Measurement of the Neutron<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>F</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>Structure Function via Spectator Tagging with CLAS

Baillie, N.; Tkachenko, S.; Zhang, J.; Bosted, P.; Bültmann, S.; Christy, M. E.; Fenker, H.; Griffioen, K. A.; Keppel, C.; Kuhn, S. E.; Melnitchouk, Wally; Tvaskis, V.; Adhikari, K. P.; Adikaram, D.; Aghasyan, M.; Amaryan, M. J.; Anghinolfi, M.; Arrington, J.; Avakian, H.; Baghdasaryan, H.; Battaglieri, M.; Biselli, A. S.; Branford, D.; Briscoe, W. J.; Brooks, W. K.; Burkert, Volker; Carman, D. S.; Celentano, A.; Chandavar, S.; Charles, G.; Cole, P. L.; Contalbrigo, M.; Credé, V.; D’Angelo, A.; Daniel, A.; Dashyan, N.; Vita, R. De; Sanctis, E. De; Deur, A.; Dey, B.; Djalali, C.; Dodge, G. E.; Domingo, J.; Doughty, D.; Dupré, R.; Dutta, D.; Ent, R.; Egiyan, H.; Alaoui, A. El; Fassi, L. El; Elouadrhiri, L.; Eugenio, P.; Fedotov, G.; Fegan, S.; Fradi, A.; Gabrielyan, M.; Gevorgyan, N.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Gohn, W.; Golovatch, E.; Gothe, R. W.; Graham, L.; Guegan, Baptiste; Guidal, M.; Guler, N.; Guo, L.; Hafidi, K.; Heddle, D.; Hicks, K.; Holtrop, M.; Hungerford, E. V.; Hyde, C.; Ilieva, Y.; Ireland, D. G.; Ispiryan, M.; Isupov, E. L.; Jawalkar, S. S.; Jo, H. S.; Kalantarians, N.; Khandaker, M.; Khetarpal, P.; Kim, A.; Kim, W.; P, King; Klein, A.; Klein, F. J.; Klimenko, A. V.; Kubarovsky, V.; Kuleshov, S. V.; Kvaltine, N. D.; Livingston, K.; Lu, Hoff; MacGregor, I. J. D.; Mao, Y.; Markov, N.; McKinnon, B.; Mineeva, T.; Morrison, B.; Moutarde, H.; Munévar, E.; Nadel-Turoński, P.; Ni, A.; Niccolai, S.; Niculescu, I.; Niculescu, G.; Osipenko, M.; Ostrovidov, A. I.; Pappalardo, L. L.; Park, K.; Park, S.; Pasyuk, E.; Pereira, S. Anefalos; Pisano, S.; Pozdniakov, S.; Price, J. W.; Procureur, S.; Prok, Y.; Protopopescu, D.; Raue, B. A.; Ricco, G.; Rimal, D.; Ripani, M.; Rosner, G.; Rossi, P.; Sabatié, F.; Saini, M. S.; Salgado, C.; Schott, D.; Schumacher, R. A.; Seder, E.; Sharabian, Y. G.; Sober, D. I.; Sokhan, D.; Stepanyan, S.; Stoler, P.; Strauch, S.; Taiuti, M.; Tang, W.; Ungaro, M.; Vineyard, M. F.; Voutier, E.; Watts, D. P.; Weinstein, L. B.; Weygand, D. P.; Wood, M. H.; Zana, L.; Zhao, B.

doi:10.1103/physrevlett.108.142001

Cited by 55 publications

(23 citation statements)

References 30 publications

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“…There is an on-going effort to produce a physics proposal to SoLID experiment to measure PVDIS asymmetries on high Z nuclei (such as 48 Ca). By measuring PVDIS asymmetry on a proton target a set of d/u ratio measurement as a function of x bjk can be extracted independent of any nuclear medium corrections which will provide complementary data to proposed 3 H and 3 He form factor ratio measurements proposed at JLab [8,9]. When transitioning from simple quark parton model (QPM) to QCD based PVDIS asymmetries, the higher order terms in operator product expansion (OPE) must be included that will introduce higher twist (HT) effects to the PVDIS asymmetries [10].…”

Section: Physics Motivationsmentioning

confidence: 99%

Precision Measurements of Parity-Violation in Deep Inelastic Scattering using SoLID

Beminiwattha¹

2016

Proceedings of XXIII International Workshop on Deep-Inelastic Scattering — PoS(DIS2015)

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A new proposal to measure parity violating deep inelastic asymmetry (PVDIS) will provide a precision test of the Standard Model through an unique constraints on axial-vector neutral electronquark effective couplings and a precision measurement of the weak mixing angle. We plan to measure the asymmetry to about 0.5% precision over the Bjoken x from 0.3 to 0.7 where the PV asymmetry is approximately independent of hadronic structure. If any deviations observed, the residual hadronic and new physics contributions in the asymmetry could be separated by kinematic dependence of the PVDIS asymmetry. At the proposed precision level, asymmetry will be sensitive to novel hadronic structure effects including charge symmetry violation (CSV) effects and higher twist effects. Observation of these effects itself will be beneficial to building better theoretical models. A deuterium target will be used for Standard Model tests while a d/u quark distribution ratio measurement is proposed using a hydrogen target. The broad reach in kinematic and high statistical precision at which PVDIS asymmetries are planned to measure, a large angle acceptance, high luminosity, and large azimuthal acceptance device is a necessity. We are proposing a new spectrometer based on a solenoid magnet called Solenoidal Large Intensity Device (SoLID) that will provide broad range of electroweak and QCD physics measurements to be conducted at the Jefferson Laboratory. The apparatus will have set of tracking gas electron multiplier (GEM) detectors, a gas Cerenkov detector, and a sampling electromagnetic calorimeter to provide particle identification. The experiment will be conducted as a high rate counting mode experiment.

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Section: Physics Motivationsmentioning

confidence: 99%

Precision Measurements of Parity-Violation in Deep Inelastic Scattering using SoLID

Beminiwattha¹

2016

Proceedings of XXIII International Workshop on Deep-Inelastic Scattering — PoS(DIS2015)

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“…Moreover, the upcoming tagged DIS (TDIS) experiment at Jefferson Lab [9] plans to take data on the production of leading protons from an effective neutron target in the reaction en → ep X, which, in analogy with the HERA leading neutron leptoproduction, can be described through the exchange of a π − . In the proposed experiment, the effective neutron target will be prepared by tagging spectator protons with momenta between 60 and 400 MeV at backward kinematics in the DIS of the electron from a deuteron nucleus, using the same technique that was developed for the measurement of the neutron structure function in the BONuS experiment at Jefferson Lab [10].…”

Section: Introductionmentioning

confidence: 99%

SU(2) Flavor Asymmetry of the Proton Sea in Chiral Effective Theory

McKenney¹,

Sato

Melnitchouk

et al. 2016

Few-Body Syst

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We refine the computation of thed −ū flavor asymmetry in the proton sea with a complementary effort to reveal the dynamics of pion exchange in high-energy processes. In particular, we discuss the efficacy of pion exchange models to simultaneously describe leading neutron electroproduction at HERA along with thed −ū flavor asymmetry in the proton. A detailed χ 2 analysis of the ZEUS and H1 data, when combined with constraints on the pion flux from Drell-Yan data, allows regions of applicability of one-pion exchange to be delineated. Based on the fit results, we also address a possible estimate for leading proton structure functions in upcoming tagged deep-inelastic scattering experiments at Jefferson Lab on the deuteron with forward protons.

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“…The tagged spectator deuteron process has been measured in two pioneering experiments at Jefferson Lab (JLab). The Deeps experiment [1] measured at proton momenta 300 − 600 MeV, while the BONuS experiment [2,3] measured down to momenta of 70 MeV. Model calculations including the effect of final-state interactions (FSI) are available [4,5].…”

Section: Introductionmentioning

confidence: 99%

Tagged spectator DIS off a polarized spin-1 target

Cosyn¹,

Sargsian²,

Weiß³

2016

Proceedings of XXIV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2016)

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We discuss the process of deep-inelastic electron scattering (DIS) on the polarized deuteron with detection of a nucleon in the nuclear fragmentation region ("spectator tagging"). We cover (a) the general structure of the DIS cross section; (b) the structure functions of the process in the impulse approximation using deuteron light-front wave functions; (c) the extraction of free neutron structure by extracting the residue of observables at the free nucleon pole ("pole extrapolation"). As an application we consider the extraction of the free neutron structure function g 1n through polarized electron scattering on the longitudinally polarized deuteron with proton tagging and on-shell extrapolation in the recoil momentum, possible at an EIC with polarized deuteron beams and forward detectors.

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Measurement of the NeutronF2Structure Function via Spectator Tagging with CLAS

Cited by 55 publications

References 30 publications

Precision Measurements of Parity-Violation in Deep Inelastic Scattering using SoLID

Precision Measurements of Parity-Violation in Deep Inelastic Scattering using SoLID

SU(2) Flavor Asymmetry of the Proton Sea in Chiral Effective Theory

Tagged spectator DIS off a polarized spin-1 target

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