An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab

Accardi, Alberto; Afanasev, Andrei; Albayrak, I.; Ali, S.; Amaryan, M. J.; Annand, J. R. M.; Arrington, J.; Asaturyan, A.; Atac, H.; Avakian, H.; Averett, T.; Gayoso, C. Ayerbe; Bai, X.; Barion, L.; Battaglieri, M.; Bellini, Vincenzo; Beminiwattha, R.; Benmokhtar, F.; Berdnikov, V. V.; Bernauer, J. C.; Bertone, Valerio; Bianconi, A.; Biselli, A. S.; Bisio, P.; Blunden, P. G.; Boër, M.; Bondí, M.; Brinkmann, K.-Th.; Briscoe, W. J.; Burkert, Volker; Cao, T.; Camsonne, A.; Capobianco, R.; Cardman, L.; Carmignotto, M.; Caudron, M.; Causse, L.; Celentano, A.; Chatagnon, P.; Chen, J.-P.; Chetry, T.; Ciullo, G.; Cline, E.; Cole, P. L.; Contalbrigo, M.; Costantini, G.; d’Angelo, A.; Darmé, Luc; Day, D.; Defurne, M.; Napoli, M. De; Deur, A.; Vita, R. De; d’Hose, N.; Diehl, Stefan; Diefenthaler, M.; Dongwi, B.; Dupré, R.; Dutrieux, H.; Dutta, D.; Ehrhart, M.; Fassi, L. El; Elouadrhiri, L.; Ent, R.; Erler, Jens; Fernando, Ishara P.; Filippi, A.; Flay, D.; Forest, T. A.; Fuchey, E.; Fucini, Sara; Furletova, Y.; H, Gao; Gaskell, D.; Gasparian, A.; Gautam, T.; Girod, F. X.; Gnanvo, K.; Grames, Joseph; Grauvogel, G. N.; Guèye, P.; Guidal, M.; Habet, S.; Hague, T.; Hamilton, D.; Hansen, J. O.; Hasell, D.; Hattawy, M.; Higinbotham, D. W.; Hobart, A.; Horn, T.; Hyde, Charles; Ibrahim, H.; Ilyichev, A.; Italiano, A.; Joo, K. S.; Joosten, S.; Khachatryan, V.; Kalantarians, N.; Kalicy, G.; Karky, B.; Keller, D.; Keppel, C.; Kerver, M.; Khandaker, M.; Kim, A.; Kim, J.; King, Paul M.; Kinney, E.; Klimenko, V.; Ko, H.-S.; Köhl, M.; Kozhuharov, V.; Kriesten, Brandon; Krnjaic, Gordan; Kubarovsky, V.; Kutz, T.; Lanza, L.; Leali, M.; Lenisa, P.; Liyanage, N.; Liu, Q.; Liuti, Simonetta; Mammei, J.; Mantry, Sonny; Marchand, D.; Markowitz, P.; Marsicano, L.; Mascagna, V.; Mazouz, M.; McCaughan, M.; McKinnon, B.; McNulty, D.; Melnitchouk, W.; Metz, Andreas; Meziani, Z. E.; Migliorati, S.; Mihovilovič, M.; Milner, R.; Mkrtchyan, A.; Mkrtchyan, H.; Movsisyan, A.; Moutarde, H.; Muhoza, M.; Camacho, C. Muñoz; Murphy, J. J.; Nadel-Turoński, P.; Nardi, Enrico; Nazeer, J.; Niccolai, S.; Niculescu, G.; Novotny, R.; Owens, J.F.; Paolone, M.; Pappalardo, L. L.; Paremuzyan, R.; Pasquini, B.; Pasyuk, E.; Patel, Tanvi; Pegg, Ian L.; Peng, C.; Perera, D.; Poelker, M.; Price, K.; Puckett, A. J. R.; Raggi, M.; Randazzo, N.; Rashad, M. N. H.; Rathnayake, Malinga; Raue, B. A.; Reimer, P.; Rinaldi, Matteo; Rizzo, A.; Roblin, Y.; Roche, J.; Rondon-Aramayo, O.; Sabatié, F.; Salmè, G.; Santopinto, E.; Estrada, R. Santos; Sawatzky, B.; Schmidt, Axel; Schweitzer, P.; Scopetta, Sergio; Sergeyeva, V.; Shabestari, M.; Shahinyan, A.; Sharabian, Y. G.; Širca, S.; Smith, E. S.; Sokhan, D.; Somov, A.; Sparveris, N.; Spata, M.; Spiesberger, H.; Spreafico, M.; Stepanyan, S.; Stoler, P.; Strakovsky, I. I.; Suleiman, R.; Suresh, M.; Sznajder, P.; Szumila-Vance, Holly; Tadevosyan, V.; Tadepalli, A. S.; Thomas, A. W.; Tiefenback, Michael; Trotta, R.; Ungaro, M.; Valente, P.; Vanderhaeghen, Marc; Venturelli, L.; Voskanyan, H.; Voutier, E.; Wojtsekhowski, B.; Wood, M. H.; Wood, S. A.; Xie, Ju Jun; Xiong, Weizhi; Ye, Z.; Yurov, M.; Zaunick, H.-G.; Zhamkochyan, S.; Zhang, J.; Zhang, S.; Zhao, Shengying; Zhao, Zhiwen; Zheng, X.; Zhou, Jingyi; Zorn, C.

doi:10.1140/epja/s10050-021-00564-y

Cited by 22 publications

(10 citation statements)

References 191 publications

(169 reference statements)

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“…According to the results obtained in this paper, we emphasis that in order to get more universal GPDs, especially of E q v , it is necessary to include more precise experimental data in the analysis. In this regard, the future programs like one that will be done at Jefferson Lab [45] can shed new lights on the determination of GPDs.…”

Section: Discussionmentioning

confidence: 99%

Determination of the generalized parton distributions through the analysis of the world electron scattering data considering two-photon exchange corrections

Hashamipour,

Goharipour,

Azizi

et al. 2021

Preprint

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We determine the valence generalized parton distributions (GPDs) H q v and E q v with their uncertainties at zero skewness by performing a χ 2 analysis of the world electron scattering data considering two-photon exchange corrections. The data include a wide and updated range of the electric and magnetic form factors (FFs) of the proton and neutron. As a result, we find that there are no enough constraints on GPDs E q v from FFs data solely though H q v are well constrained. By including the new data of the charge and magnetic radius of the nucleon in the analysis, we show that they put new constraints on the final GPDs, especially on E q v . Moreover, we calculate the gravitational FF M2 and the total angular momentum J q using the extracted GPDs and compare them with the FFs obtained from the light-cone QCD sum rules (LCSR) and Lattice QCD. We show that our results are interestingly in a good consistency with the pure theoretical predictions.

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Section: Discussionmentioning

confidence: 99%

Determination of the generalized parton distributions through the analysis of the world electron scattering data considering two-photon exchange corrections

Hashamipour,

Goharipour,

Azizi

et al. 2021

Preprint

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show abstract

“…We now investigate the prospects of searching the light scalar present in this theory in different intensity and lifetime frontier experiments and therefore probing the DM parameter space in turn, thanks to the underlying scale invarinace. Dark sectors with light degrees of freedom can be probed with a variety of experiments at the luminosity frontier, including proton [150][151][152][153][154][155][156][157][158][159][160][161][162], electron [163][164][165][166][167][168][169][170] and positron fixed target facilities [171,172] 7 . These experiments are capable of probing extremely small mixing angles at great accuracy.…”

Section: Laboratory Probe For Non-standard Cosmologymentioning

confidence: 99%

Probing pre-BBN era with Scale Invarint FIMP

Barman¹,

Ghoshal²

2022

Preprint

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Detecting dark matter (DM) relic via freeze-in is difficult in laboratories due to smallness of the couplings involved. However, a non-standard cosmological history of the Universe, prior to Big Bang Nucleosynthesis (BBN), can dramatically change this scenario. In this context, we study the freeze-in production of dark matter (DM) in classically scale invariant U (1) X gauge extension of the Standard Model (SM), recently dubbed as the Scale Invariant FIMP Miracle. We assume an additional species dominates the energy density of the Universe at early times, causing the expansion rate at a given temperature to be larger than that in the standard radiation-dominated case. We find, the out-of-equilibrium scattering processes involving particles in the thermal bath lead to significantly suppressed DM production in this era, thereby enhancing the couplings between the visible and the dark sector (by several orders of magnitude) to satisfy the observed DM abundance, and improving the detection prospects for freeze-in in turn. Scale invariance of the underlying theory leaves only four free parameters in the model: the DM mass m X , the gauge coupling g X , the temperature of transition T R from early scalar-dominated to radiation-dominated era and the power-law dependence n of this temperature. We show, within this minimal set-up, experiments like FASER, MATHUSLA, DUNE, SHiP will be probing various cosmological models depending on the choice of {n, T R } that also satisfy the PLANCK observed relic density bound. Moreover, due to the presence of a naturally light scalar mediator, the direct detection of the DM at XENON1T, PandaX-4T or XENONnT becomes relevant for Higgsscalar mixing sin θ {10 −5 − 10 −3 }, thus providing complementary probes for freeze-in, as well as for non-standard cosmological pre-BBN era.

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“…Studies of hadron structure from data obtained in experiments with electromagnetic probes at JLab [1,[26][27][28][29], MAMI [30][31][32][33][34][35], and Babar and Belle [36,37], have provided experimental results that can be confronted with predictions from the QCD-connected approaches to hadron structure. More results are expected from experiments in the ongoing 12-GeV era at JLab [1,[38][39][40] and from planned research programs at the US electron ion collider (EIC) [39,[41][42][43], the electron ion collider in China (EicC) [44,45], and experiments with hadronic probes conducted by the AMBER Collaboration at CERN [46].…”

Section: Introductionmentioning

confidence: 99%