punjabi, V / Ransome, R D / Rashad, M N H / Reimer, P E / Riordan, S / Roche, J / Salmè, G / Santiesteban, N / Sawatzky, B / Scopetta, S / Schmidt, A / Schmookler, B / Segal, J / Segarra, E P / Shahinyan, A / Širca, S / Sparveris, N / Su, T / Suleiman, R / Szumila-Vance, H / Tadepalli, A S / Tang, L / Tireman, W / Tortorici, F / Urciuoli, G M / Wojtsekhowski, B / Wood, S / Ye, Z H / Ye, Z Y / Zhang, J

Physical review letters

2022 Volume 128, Issue 13, Page(s) 132003

Abstract: The ratio of the nucleon F_{2} structure functions, F_{2}^{n}/F_{2}^{p}, is determined by the MARATHON experiment from measurements of deep inelastic scattering of electrons from ^{3}H and ^{3}He nuclei. The experiment was performed in the Hall A ... ...

Abstract	The ratio of the nucleon F_{2} structure functions, F_{2}^{n}/F_{2}^{p}, is determined by the MARATHON experiment from measurements of deep inelastic scattering of electrons from ^{3}H and ^{3}He nuclei. The experiment was performed in the Hall A Facility of Jefferson Lab using two high-resolution spectrometers for electron detection, and a cryogenic target system which included a low-activity tritium cell. The data analysis used a novel technique exploiting the mirror symmetry of the two nuclei, which essentially eliminates many theoretical uncertainties in the extraction of the ratio. The results, which cover the Bjorken scaling variable range 0.19<x<0.83, represent a significant improvement compared to previous SLAC and Jefferson Lab measurements for the ratio. They are compared to recent theoretical calculations and empirical determinations of the F_{2}^{n}/F_{2}^{p} ratio.<br />
Language	English
Publishing date	2022-04-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.128.132003
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Article ; Online: First Measurement of Timelike Compton Scattering.

Chatagnon, P / Niccolai, S / Stepanyan, S / Amaryan, M J / Angelini, G / Armstrong, W R / Atac, H / Ayerbe Gayoso, C / Baltzell, N A / Barion, L / Bashkanov, M / Battaglieri, M / Bedlinskiy, I / Benmokhtar, F / Bianconi, A / Biondo, L / Biselli, A S / Bondi, M / Bossù, F /

Boiarinov, S / Briscoe, W J / Brooks, W K / Bulumulla, D / Burkert, V D / Carman, D S / Carvajal, J C / Caudron, M / Celentano, A / Chetry, T / Ciullo, G / Clark, L / Cole, P L / Contalbrigo, M / Costantini, G / Crede, V / D'Angelo, A / Dashyan, N / Defurne, M / De Vita, R / Deur, A / Diehl, S / Djalali, C / Dupré, R / Egiyan, H / Ehrhart, M / El Alaoui, A / El Fassi, L / Elouadrhiri, L / Fegan, S / Fersch, R / Filippi, A / Gavalian, G / Ghandilyan, Y / Gilfoyle, G P / Girod, F X / Glazier, D I / Golubenko, A A / Gothe, R W / Gotra, Y / Griffioen, K A / Guidal, M / Guo, L / Hakobyan, H / Hattawy, M / Hayward, T B / Heddle, D / Hobart, A / Holtrop, M / Hyde, C E / Ilieva, Y / Ireland, D G / Isupov, E L / Jo, H S / Joo, K / Kabir, M L / Keller, D / Khachatryan, G / Khanal, A / Kim, A / Kim, W / Kripko, A / Kubarovsky, V / Kuhn, S E / Lanza, L / Leali, M / Lee, S / Lenisa, P / Livingston, K / MacGregor, I J D / Marchand, D / Marsicano, L / Mascagna, V / McKinnon, B / McLauchlin, C / Migliorati, S / Mirazita, M / Mokeev, V / Montgomery, R A / Munoz Camacho, C / Nadel-Turonski, P / Naidoo, P / Neupane, K / O'Connell, T R / Osipenko, M / Ouillon, M / Pandey, P / Paolone, M / Pappalardo, L L / Paremuzyan, R / Pasyuk, E / Phelps, W / Pogorelko, O / Poudel, J / Price, J W / Prok, Y / Raue, B A / Reed, T / Ripani, M / Rizzo, A / Rossi, P / Rowley, J / Sabatié, F / Schmidt, A / Segarra, E P / Sharabian, Y G / Shirokov, E V / Shrestha, U / Sokhan, D / Soto, O / Sparveris, N / Strakovsky, I I / Strauch, S / Tyler, N / Tyson, R / Ungaro, M / Vallarino, S / Venturelli, L / Voskanyan, H / Vossen, A / Voutier, E / Watts, D P / Wei, K / Wei, X / Wishart, R / Yale, B / Zachariou, N / Zhang, J / Zhao, Z W

Physical review letters

2022 Volume 127, Issue 26, Page(s) 262501

Abstract: We present the first measurement of the timelike Compton scattering process, γp→p^{'}γ^{*}(γ^{*}→e^{+}e^{-}), obtained with the CLAS12 detector at Jefferson Lab. The photon beam polarization and the decay lepton angular asymmetries are reported in the ... ...

Abstract	We present the first measurement of the timelike Compton scattering process, γp→p^{'}γ^{}(γ^{}→e^{+}e^{-}), obtained with the CLAS12 detector at Jefferson Lab. The photon beam polarization and the decay lepton angular asymmetries are reported in the range of timelike photon virtualities 2.25<Q^{'2}<9 GeV^{2}, squared momentum transferred 0.1<-t<0.8 GeV^{2}, and average total center-of-mass energy squared s=14.5 GeV^{2}. The photon beam polarization asymmetry, similar to the beam-spin asymmetry in deep virtual Compton scattering, is sensitive to the imaginary part of the Compton form factors and provides a way to test the universality of the generalized parton distributions. The angular asymmetry of the decay leptons accesses the real part of the Compton form factors and thus the D-term in the parametrization of the generalized parton distributions.<br />
Language	English
Publishing date	2022-01-14
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.127.262501
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Article ; Online: Observation of Azimuth-Dependent Suppression of Hadron Pairs in Electron Scattering off Nuclei.

Paul, S J / Morán, S / Arratia, M / El Alaoui, A / Hakobyan, H / Brooks, W / Amaryan, M J / Armstrong, W R / Atac, H / Baashen, L / Baltzell, N A / Barion, L / Bashkanov, M / Battaglieri, M / Bedlinskiy, I / Benkel, B / Benmokhtar, F / Bianconi, A / Biondo, L /

Biselli, A S / Bondi, M / Bossù, F / Boiarinov, S / Brinkmann, K-Th / Briscoe, W J / Bulumulla, D / Burkert, V D / Capobianco, R / Carman, D S / Celentano, A / Chesnokov, V / Chetry, T / Ciullo, G / Cole, P L / Contalbrigo, M / Costantini, G / D'Angelo, A / Dashyan, N / De Vita, R / Defurne, M / Deur, A / Diehl, S / Dilks, C / Djalali, C / Dupre, R / Egiyan, H / El Fassi, L / Eugenio, P / Fegan, S / Filippi, A / Gavalian, G / Ghandilyan, Y / Gilfoyle, G P / Golubenko, A A / Gosta, G / Gothe, R W / Griffioen, K A / Guidal, M / Hattawy, M / Hayward, T B / Heddle, D / Hobart, A / Holtrop, M / Ilieva, Y / Ireland, D G / Isupov, E L / Jo, H S / Johnston, R / Joo, K / Joosten, S / Keller, D / Khanal, A / Khandaker, M / Kim, W / Kripko, A / Kubarovsky, V / Lagerquist, V / Lanza, L / Leali, M / Lee, S / Lenisa, P / Li, X / Livingston, K / MacGregor, I J D / Marchand, D / Mascagna, V / McKinnon, B / Meziani, Z E / Migliorati, S / Milner, R G / Mineeva, T / Mirazita, M / Mokeev, V I / Moran, P / Munoz Camacho, C / Neupane, K / Nguyen, D / Niccolai, S / Niculescu, G / Osipenko, M / Ostrovidov, A I / Pandey, P / Paolone, M / Pappalardo, L L / Paremuzyan, R / Pasyuk, E / Phelps, W / Pilleux, N / Pocanic, D / Pogorelko, O / Pokhrel, M / Poudel, J / Price, J W / Prok, Y / Raue, B A / Reed, T / Ripani, M / Rosner, G / Sabatié, F / Salgado, C / Schmidt, A / Schumacher, R A / Sharabian, Y G / Shirokov, E V / Shrestha, U / Simmerling, P / Sokhan, D / Sparveris, N / Stepanyan, S / Strakovsky, I I / Strauch, S / Tan, J A / Tyson, R / Ungaro, M / Vallarino, S / Venturelli, L / Voskanyan, H / Voutier, E / Wei, X / Wishart, R / Wood, M H / Zachariou, N / Zhao, Z W / Ziegler, V / Zurek, M

Physical review letters

2022 Volume 129, Issue 18, Page(s) 182501

Abstract: We present the first measurement of dihadron angular correlations in electron-nucleus scattering. The data were taken with the CLAS detector and a 5.0 GeV electron beam incident on deuterium, carbon, iron, and lead targets. Relative to deuterium, the ... ...

Abstract	We present the first measurement of dihadron angular correlations in electron-nucleus scattering. The data were taken with the CLAS detector and a 5.0 GeV electron beam incident on deuterium, carbon, iron, and lead targets. Relative to deuterium, the nuclear yields of charged-pion pairs show a strong suppression for azimuthally opposite pairs, no suppression for azimuthally nearby pairs, and an enhancement of pairs with large invariant mass. These effects grow with increased nuclear size. The data are qualitatively described by the gibuu model, which suggests that hadrons form near the nuclear surface and undergo multiple scattering in nuclei.These results show that angular correlation studies can open a new way to elucidate how hadrons form and interact inside nuclei.
Language	English
Publishing date	2022-11-01
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.129.182501
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Bonn / Germany

Z 4' 58/153: Show issues

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