4.7 Article

An explanation for dark matter and dark energy consistent with the standard model of particle physics and General Relativity

期刊

EUROPEAN PHYSICAL JOURNAL C
卷 79, 期 10, 页码 -

出版社

SPRINGER
DOI: 10.1140/epjc/s10052-019-7393-0

关键词

-

向作者/读者索取更多资源

Analyses of internal galaxy and cluster dynamics typically employ Newton's law of gravity, which neglects the field self-interaction effects of General Relativity. This may be why dark matter seems necessary. The universe evolution, on the other hand, is treated with the full theory, General Relativity. However, the approximations of isotropy and homogeneity, normally used to derive and solve the universe evolution equations, effectively suppress General Relativity's field self-interaction effects and this may introduce the need for dark energy. Calculations have shown that field self-interaction increases the binding of matter inside massive systems, which may account for galaxy and cluster dynamics without invoking dark matter. In turn, energy conservation dictates that the increased binding must be balanced by an effectively decreased gravitational interaction outside the massive system. In this article, such suppression is estimated and its consequence for the Universe's evolution is discussed. Observations are reproduced without need for dark energy.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Article Physics, Multidisciplinary

Multidimensional, High Precision Measurements of Beam Single Spin Asymmetries in Semi-inclusive π+ Electroproduction off Protons in the Valence Region

S. Diehl, A. Kim, G. Angelini, K. Joo, S. Adhikari, M. Amaryan, M. Arratia, H. Atac, H. Avakian, C. Ayerbe Gayoso, N. A. Baltzell, L. Barion, S. Bastami, M. Battaglieri, I Bedlinskiy, F. Benmokhtar, A. Bianconi, A. S. Biselli, M. Bondi, F. Bossu, S. Boiarinov, K-T Brinkmann, W. J. Briscoe, W. Brooks, D. Bulumulla, V. D. Burkert, D. S. Carman, J. C. Carvajal, A. Celentano, P. Chatagnon, T. Chetry, G. Ciullo, L. Clark, B. A. Clary, P. L. Cole, M. Contalbrigo, G. Costantini, V Crede, A. D'Angelo, N. Dashyan, R. De Vita, M. Defurne, A. Deur, C. Dilks, C. Djalali, M. Dugger, R. Dupre, H. Egiyan, M. Ehrhart, A. El Alaoui, L. El Fassi, L. Elouadrhiri, S. Fegan, A. Filippi, T. Forest, G. Gavalian, G. P. Gilfoyle, F. X. Girod, D. Glazier, A. A. Golubenko, R. W. Gothe, Y. Gotra, K. A. Griffioen, M. Guidal, K. Hafidi, H. Hakobyan, M. Hattawy, F. Hauenstein, T. B. Hayward, D. Heddle, K. Hicks, A. Hobart, M. Holtrop, C. E. Hyde, D. G. Ireland, E. L. Isupov, H. S. Jo, R. Johnston, S. Joosten, D. Keller, M. Khachatryan, A. Khanal, W. Kim, A. Kripko, V Kubarovsky, S. E. Kuhn, L. Lanza, M. Leali, S. Lee, P. Lenisa, K. Livingston, Z. Lu, I. J. D. MacGregor, D. Marchand, N. Markov, L. Marsicano, V Mascagna, B. McKinnon, Z. E. Meziani, R. G. Milner, T. Mineeva, M. Mirazita, V Mokeev, P. Moran, A. Movsisyan, C. Munoz Camacho, P. Nadel-Turonski, P. Naidoo, S. Nanda, K. Neupane, S. Niccolai, G. Niculescu, T. R. O'Connell, M. Osipenko, M. Paolone, L. L. Pappalardo, R. Paremuzyan, E. Pasyuk, W. Phelps, O. Pogorelko, Y. Prok, A. Prokudin, B. A. Raue, M. Ripani, J. Ritman, A. Rizzo, C. D. Roberts, P. Rossi, J. Rowley, F. Sabatie, C. Salgado, A. Schmidt, E. P. Segarra, Y. G. Sharabian, U. Shrestha, P. Simmerling, D. Sokhan, O. Soto, N. Sparveris, S. Stepanyan, P. Stoler, I. I. Strakovsky, S. Strauch, K. Tezgin, A. Thornton, N. Tyler, R. Tyson, M. Ungaro, L. Venturelli, H. Voskanyan, A. Vossen, E. Voutier, D. P. Watts, K. Wei, X. Wei, S-S Xu, B. Yale, N. Zachariou, J. Zhang

Summary: This study presents high precision measurements of the polarized electron beam-spin asymmetry in semi-inclusive deep inelastic scattering (SIDIS) from the proton. Through a multidimensional analysis of the data, the structure function ratio is determined, revealing novel aspects of the emergent hadron mass and quark-gluon correlations within the nucleon.

PHYSICAL REVIEW LETTERS (2022)

Article Astronomy & Astrophysics

Experimental study of the behavior of the Bjorken sum at very low Q2

A. Deur, J. P. Chen, S. E. Kuhn, C. Peng, M. Ripani, V Sulkosky, K. Adhikari, M. Battaglieri, V. D. Burkert, G. D. Cates, R. De Vita, G. E. Dodge, L. El Fassi, F. Garibaldi, H. Kang, M. Osipenko, J. T. Singh, K. Slifer, J. Zhang, X. Zheng

Summary: This study presents new data on the Bjorken sum. The data and predictions from chi EFT are marginally consistent, and the data are compared to various phenomenological models.

PHYSICS LETTERS B (2022)

Article Astronomy & Astrophysics

Effect of the field self-interaction of General Relativity on the cosmic microwave background anisotropies

Alexandre Deur

Summary: Field self-interactions can reduce or alleviate the dependency on dark matter and dark energy in describing the cosmic microwave background (CMB) power spectrum.

CLASSICAL AND QUANTUM GRAVITY (2022)

Correction Physics, Multidisciplinary

Measurement of the generalized spin polarizabilities of the neutron in the low-Q2 region (vol 17, pg 687, 2021)

Vincent Sulkosky, Chao Peng, Jian-ping Chen, Alexandre Deur, Sergey Abrahamyan, Konrad A. Aniol, David S. Armstrong, Todd Averett, Stephanie L. Bailey, Arie Beck, Pierre Bertin, Florentin Butaru, Werner Boeglin, Alexandre Camsonne, Gordon D. Cates, Chia-Cheh Chang, Seonho Choi, Eugene Chudakov, Luminita Coman, Juan C. Cornejo, Brandon Craver, Francesco Cusanno, Raffaele De Leo, Cornelis W. de Jager, Joseph D. Denton, Seema Dhamija, Robert Feuerbach, John M. Finn, Salvatore Frullani, Kirsten Fuoti, Haiyan Gao, Franco Garibaldi, Olivier Gayou, Ronald Gilman, Alexander Glamazdin, Charles Glashausser, Javier Gomez, Jens-Ole Hansen, David Hayes, F. William Hersman, Douglas W. Higinbotham, Timothy Holmstrom, Thomas B. Humensky, Charles E. Hyde, Hassan Ibrahim, Mauro Iodice, Xiandong Jiang, Lisa J. Kaufman, Aidan Kelleher, Kathryn E. Keister, Wooyoung Kim, Ameya Kolarkar, Norm Kolb, Wolfgang Korsch, Kevin Kramer, Gerfried Kumbartzki, Luigi Lagamba, Vivien Laine, Geraud Laveissiere, John J. Lerose, David Lhuillier, Richard Lindgren, Nilanga Liyanage, Hai-Jiang Lu, Bin Ma, Demetrius J. Margaziotis, Peter Markowitz, Kathleen R. McCormick, Mehdi Meziane, Zein-Eddine Meziani, Robert Michaels, Bryan Moffit, Peter Monaghan, Sirish Nanda, Jennifer Niedziela, Mikhail Niskin, Ronald Pandolfi, Kent D. Paschke, Milan Potokar, Andrew Puckett, Vina A. Punjabi, Yi Qiang, Ronald D. Ransome, Bodo Reitz, Rikki Roche, Arun Saha, Alexander Shabetai, Simon Sirca, Jaideep T. Singh, Karl Slifer, Ryan Snyder, Patricia Solvignon, Robert Stringer, Ramesh Subedi, William A. Tobias, Ngyen Ton, Paul E. Ulmer, Guido Maria Urciuoli, Antonin Vacheret, Eric Voutier, Kebin Wang, Lu Wan, Bogdan Wojtsekhowski, Seungtae Woo, Huan Yao, Jing Yuan, Xiaohui Zhan, Xiaochao Zheng, Lingyan Zhu

NATURE PHYSICS (2022)

Article Physics, Fluids & Plasmas

Polarized fusion and potential in situ tests of fuel polarization survival in a tokamak plasma

L. Baylor, A. Deur, N. Eidietis, W. W. Heidbrink, G. L. Jackson, J. Liu, M. M. Lowry, G. W. Miller, D. Pace, A. M. Sandorfi, S. P. Smith, S. Tafti, K. Wei, X. Wei, X. Zheng

Summary: The use of spin-polarized fusion fuels can greatly contribute to the ignition of a burning plasma. Simulation shows that the cross section for D + T & RARR; & alpha; + n can be increased by 1.5 if the fuels have parallel polarization. Recent advances in laser-driven sources and the prediction of negligible wall recycling in ITER have made the large scale fueling of a power reactor possible. The crucial next step is to demonstrate the survival of spin polarizations in a plasma, which can be achieved through measurement strategies using isospin-mirror reactions.

NUCLEAR FUSION (2023)

Article Physics, Nuclear

Exclusive π- electroproduction off the neutron in deuterium in the resonance region

Y. Tian, R. W. Gothe, V. Mokeev, G. Hollis, M. J. Amaryan, W. R. Armstrong, H. Atac, H. Avakian, L. Barion, M. Battaglieri, I Bedlinskiy, B. Benkel, F. Benmokhtar, A. Bianconi, L. Biondo, A. Biselli, F. Bossu, S. Boiarinov, M. Bondi, K. T. Brinkmann, W. J. Briscoe, S. Bueltmann, D. Bulumulla, V. D. Burkert, R. Capobianco, D. S. Carman, J. C. Carvajal, A. Celentano, V Chesnokov, T. Chetry, G. Ciullo, G. Clash, P. L. Cole, M. Contalbrigo, G. Costantini, A. D'Angelo, N. Dashyan, R. De Vita, M. Defurne, A. Deur, S. Diehl, C. Djalali, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, L. Elouadrhiri, P. Eugenio, S. Fegan, A. Filippi, G. Gavalian, G. P. Gilfoyle, F. X. Girod, A. A. Golubenko, G. Gosta, K. Griffioen, M. Guidal, H. Hakobyan, M. Hattawy, T. B. Hayward, A. Hobart, M. Holtrop, Y. Ilieva, D. G. Ireland, E. L. Isupov, D. Jenkins, H. S. Jo, K. Joo, S. Joosten, D. Keller, A. Khanal, M. Khandaker, A. Kim, W. Kim, F. J. Klein, A. Kripko, V Kubarovsky, V Lagerquist, L. Lanza, M. Leali, P. Lenisa, K. Livingston, I. J. D. MacGregor, D. Marchand, L. Marsicano, V Mascagna, B. McKinnon, S. Migliorati, T. Mineeva, M. Mirazita, C. Munoz Camacho, P. Nadel-Turonski, P. Naidoo, K. Neupane, J. Newton, S. Niccolai, M. Nicol, G. Niculescu, M. Osipenko, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan, K. Park, E. Pasyuk, S. J. Paul, W. Phelps, N. Pilleux, D. Pocanic, O. Pogorelko, J. Poudel, J. W. Price, Y. Prok, T. Reed, M. Ripani, J. Ritman, A. Rizzo, G. Rosner, F. Sabatie, C. Salgado, S. Schadmand, A. Schmidt, R. A. Schumacher, E. Shirokov, U. Shrestha, P. Simmerling, D. Sokhan, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, R. Tyson, M. Ungaro, L. Venturelli, H. Voskanyan, E. Voutier, D. P. Watts, K. Wei, X. Wei, M. H. Wood, B. Yale, N. Zachariou, J. Zhang

Summary: New results for exclusive and quasifree cross sections off bound neutrons in deuterium have been obtained. The analysis of experimental data provides valuable input for the extraction of Q(2) evolution of previously unavailable n -> N* electroexcitation amplitudes and improvement of neutrino scattering models.

PHYSICAL REVIEW C (2023)

Article Astronomy & Astrophysics

Searching for prompt and long-lived dark photons in electroproduced e+ e- pairs with the heavy photon search experiment at JLab

P. H. Adrian, N. A. Baltzell, M. Battaglieri, M. Bondi, S. Boyarinov, C. Bravo, S. Bueltmann, P. Butti, V. D. Burkert, D. Calvo, T. Cao, M. Carpinelli, A. Celentano, G. Charles, L. Colaneri, W. Cooper, B. Crowe, C. Cuevas, A. D'Angelo, N. Dashyan, M. De Napoli, R. De Vita, A. Deur, M. Diamond, R. Dupre, H. Egiyan, L. Elouadrhiri, R. Essig, V. Fadeyev, C. Field, A. Filippi, A. Freyberger, M. Garcon, N. Gevorgyan, F. X. Girod, N. Graf, M. Graham, K. A. Griffioen, A. Grillo, M. Guidal, R. Herbst, M. Holtrop, J. Jaros, R. P. Johnson, G. Kalicy, M. Khandaker, V. Kubarovsky, E. Leonora, K. Livingston, L. Marsicano, T. Maruyama, S. McCarty, J. McCormick, B. McKinnon, K. Moffeit, O. Moreno, C. Munoz Camacho, T. Nelson, S. Niccolai, A. Odian, M. Oriunno, M. Osipenko, R. Paremuzyan, S. Paul, N. Randazzo, B. Raydo, B. Reese, A. Rizzo, P. Schuster, Y. G. Sharabian, G. Simi, A. Simonyan, V. Sipala, A. Spellman, D. Sokhan, M. Solt, S. Stepanyan, H. Szumila-Vance, N. Toro, S. Uemura, M. Ungaro, H. Voskanyan, L. B. Weinstein, B. Wojtsekhowski

Summary: The heavy photon search experiment (HPS) at the Thomas Jefferson National Accelerator Facility searches for electroproduced dark photons. Results from the 2016 engineering run show no evidence of dark photons in both the prompt and displaced vertex searches. HPS plans to explore new dark photon phase space in 2019 and 2021.

PHYSICAL REVIEW D (2023)

Article Astronomy & Astrophysics

Experimental Determination of the QCD Effective Charge αg1(Q)

Alexandre Deur, Volker Burkert, Jian-Ping Chen, Wolfgang Korsch

Summary: The QCD effective charge alpha(g1)(Q) is an observable that characterizes the magnitude of the strong interaction. Measurements carried out at Jefferson Lab have provided improved and expanded results for alpha(g1)(Q) in the low to moderately high momentum range. The data show that alpha(g1)(Q) becomes independent of momentum at very low Q and compare well with recent predictions based on Dyson-Schwinger equations and the AdS/CFT duality.

PARTICLES (2022)

Article Physics, Nuclear

Beam-recoil transferred polarization in K+Y electroproduction in the nucleon resonance region with CLAS12

D. S. Carman, A. D'Angelo, L. Lanza, V. Mokeev, K. P. Adhikari, M. J. Amaryan, W. R. Armstrong, H. Atac, H. Avakian, C. Ayerbe Gayoso, N. A. Baltzell, L. Barion, I Bedlinskiy, M. Battaglieri, B. Benkel, A. Bianconi, A. S. Biselli, M. Bondi, S. Boiarinov, F. Bossu, W. J. Briscoe, S. Bueltmann, D. Bulumulla, V. D. Burkert, R. Capobianco, J. C. Carvajal, A. Celentano, P. Chatagnon, V Chesnokov, T. Chetry, G. Ciullo, L. Clark, P. L. Cole, M. Contalbrigo, G. Costantini, V Crede, N. Dashyan, R. De Vita, M. Defurne, A. Deur, S. Diehl, C. Djalali, R. Dupre, M. Ehrhart, A. El Alaoui, L. El Fassi, L. Elouadrhiri, S. Fegan, A. Filippi, G. Gavalian, Y. Ghandilyan, G. P. Gilfoyle, F. X. Girod, D. Glazier, A. A. Golubenko, R. W. Gothe, Y. Gotra, K. A. Griffioen, K. Hafidi, H. Hakobyan, M. Hattawy, F. Hauenstein, T. B. Hayward, A. Hobart, M. Holtrop, Y. Ilieva, D. G. Ireland, E. L. Isupov, H. S. Jo, K. Joo, D. Keller, A. Khanal, A. Kim, W. Kim, V Klimenko, A. Kripko, V Kubarovsky, M. Leali, S. Lee, P. Lenisa, K. Livingston, I. J. D. MacGregor, D. Marchand, L. Marsicano, V Mascagna, M. Mayer, B. McKinnon, S. Migliorati, T. Mineeva, M. Mirazita, R. A. Montgomery, C. Munoz Camacho, P. Nadel-Turonski, K. Neupane, J. Newton, S. Niccolai, M. Osipenko, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan, E. Pasyuk, S. J. Paul, N. Pilleux, O. Pogorelko, J. W. Price, Y. Prok, B. A. Raue, T. Reed, M. Ripani, J. Ritman, A. Rizzo, P. Rossi, F. Sabatie, C. Salgado, A. Schmidt, Y. G. Sharabian, E. Shirokov, U. Shrestha, P. Simmerling, D. Sokhan, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, N. Tyler, R. Tyson, M. Ungaro, S. Vallarino, L. Venturelli, H. Voskanyan, E. Voutier, D. P. Watts, K. Wei, X. Wei, R. Wishart, M. H. Wood, B. Yale, N. Zachariou, J. Zhang, V Ziegler

Summary: In this study, beam-recoil transferred polarizations for the exclusive electroproduction of K+ Lambda and K+Sigma(0) final states from an unpolarized proton target were measured using the CLAS12 spectrometer at Jefferson Laboratory. These new data are important for exploring the reaction mechanism in strangeness production processes, understanding the spectrum and structure of excited nucleon states, and gaining insights into the strong interaction in the regime of nonperturbative dynamics.

PHYSICAL REVIEW C (2022)

Review Physics, Applied

Artificial dynamical effects in quantum field theory

Stanley J. Brodsky, Alexandre Deur, Craig D. Roberts

Summary: This article discusses the issues that can arise when studying a system in a non-Galilean reference frame or in a framework that violates Poincare invariance, and highlights how these issues can be avoided using light-front Hamiltonian quantization.

NATURE REVIEWS PHYSICS (2022)

Article Physics, Nuclear

Single-pion contribution to the Gerasimov-Drell-Hearn sum rule and related integrals

Igor Strakovsky, Simon Sirca, William J. Briscoe, Alexandre Deur, Axel Schmidt, Ron L. Workman

Summary: Phenomenological amplitudes obtained in partial-wave analyses of single-pion photoproduction are used to evaluate the contribution of this process to the Gerasimov-Drell-Hearn, Baldin, and Gell-Mann-Goldberger-Thirring sum rules. The study confirms that the single-pion contribution converges for all sum rules, but the saturation levels vary significantly. The Baldin integrals for the proton and neutron are both saturated to about four fifths of the predicted total strength.

PHYSICAL REVIEW C (2022)

Article Astronomy & Astrophysics

Search for photoproduction of axionlike particles at GlueX

S. Adhikari, C. S. Akondi, M. Albrecht, A. Ali, M. Amaryan, A. Asaturyan, A. Austregesilo, Z. Baldwin, F. Barbosa, J. Barlow, E. Barriga, R. Barsotti, T. D. Beattie, V. V. Berdnikov, T. Black, W. Boeglin, W. J. Briscoe, T. Britton, W. K. Brooks, E. Chudakov, S. Cole, P. L. Cole, O. Cortes, V. Crede, M. M. Dalton, A. Deur, S. Dobbs, A. Dolgolenko, R. Dotel, M. Dugger, R. Dzhygadlo, D. Ebersole, H. Egiyan, T. Erbora, A. Ernst, P. Eugenio, C. Fanelli, S. Fegan, J. Fitches, A. M. Foda, S. Furletov, L. Gan, H. Gao, A. Gasparian, C. Gleason, K. Goetzen, V. S. Goryachev, L. Guo, M. Hagen, H. Hakobyan, A. Hamdi, J. Hernandez, N. D. Hoffman, G. Hou, G. M. Huber, A. Hurley, D. G. Ireland, M. M. Ito, I. Jaegle, N. S. Jarvis, R. T. Jones, V. Kakoyan, G. Kalicy, M. Kamel, V. Khachatryan, M. Khatchatryan, C. Kourkoumelis, S. Kuleshov, A. LaDuke, I. Larin, D. Lawrence, D. I. Lersch, H. Li, W. B. Li, B. Liu, K. Livingston, G. J. Lolos, L. Lorenti, K. Luckas, V. Lyubovitskij, D. Mack, A. Mahmood, H. Marukyan, V. Matveev, M. McCaughan, M. McCracken, C. A. Meyer, R. Miskimen, R. E. Mitchell, K. Mizutani, V. Neelamana, F. Nerling, L. Ng, A. Ostrovidov, Z. Papandreou, C. Paudel, P. Pauli, R. Pedroni, L. Pentchev, K. J. Peters, J. Reinhold, B. G. Ritchie, J. Ritman, G. Rodriguez, D. Romanov, C. Romero, K. Saldana, C. Salgado, S. Schadmand, A. M. Schertz, A. Schick, A. Schmidt, R. A. Schumacher, J. Schwiening, P. Sharp, X. Shen, M. R. Shepherd, A. Smith, E. S. Smith, D. I. Sober, A. Somov, S. Somov, O. Soto, J. R. Stevens, I. I. Strakovsky, B. Sumner, K. Suresh, V. V. Tarasov, S. Taylor, A. Teymurazyan, A. Thiel, G. Vasileiadis, T. Viducic, T. Whitlatch, N. Wickramaarachchi, M. Williams, Y. Yang, S. Yoon, J. Zarling, Z. Zhang, Z. Zhao, J. Zhou, X. Zhou, B. Zihlmann

Summary: In this study, a search for axionlike particles produced in photon-proton collisions is presented. Different decay channels are explored using a large dataset collected with the GlueX detector. No evidence for a signal is found, and the most stringent constraints on the a-gluon coupling strength to date are placed.

PHYSICAL REVIEW D (2022)

Article Physics, Nuclear

Measurement of spin density matrix elements in Λ(1520) photoproduction at 8.2-8.8 GeV

S. Adhikari, C. S. Akondi, M. Albrecht, A. Ali, M. Amaryan, A. Asaturyan, A. Austregesilo, Z. Baldwin, F. Barbosa, J. Barlow, E. Barriga, R. Barsotti, T. D. Beattie, V. V. Berdnikov, T. Black, W. Boeglin, W. J. Briscoe, T. Britton, W. K. Brooks, E. Chudakov, S. Cole, P. L. Cole, O. Cortes, V Crede, M. M. Dalton, T. Daniels, A. Deur, S. Dobbs, A. Dolgolenko, R. Dotel, M. Dugger, R. Dzhygadlo, H. Egiyan, T. Erbora, A. Ernst, P. Eugenio, C. Fanelli, S. Fegan, J. Fitches, A. M. Foda, S. Furletov, L. Gan, H. Gao, A. Gasparian, C. Gleason, K. Goetzen, V. S. Goryachev, L. Guo, M. Hagen, H. Hakobyan, A. Hamdi, J. Hernandez, N. D. Hoffman, G. Hou, G. M. Huber, A. Hurley, D. G. Ireland, M. M. Ito, I Jaegle, N. S. Jarvis, R. T. Jones, V Kakoyan, G. Kalicy, M. Kamel, V Khachatryan, M. Khatchatryan, C. Kourkoumelis, S. Kuleshov, A. LaDuke, I Larin, D. Lawrence, D. Lersch, H. Li, W. B. Li, B. Liu, K. Livingston, G. J. Lolos, K. Luckas, V Lyubovitskij, D. Mack, A. Mahmood, H. Marukyan, V Matveev, M. McCaughan, M. McCracken, C. A. Meyer, R. Miskimen, R. E. Mitchell, K. Mizutani, V Neelamana, F. Nerling, L. Ng, A. Ostrovidov, Z. Papandreou, C. Paudel, P. Pauli, R. Pedroni, L. Pentchev, K. J. Peters, J. Reinhold, B. G. Ritchie, J. Ritman, G. Rodriguez, D. Romanov, C. Romero, K. Saldana, C. Salgado, S. Schadmand, A. M. Schertz, A. Schick, A. Schmidt, R. A. Schumacher, J. Schwiening, P. Sharp, X. Shen, M. R. Shepherd, A. Smith, E. S. Smith, D. Sober, A. Somov, S. Somov, O. Soto, J. R. Stevens, I. I. Strakovsky, B. Sumner, K. Suresh, V. V. Tarasov, S. Taylor, A. Teymurazyan, A. Thiel, G. Vasileiadis, T. Viducic, T. Whitlatch, N. Wickramaarachchi, M. Williams, Y. Yang, J. Zarling, Z. Zhang, Z. Zhao, J. Zhou, X. Zhou, Q. Zhou, B. Zihlmann, D. Glazier, V Mathieu

Summary: We report on the measurement of spin density matrix elements of the Lambda(1520) in photoproduction reaction, and find that natural exchange amplitudes dominate the Lambda(1520) photoproduction process.

PHYSICAL REVIEW C (2022)

Article Physics, Nuclear

Polarized structure function σLT′ from π0p electroproduction data in the resonance region at 0.4 GeV2 < Q2 < 1.0 GeV2

E. L. Isupov, V. D. Burkert, A. A. Golubenko, K. Joo, N. S. Markov, V. Mokeev, L. C. Smith, W. R. Armstrong, H. Atac, H. Avakian, N. A. Baltzell, L. Barion, M. Battaglieri, I Bedlinskiy, F. Benmokhtar, A. Bianconi, L. Biondo, A. S. Biselli, M. Bondi, F. Bossu, W. J. Briscoe, W. K. Brooks, D. Bulumulla, R. A. Capobianco, D. S. Carman, J. C. Carvajal, P. Chatagnon, V Chesnokov, G. Ciullo, P. L. Cole, B. A. Clary, M. Contalbrigo, G. Costantini, A. D'Angelo, N. Dashyan, R. De Vita, M. Defurne, A. Deur, S. Diehl, C. Djalali, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, L. Elouadrhiri, P. Eugenio, S. Fegan, A. Filippi, G. Gavalian, G. P. Gilfoyle, D. Glazier, R. W. Gothe, K. A. Griffioen, M. Guidal, L. Guo, K. Hafidi, H. Hakobyan, M. Hattawy, T. B. Hayward, D. Heddle, K. Hicks, A. Hobart, M. Holtrop, I. Illari, D. G. Ireland, D. Jenkins, H. S. Jo, D. Keller, A. Khanal, M. Khandaker, A. Kim, W. Kim, F. J. Klein, V Klimenko, A. Kripko, V Kubarovsky, V Lagerquist, L. Lanza, M. Leali, P. Lenisa, K. Livingston, I. J. D. MacGregor, D. Marchand, L. Marsicano, V Mascagna, B. McKinnon, Z. E. Meziani, S. Migliorati, T. Mineeva, M. Mirazita, C. Munoz Camacho, P. Nadel-Turonski, K. Neupane, S. Niccolai, M. Osipenko, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan, E. Pasyuk, S. J. Paul, W. Phelps, N. Pilleux, O. Pogorelko, J. Poudel, J. W. Price, Y. Prok, B. A. Raue, T. Reed, M. Ripani, J. Ritman, J. Rowley, F. Sabatie, C. Salgado, A. Schmidt, R. A. Schumacher, Y. G. Sharabian, E. Shirokov, U. Shrestha, P. Simmerling, D. Sokhan, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, J. A. Tan, R. Tyson, M. Ungaro, S. Vallarino, L. Venturelli, H. Voskanyan, E. Voutier, D. Watts, K. Wei, X. Wei, M. H. Wood, B. Yale, N. Zachariou, J. Zhang, V Ziegler

Summary: The first results on the sigma(LT') structure function in exclusive pi(0)p electroproduction at certain invariant masses and photon virtualities were obtained from data on beam spin asymmetries and differential cross sections measured with the CLAS detector at Jefferson Lab. The Legendre moments from the sigma(LT') structure function have shown sensitivity to the contributions from nucleon resonances in the second and third resonance regions. These new data on beam spin asymmetries in pi(0)p electroproduction provide opportunities for extracting nucleon resonance electro-excitation amplitudes above 1.6 GeV.

PHYSICAL REVIEW C (2022)

Article Physics, Nuclear

Measurement of charged-pion production in deep-inelastic scattering off nuclei with the CLAS detector

S. Moran, R. Dupre, H. Hakobyan, M. Arratia, W. K. Brooks, A. Borquez, A. El Alaoui, L. El Fassi, K. Hafidi, R. Mendez, T. Mineeva, S. J. Paul, M. J. Amaryan, Giovanni Angelini, Whitney R. Armstrong, H. Atac, N. A. Baltzell, L. Barion, M. Bashkanov, M. Battaglieri, I. Bedlinskiy, Fatiha Benmokhtar, A. Bianconi, L. Biondo, A. S. Biselli, F. Bossu, S. Boiarinov, W. J. Briscoe, D. Bulumulla, V. D. Burkert, D. S. Carman, P. Chatagnon, V. Chesnokov, T. Chetry, G. Ciullo, P. L. Cole, M. Contalbrigo, G. Costantini, A. D'Angelo, N. Dashyan, R. De Vita, M. Defurne, A. Deur, S. Diehl, C. Djalali, H. Egiyan, L. Elouadrhiri, P. Eugenio, R. Fersch, A. Filippi, G. Gavalian, Y. Ghandilyan, G. P. Gilfoyle, A. A. Golubenko, R. W. Gothe, K. A. Griffioen, M. Guidal, M. Hattawy, F. Hauenstein, T. B. Hayward, D. Heddle, K. Hicks, A. Hobart, M. Holtrop, Y. Ilieva, D. G. Ireland, E. L. Isupov, H. S. Jo, D. Keller, A. Khanal, M. Khandaker, W. Kim, F. J. Klein, A. Kripko, V. Kubarovsky, S. E. Kuhn, L. Lanza, M. Leali, P. Lenisa, K. Livingston, I. J. D. MacGregor, D. Marchand, L. Marsicano, V. Mascagna, B. McKinnon, C. McLauchlin, Z. E. Meziani, S. Migliorati, M. Mirazita, V. Mokeev, C. Munoz Camacho, P. Nadel-Turonski, K. Neupane, S. Niccolai, G. Niculescu, T. R. O'Connell, M. Osipenko, A. I. Ostrovidov, M. Ouillon, P. Pandey, M. Paolone, L. L. Pappalardo, E. Pasyuk, W. Phelps, O. Pogorelko, J. Poudel, J. W. Price, Y. Prok, B. A. Raue, Trevor Reed, M. Ripani, J. Ritman, A. Rizzo, G. Rosner, J. Rowley, F. Sabatie, C. Salgado, A. Schmidt, R. A. Schumacher, Y. G. Sharabian, E. V. Shirokov, U. Shrestha, D. Sokhan, O. Soto, N. Sparveris, S. Stepanyan, I. I. Strakovsky, S. Strauch, R. Tyson, M. Ungaro, L. Venturelli, H. Voskanyan, A. Vossen, E. Voutier, D. P. Watts, Kevin Wei, X. Wei, L. B. Weinstein, R. Wishart, M. H. Wood, B. Yale, N. Zachariou, J. Zhang, Z. W. Zhao

Summary: The study compared the nuclear and kinematic dependence of pion production by conducting semi-inclusive deep-inelastic scattering experiments on deuterium, carbon, iron, and lead targets. The results showed different dependencies of pion multiplicity ratios on carbon, iron, and lead targets, which will strongly constrain the kinematic and flavor dependence of nuclear effects in hadron production.

PHYSICAL REVIEW C (2022)

暂无数据