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11 results on '"Alsalmi, S"'

1. Novel Measurement of the Neutron Magnetic Form Factor from A=3 Mirror Nuclei

Author

Santiesteban, SN, Li, S, Abrams, D, Alsalmi, S, Androic, D, Aniol, K, Arrington, J, Averett, T, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Beck, A, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Camsonne, A, Castellanos, J, Chen, J, Chen, J-P, Chrisman, D, Christy, ME, Clarke, C, Covrig, S, Cruz-Torres, R, Day, D, Dutta, D, Fuchey, E, Gal, C, Garibaldi, F, Gautam, TN, Gogami, T, Gomez, J, Guèye, P, Hague, TJ, Hansen, JO, Hauenstein, F, Henry, W, Higinbotham, DW, Holt, RJ, Hyde, C, Itabashi, K, Kaneta, M, Karki, A, Katramatou, AT, Keppel, CE, King, PM, Kurbany, L, Kutz, T, Lashley-Colthirst, N, Li, WB, Liu, H, Liyanage, N, Long, E, Lovato, A, Mammei, J, Markowitz, P, McClellan, RE, Meddi, F, Meekins, D, Michaels, R, Mihovilovič, M, Moyer, A, Nagao, S, Nguyen, D, Nycz, M, Olson, M, Ou, L, Owen, V, Palatchi, C, Pandey, B, Papadopoulou, A, Park, S, Petkovic, T, Premathilake, S, Punjabi, V, Ransome, RD, Reimer, PE, Reinhold, J, Riordan, S, Rocco, N, Rodriguez, VM, Schmidt, A, Schmookler, B, Segarra, EP, Shahinyan, A, Širca, S, Slifer, K, Solvignon, P, Su, T, Suleiman, R, Tang, L, Tian, Y, Tireman, W, Tortorici, F, Toyama, Y, Uehara, K, Urciuoli, GM, and Votaw, D

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Jefferson Lab Hall A Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

The electromagnetic form factors of the proton and neutron encode information on the spatial structure of their charge and magnetization distributions. While measurements of the proton are relatively straightforward, the lack of a free neutron target makes measurements of the neutron's electromagnetic structure more challenging and more sensitive to experimental or model-dependent uncertainties. Various experiments have attempted to extract the neutron form factors from scattering from the neutron in deuterium, with different techniques providing different, and sometimes large, systematic uncertainties. We present results from a novel measurement of the neutron magnetic form factor using quasielastic scattering from the mirror nuclei ^{3}H and ^{3}He, where the nuclear effects are larger than for deuterium but expected to largely cancel in the cross-section ratios. We extracted values of the neutron magnetic form factor for low-to-modest momentum transfer, 0.6

Published
2024

2. First Measurement of the EMC effect in B10 and B11

Author

Karki, A, Biswas, D, Gonzalez, FA, Henry, W, Morean, C, Nadeeshani, A, Sun, A, Abrams, D, Ahmed, Z, Aljawrneh, B, Alsalmi, S, Ambrose, R, Androic, D, Armstrong, W, Arrington, J, Asaturyan, A, Assumin-Gyimah, K, Gayoso, C Ayerbe, Bandari, A, Bane, J, Barrow, J, Basnet, S, Berdnikov, V, Bhatt, H, Bhetuwal, D, Boeglin, WU, Bosted, P, Brash, E, Bukhari, MHS, Chen, H, Chen, JP, Chen, M, Christy, ME, Covrig, S, Craycraft, K, Danagoulian, S, Day, D, Diefenthaler, M, Dlamini, M, Dunne, J, Duran, B, Dutta, D, Elliott, C, Ent, R, Fenker, H, Fomin, N, Fuchey, E, Gaskell, D, Gautam, TN, Hansen, JO, Hauenstein, F, Hernandez, AV, Horn, T, Huber, GM, Jones, MK, Joosten, S, Kabir, ML, Kalantarians, N, Keppel, C, Khanal, A, King, PM, Kinney, E, Ko, HS, Kohl, M, Lashley-Colthirst, N, Li, S, Li, WB, Liyanage, AH, Mack, D, Malace, S, Markowitz, P, Matter, J, Meekins, D, Michaels, R, Mkrtchyan, A, Mkrtchyan, H, Nanda, S, Nguyen, D, Niculescu, G, Niculescu, I, Nuruzzaman, Pandey, B, Park, S, Pooser, E, Puckett, AJR, Rehfuss, M, Reinhold, J, Santiesteban, N, Sawatzky, B, Smith, GR, Szumila-Vance, H, Tadepalli, AS, Tadevosyan, V, Trotta, R, Wood, SA, Yero, C, and Zhang, J

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Nuclear and plasma physics
Abstract

The nuclear dependence of the inclusive inelastic electron scattering cross section (the EMC effect) has been measured for the first time in B10 and B11. Previous measurements of the EMC effect in A≤12 nuclei showed an unexpected nuclear dependence; B10 and B11 were measured to explore the EMC effect in this region in more detail. Results are presented for Be9, B10, B11, and C12 at an incident beam energy of 10.6 GeV. The EMC effect in the boron isotopes was found to be similar to that for Be9 and C12, yielding almost no nuclear dependence in the EMC effect in the range A=4-12. This represents important new data supporting the hypothesis that the EMC effect depends primarily on the local nuclear environment due to the cluster structure of these nuclei.

Published
2023

3. Revealing the short-range structure of the mirror nuclei 3H and 3He

Author

Li, S, Cruz-Torres, R, Santiesteban, N, Ye, ZH, Abrams, D, Alsalmi, S, Androic, D, Aniol, K, Arrington, J, Averett, T, Gayoso, C Ayerbe, Bane, J, Barcus, S, Barrow, J, Beck, A, Bellini, V, Bhatt, H, Bhetuwal, D, Biswas, D, Bulumulla, D, Camsonne, A, Castellanos, J, Chen, J, Chen, J-P, Chrisman, D, Christy, ME, Clarke, C, Covrig, S, Craycraft, K, Day, D, Dutta, D, Fuchey, E, Gal, C, Garibaldi, F, Gautam, TN, Gogami, T, Gomez, J, Guèye, P, Habarakada, A, Hague, TJ, Hansen, JO, Hauenstein, F, Henry, W, Higinbotham, DW, Holt, RJ, Hyde, C, Itabashi, T, Kaneta, M, Karki, A, Katramatou, AT, Keppel, CE, Khachatryan, M, Khachatryan, V, King, PM, Korover, I, Kurbany, L, Kutz, T, Lashley-Colthirst, N, Li, WB, Liu, H, Liyanage, N, Long, E, Mammei, J, Markowitz, P, McClellan, RE, Meddi, F, Meekins, D, Beck, S Mey-Tal, Michaels, R, Mihovilovič, M, Moyer, A, Nagao, S, Nelyubin, V, Nguyen, D, Nycz, M, Olson, M, Ou, L, Owen, V, Palatchi, C, Pandey, B, Papadopoulou, A, Park, S, Paul, S, Petkovic, T, Pomatsalyuk, R, Premathilake, S, Punjabi, V, Ransome, RD, Reimer, PE, Reinhold, J, Riordan, S, Roche, J, Rodriguez, VM, Schmidt, A, Schmookler, B, Segarra, EP, Shahinyan, A, Slifer, K, Solvignon, P, and Širca, S

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, General Science & Technology
Abstract

When protons and neutrons (nucleons) are bound into atomic nuclei, they are close enough to feel significant attraction, or repulsion, from the strong, short-distance part of the nucleon-nucleon interaction. These strong interactions lead to hard collisions between nucleons, generating pairs of highly energetic nucleons referred to as short-range correlations (SRCs). SRCs are an important but relatively poorly understood part of nuclear structure1-3, and mapping out the strength and the isospin structure (neutron-proton (np) versus proton-proton (pp) pairs) of these virtual excitations is thus critical input for modelling a range of nuclear, particle and astrophysics measurements3-5. Two-nucleon knockout or 'triple coincidence' reactions have been used to measure the relative contribution of np-SRCs and pp-SRCs by knocking out a proton from the SRC and detecting its partner nucleon (proton or neutron). These measurements6-8 have shown that SRCs are almost exclusively np pairs, but they had limited statistics and required large model-dependent final-state interaction corrections. Here we report on measurements using inclusive scattering from the mirror nuclei hydrogen-3 and helium-3 to extract the np/pp ratio of SRCs in systems with a mass number of three. We obtain a measure of the np/pp SRC ratio that is an order of magnitude more precise than previous experiments, and find a marked deviation from the near-total np dominance observed in heavy nuclei. This result implies an unexpected structure in the high-momentum wavefunction for hydrogen-3 and helium-3. Understanding these results will improve our understanding of the short-range part of the nucleon-nucleon interaction.

Published
2022

4. Deeply Virtual Compton Scattering Cross Section at High Bjorken x_{B}.

Author

Georges, F, Rashad, MNH, Stefanko, A, Dlamini, M, Karki, B, Ali, SF, Lin, P-J, Ko, H-S, Israel, N, Adikaram, D, Ahmed, Z, Albataineh, H, Aljawrneh, B, Allada, K, Allison, S, Alsalmi, S, Androic, D, Aniol, K, Annand, J, Atac, H, Averett, T, Ayerbe Gayoso, C, Bai, X, Bane, J, Barcus, S, Bartlett, K, Bellini, V, Beminiwattha, R, Bericic, J, Biswas, D, Brash, E, Bulumulla, D, Campbell, J, Camsonne, A, Carmignotto, M, Castellano, J, Chen, C, Chen, J-P, Chetry, T, Christy, ME, Cisbani, E, Clary, B, Cohen, E, Compton, N, Cornejo, JC, Covrig Dusa, S, Crowe, B, Danagoulian, S, Danley, T, De Persio, F, Deconinck, W, Defurne, M, Desnault, C, Di, D, Duer, M, Duran, B, Ent, R, Fanelli, C, Franklin, G, Fuchey, E, Gal, C, Gaskell, D, Gautam, T, Glamazdin, O, Gnanvo, K, Gray, VM, Gu, C, Hague, T, Hamad, G, Hamilton, D, Hamilton, K, Hansen, O, Hauenstein, F, Henry, W, Higinbotham, DW, Holmstrom, T, Horn, T, Huang, Y, Huber, GM, Hyde, CE, Ibrahim, H, Jen, C-M, Jin, K, Jones, M, Kabir, A, Keppel, C, Khachatryan, V, King, PM, Li, S, Li, WB, Liu, J, Liu, H, Liyanage, A, Magee, J, Malace, S, Mammei, J, Markowitz, P, McClellan, E, Mazouz, M, and Meddi, F

Subjects
Jefferson Lab Hall A Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We report high-precision measurements of the deeply virtual Compton scattering (DVCS) cross section at high values of the Bjorken variable x_{B}. DVCS is sensitive to the generalized parton distributions of the nucleon, which provide a three-dimensional description of its internal constituents. Using the exact analytic expression of the DVCS cross section for all possible polarization states of the initial and final electron and nucleon, and final state photon, we present the first experimental extraction of all four helicity-conserving Compton form factors (CFFs) of the nucleon as a function of x_{B}, while systematically including helicity flip amplitudes. In particular, the high accuracy of the present data demonstrates sensitivity to some very poorly known CFFs.

Published
2022

5. Measurement of the Nucleon F2n/F2p Structure Function Ratio by the Jefferson Lab MARATHON Tritium/Helium-3 Deep Inelastic Scattering Experiment

Author

Abrams, D, Albataineh, H, Aljawrneh, BS, 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, EO, Covrig, S, Craycraft, K, Cruz-Torres, R, Dongwi, B, Duran, B, Dutta, D, Fuchey, E, Gal, C, Gautam, TN, Gilad, S, Gnanvo, K, Gogami, T, Gomez, J, Gu, C, Habarakada, A, Hague, T, Hansen, J-O, Hattawy, M, Hauenstein, F, Higinbotham, DW, Holt, RJ, Hughes, EW, Hyde, C, Ibrahim, H, Jian, S, Joosten, S, Karki, A, Karki, B, Katramatou, AT, Keith, C, Keppel, C, Khachatryan, M, Khachatryan, V, Khanal, A, Kievsky, A, King, D, King, PM, Korover, I, Kulagin, SA, Kumar, KS, Kutz, T, Lashley-Colthirst, N, Li, S, Li, W, Liu, H, Liuti, S, Liyanage, N, Markowitz, P, McClellan, RE, 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, VF, Pace, E, Pandey, B, Pandey, V, Paolone, M, Papadopoulou, A, Park, S, Paul, S, Petratos, GG, Petti, R, Piasetzky, E, and Pomatsalyuk, R

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Jefferson Lab Hall A Tritium Collaboration, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
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

Published
2022

6. Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering

Author

Christy, ME, Gautam, T, Ou, L, Schmookler, B, Wang, Y, Adikaram, D, Ahmed, Z, Albataineh, H, Ali, SF, Aljawrneh, B, Allada, K, Allison, SL, Alsalmi, S, Androic, D, Aniol, K, Annand, J, Arrington, J, Atac, H, Averett, T, Gayoso, C Ayerbe, Bai, X, Bane, J, Barcus, S, Bartlett, K, Bellini, V, Beminiwattha, R, Bericic, J, Bhatt, H, Bhetuwal, D, Biswas, D, Brash, E, Bulumulla, D, Camacho, CM, Campbell, J, Camsonne, A, Carmignotto, M, Castellanos, J, Chen, C, Chen, J-P, Chetry, T, Cisbani, E, Clary, B, Cohen, E, Compton, N, Cornejo, JC, Dusa, S Covrig, Crowe, B, Danagoulian, S, Danley, T, Deconinck, W, Defurne, M, Desnault, C, Di, D, Dlamini, M, Duer, M, Duran, B, Ent, R, Fanelli, C, Fuchey, E, Gal, C, Gaskell, D, Georges, F, Gilad, S, Glamazdin, O, Gnanvo, K, Gramolin, AV, Gray, VM, Gu, C, Habarakada, A, Hague, T, Hamad, G, Hamilton, D, Hamilton, K, Hansen, O, Hauenstein, F, Hernandez, AV, Henry, W, Higinbotham, DW, Holmstrom, T, Horn, T, Huang, Y, Huber, GM, Hyde, C, Ibrahim, H, Israel, N, Jen, C-M, Jin, K, Jones, M, Kabir, A, Karki, B, Keppel, C, Khachatryan, V, King, PM, Li, S, Li, W, Liu, H, Liu, J, Liyanage, AH, Mack, D, and Magee, J

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75  (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q^{2} and double the range over which a longitudinal or transverse separation of the cross section can be performed. The difference between our results and polarization data agrees with that observed at lower Q^{2} and attributed to hard two-photon exchange (TPE) effects, extending to 8  (GeV/c)^{2} the range of Q^{2} for which a discrepancy is established at >95% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q^{2}.

Published
2022

7. Deep Exclusive Electroproduction of π0 at High Q2 in the Quark Valence Regime

Author

Dlamini, M, Karki, B, Ali, SF, Lin, P-J, Georges, F, Ko, H-S, Israel, N, Rashad, MNH, Stefanko, A, Adikaram, D, Ahmed, Z, Albataineh, H, Aljawrneh, B, Allada, K, Allison, S, Alsalmi, S, Androic, D, Aniol, K, Annand, J, Atac, H, Averett, T, Ayerbe Gayoso, C, Bai, X, Bane, J, Barcus, S, Bartlett, K, Bellini, V, Beminiwattha, R, Bericic, J, Biswas, D, Brash, E, Bulumulla, D, Campbell, J, Camsonne, A, Carmignotto, M, Castellano, J, Chen, C, Chen, J-P, Chetry, T, Christy, ME, Cisbani, E, Clary, B, Cohen, E, Compton, N, Cornejo, JC, Covrig Dusa, S, Crowe, B, Danagoulian, S, Danley, T, De Persio, F, Deconinck, W, Defurne, M, Desnault, C, Di, D, Duer, M, Duran, B, Ent, R, Fanelli, C, Franklin, G, Fuchey, E, Gal, C, Gaskell, D, Gautam, T, Glamazdin, O, Gnanvo, K, Gray, VM, Gu, C, Hague, T, Hamad, G, Hamilton, D, Hamilton, K, Hansen, O, Hauenstein, F, Henry, W, Higinbotham, DW, Holmstrom, T, Horn, T, Huang, Y, Huber, GM, Hyde, C, Ibrahim, H, Jen, C-M, Jin, K, Jones, M, Kabir, A, Keppel, C, Khachatryan, V, King, PM, Li, S, Li, W, Liu, J, Liu, H, Liyanage, A, Magee, J, Malace, S, Mammei, J, Markowitz, P, McClellan, E, Meddi, F, and Meekins, D

Subjects
Jefferson Lab Hall A Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We report measurements of the exclusive neutral pion electroproduction cross section off protons at large values of x_{B} (0.36, 0.48, and 0.60) and Q^{2} (3.1 to 8.4  GeV^{2}) obtained from Jefferson Lab Hall A experiment E12-06-014. The corresponding structure functions dσ_{T}/dt+εdσ_{L}/dt, dσ_{TT}/dt, dσ_{LT}/dt, and dσ_{LT^{'}}/dt are extracted as a function of the proton momentum transfer t-t_{min}. The results suggest the amplitude for transversely polarized virtual photons continues to dominate the cross section throughout this kinematic range. The data are well described by calculations based on transversity generalized parton distributions coupled to a helicity flip distribution amplitude of the pion, thus providing a unique way to probe the structure of the nucleon.

Published
2021

8. Measurement of the Ar(e,e′p) and Ti(e,e′p) cross sections in Jefferson Lab Hall A

Author

Gu, L, Abrams, D, Ankowski, AM, Jiang, L, Aljawrneh, B, Alsalmi, S, Bane, J, Batz, A, Barcus, S, Barroso, M, Benhar, O, Bellini, V, Bericic, J, Biswas, D, Camsonne, A, Castellanos, J, Chen, J-P, Christy, ME, Craycraft, K, Cruz-Torres, R, Dai, H, Day, D, Dusa, S-C, Fuchey, E, Gautam, T, Giusti, C, Gomez, J, Gu, C, Hague, T, Hansen, J-O, Hauenstein, F, Higinbotham, DW, Hyde, C, Keppel, C, Li, S, Lindgren, R, Liu, H, Mariani, C, McClellan, RE, Meekins, D, Michaels, R, Mihovilovic, M, Murphy, M, Nguyen, D, Nycz, M, Ou, L, Pandey, B, Pandey, V, Park, K, Perera, G, Puckett, AJR, Santiesteban, SN, Širca, S, Su, T, Tang, L, Tian, Y, Ton, N, Wojtsekhowski, B, Wood, S, Ye, Z, and Zhang, J

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, nucl-ex, nucl-th, Nuclear and plasma physics
Abstract

The E12-14-012 experiment, performed in Jefferson Lab Hall A, has collected exclusive electron-scattering data (e,e′p) in parallel kinematics using natural argon and natural titanium targets. Here we report the first results of the analysis of the data set corresponding to beam energy 2222 GeV, electron scattering angle 21.5∘, and proton emission angle -50∘. The differential cross sections, measured with ≈4% uncertainty, have been studied as a function of missing energy and missing momentum, and compared to the results of Monte Carlo simulations, obtained from a model based on the distorted-wave impulse approximation.

Published
2021

9. Probing Few-Body Nuclear Dynamics via H3 and He3 (e,e′p)pn Cross-Section Measurements

Author

Cruz-Torres, R, Nguyen, D, Hauenstein, F, Schmidt, A, Li, S, Abrams, D, Albataineh, H, 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, Benmokhtar, F, Bhatt, H, Bhetuwal, D, Biswas, D, Blyth, D, Boeglin, W, Bulumulla, D, Camsonne, A, Castellanos, J, Chen, J-P, Cohen, EO, Covrig, S, Craycraft, K, Dongwi, B, Duer, M, Duran, B, Dutta, D, Fuchey, E, Gal, C, Gautam, TN, Gilad, S, Gnanvo, K, Gogami, T, Golak, J, Gomez, J, Gu, C, Habarakada, A, Hague, T, Hansen, O, Hattawy, M, Hen, O, Higinbotham, DW, Hughes, E, Hyde, C, Ibrahim, H, Jian, S, Joosten, S, Kamada, H, Karki, A, Karki, B, Katramatou, AT, Keppel, C, Khachatryan, M, Khachatryan, V, Khanal, A, King, D, King, P, Korover, I, Kutz, T, Lashley-Colthirst, N, Laskaris, G, Li, W, Liu, H, Liyanage, N, Markowitz, P, McClellan, RE, Meekins, D, Beck, S Mey-Tal, Meziani, Z-E, Michaels, R, Mihovilovič, M, Nelyubin, V, Nuruzzaman, N, Nycz, M, Obrecht, R, Olson, M, Ou, L, Owen, V, Pandey, B, Pandey, V, Papadopoulou, A, Park, S, Patsyuk, M, Paul, S, Petratos, GG, Piasetzky, E, Pomatsalyuk, R, Premathilake, S, Puckett, AJR, and Punjabi, V

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Jefferson Lab Hall A Tritium Collaboration, nucl-ex, nucl-th, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

We report the first measurement of the (e,e^{'}p) three-body breakup reaction cross sections in helium-3 (^{3}He) and tritium (^{3}H) at large momentum transfer [⟨Q^{2}⟩≈1.9  (GeV/c)^{2}] and x_{B}>1 kinematics, where the cross section should be sensitive to quasielastic (QE) scattering from single nucleons. The data cover missing momenta 40≤p_{miss}≤500  MeV/c that, in the QE limit with no rescattering, equals the initial momentum of the probed nucleon. The measured cross sections are compared with state-of-the-art ab initio calculations. Overall good agreement, within ±20%, is observed between data and calculations for the full p_{miss} range for ^{3}H and for 100≤p_{miss}≤350  MeV/c for ^{3}He. Including the effects of rescattering of the outgoing nucleon improves agreement with the data at p_{miss}>250  MeV/c and suggests contributions from charge-exchange (SCX) rescattering. The isoscalar sum of ^{3}He plus ^{3}H, which is largely insensitive to SCX, is described by calculations to within the accuracy of the data over the entire p_{miss} range. This validates current models of the ground state of the three-nucleon system up to very high initial nucleon momenta of 500  MeV/c.

Published
2020

10. Probing Few-Body Nuclear Dynamics via ^{3}H and ^{3}He (e,e^{'}p)pn Cross-Section Measurements.

Author

Cruz-Torres, R, Nguyen, D, Hauenstein, F, Schmidt, A, Li, S, Abrams, D, Albataineh, H, Alsalmi, S, Androic, D, Aniol, K, Armstrong, W, Arrington, J, Atac, H, Averett, T, Ayerbe Gayoso, C, Bai, X, Bane, J, Barcus, S, Beck, A, Bellini, V, Benmokhtar, F, Bhatt, H, Bhetuwal, D, Biswas, D, Blyth, D, Boeglin, W, Bulumulla, D, Camsonne, A, Castellanos, J, Chen, J-P, Cohen, EO, Covrig, S, Craycraft, K, Dongwi, B, Duer, M, Duran, B, Dutta, D, Fuchey, E, Gal, C, Gautam, TN, Gilad, S, Gnanvo, K, Gogami, T, Golak, J, Gomez, J, Gu, C, Habarakada, A, Hague, T, Hansen, O, Hattawy, M, Hen, O, Higinbotham, DW, Hughes, E, Hyde, C, Ibrahim, H, Jian, S, Joosten, S, Kamada, H, Karki, A, Karki, B, Katramatou, AT, Keppel, C, Khachatryan, M, Khachatryan, V, Khanal, A, King, D, King, P, Korover, I, Kutz, T, Lashley-Colthirst, N, Laskaris, G, Li, W, Liu, H, Liyanage, N, Markowitz, P, McClellan, RE, Meekins, D, Mey-Tal Beck, S, Meziani, Z-E, Michaels, R, Mihovilovič, M, Nelyubin, V, Nuruzzaman, N, Nycz, M, Obrecht, R, Olson, M, Ou, L, Owen, V, Pandey, B, Pandey, V, Papadopoulou, A, Park, S, Patsyuk, M, Paul, S, Petratos, GG, Piasetzky, E, Pomatsalyuk, R, Premathilake, S, Puckett, AJR, and Punjabi, V

Subjects
Jefferson Lab Hall A Tritium Collaboration, nucl-ex, nucl-th, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract

We report the first measurement of the (e,e^{'}p) three-body breakup reaction cross sections in helium-3 (^{3}He) and tritium (^{3}H) at large momentum transfer [⟨Q^{2}⟩≈1.9  (GeV/c)^{2}] and x_{B}>1 kinematics, where the cross section should be sensitive to quasielastic (QE) scattering from single nucleons. The data cover missing momenta 40≤p_{miss}≤500  MeV/c that, in the QE limit with no rescattering, equals the initial momentum of the probed nucleon. The measured cross sections are compared with state-of-the-art ab initio calculations. Overall good agreement, within ±20%, is observed between data and calculations for the full p_{miss} range for ^{3}H and for 100≤p_{miss}≤350  MeV/c for ^{3}He. Including the effects of rescattering of the outgoing nucleon improves agreement with the data at p_{miss}>250  MeV/c and suggests contributions from charge-exchange (SCX) rescattering. The isoscalar sum of ^{3}He plus ^{3}H, which is largely insensitive to SCX, is described by calculations to within the accuracy of the data over the entire p_{miss} range. This validates current models of the ground state of the three-nucleon system up to very high initial nucleon momenta of 500  MeV/c.

Published
2020

11. Comparing proton momentum distributions in A = 2 and 3 nuclei via 2H 3H and 3He (e,e′p) measurements

Author

Collaboration, Jefferson Lab Hall A Tritium, Cruz-Torres, R, Li, S, Hauenstein, F, Schmidt, A, Nguyen, D, Abrams, D, Albataineh, H, 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, Camsonne, A, Castellanos, J, Chen, J-P, Cohen, EO, Covrig, S, Craycraft, K, Dongwi, B, Duer, M, Duran, B, Dutta, D, Fuchey, E, Gal, C, Gautam, TN, Gilad, S, Gnanvo, K, Gogami, T, Gomez, J, Gu, C, Habarakada, A, Hague, T, Hansen, O, Hattawy, M, Hen, O, Higinbotham, DW, Hughes, E, Hyde, C, Ibrahim, H, Jian, S, Joosten, S, Karki, A, Karki, B, Katramatou, AT, Keppel, C, Khachatryan, M, Khachatryan, V, Khanal, A, King, D, King, P, Korover, I, Kutz, T, Lashley-Colthirst, N, Laskaris, G, Li, W, Liu, H, Liyanage, N, Lonardoni, D, Machleidt, R, Marcucci, LE, Markowitz, P, McClellan, RE, Meekins, D, Beck, S Mey-Tal, Meziani, Z-E, Michaels, R, Mihovilovič, M, Nelyubin, V, Nuruzzaman, N, Nycz, M, Obrecht, R, Olson, M, Ou, L, Owen, V, Pandey, B, Pandey, V, Papadopoulou, A, Park, S, Patsyuk, M, Paul, S, Petratos, GG, Piasetzky, E, Pomatsalyuk, R, Premathilake, S, and Puckett, AJR

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, nucl-ex, nucl-th, Mathematical Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Mathematical sciences, Physical sciences
Abstract

We report the first measurement of the (e,e′p) reaction cross-section ratios for Helium-3 (He3), Tritium (H3), and Deuterium (d). The measurement covered a missing momentum range of 40≤pmiss≤550MeV/c, at large momentum transfer (〈Q2〉≈1.9 (GeV/c)2) and xB>1, which minimized contributions from non quasi-elastic (QE) reaction mechanisms. The data is compared with plane-wave impulse approximation (PWIA) calculations using realistic spectral functions and momentum distributions. The measured and PWIA-calculated cross-section ratios for He3/d and H3/d extend to just above the typical nucleon Fermi-momentum (kF≈250 MeV/c) and differ from each other by ∼20%, while for He3/H3 they agree within the measurement accuracy of about 3%. At momenta above kF, the measured He3/H3 ratios differ from the calculation by 20%−50%. Final state interaction (FSI) calculations using the generalized Eikonal Approximation indicate that FSI should change the He3/H3 cross-section ratio for this measurement by less than 5%. If these calculations are correct, then the differences at large missing momenta between the He3/H3 experimental and calculated ratios could be due to the underlying NN interaction, and thus could provide new constraints on the previously loosely-constrained short-distance parts of the NN interaction.

Published
2019

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