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The challenge of the EMC effect: Existing data and future directions

INTERNATIONAL JOURNAL OF MODERN PHYSICS E (2014)

Journal

INTERNATIONAL JOURNAL OF MODERN PHYSICS E

Volume 23, Issue 8, Pages -

Publisher

WORLD SCIENTIFIC PUBL CO PTE LTD

DOI: 10.1142/S0218301314300136

Keywords

EMF effect; deep inelastic scattering; nucleons in the nucleus

Categories

Physics, Nuclear Physics, Particles & Fields

Funding

United States Department of Energy's Office of Science [DE-AC02-06CH11357, DE-AC05-06OR23177]

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Abstract

Since the discovery that the ratio of inclusive charged lepton (per-nucleon) cross-sections from a nucleus A to the deuteron is not unity - even in deep inelastic scattering kinematics - a great deal of experimental and theoretical effort has gone into understanding the phenomenon. The EMC effect, as it is now known, shows that even in the most extreme kinematic conditions the effects of the nucleon being bound in a nucleus cannot be ignored. In this paper, we collect the most precise data available for various nuclear to deuteron ratios, as well as provide a commentary on the current status of the theoretical understanding of this thirty year old effect.

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Article Astronomy & Astrophysics

Determination of the argon spectral function from (e, e′p) data

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

Summary: The E12-14-012 experiment conducted at Jefferson Lab Hall A measured the (e,e'p) cross section in parallel kinematics using a natural argon target. The analysis of the data set corresponding to a beam energy of 2.222 GeV is reported here, covering a range of missing momentum and missing energy. The agreement between the experimental data and Monte Carlo simulations, which included the effects of final state interactions, was found to be satisfactory. The resulting spectral function will be valuable for interpreting neutrino interactions in liquid argon detectors.

PHYSICAL REVIEW D (2022)

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Article Physics, Nuclear

Spectroscopic study of a possible Λnn resonance and a pair of ΣNN states using the (e, e′ K+) reaction with a tritium target

B. Pandey, L. Tang, T. Gogami, K. N. Suzuki, K. Itabashi, S. Nagao, K. Okuyama, S. N. Nakamura, D. Abrams, I. R. Afnan, T. Akiyama, D. Androic, K. Aniol, T. Averett, C. Ayerbe Gayoso, J. Bane, S. Barcus, J. Barrow, V. Bellini, H. Bhatt, D. Bhetuwal, D. Biswas, A. Camsonne, J. Castellanos, J-P. Chen, J. Chen, S. Covrig, D. Chrisman, R. Cruz-Torres, R. Das, E. Fuchey, C. Gal, B. F. Gibson, K. Gnanvo, F. Garibaldi, T. Gautam, J. Gomez, P. Gueye, T. J. Hague, O. Hansen, W. Henry, F. Hauenstein, D. W. Higinbotham, C. Hyde, M. Kaneta, C. Keppel, T. Kutz, N. Lashley-Colthirst, S. Li, H. Liu, J. Mammei, P. Markowitz, R. E. McClellan, F. Meddi, D. Meekins, R. Michaels, M. Mihovilovic, A. Moyer, D. Nguyen, M. Nycz, V. Owen, C. Palatchi, S. Park, T. Petkovic, S. Premathilake, P. E. Reimer, J. Reinhold, S. Riordan, V. Rodriguez, C. Samanta, S. N. Santiesteban, B. Sawatzky, S. Sirca, K. Slifer, T. Su, Y. Tian, Y. Toyama, K. Uehara, G. M. Urciuoli, D. Votaw, J. Williamson, B. Wojtsekhowski, S. Wood, B. Yale, Z. Ye, J. Zhang, X. Zheng

Summary: A mass spectroscopy experiment was performed at Jefferson Lab, observing possible Lambda nn and Sigma NN states. Further statistical data is needed for definitive identification. The experimentally measured Lambda nn state may provide important information about the Lambda n interaction. Additionally, a A=4 Sigma hypernucleus was found, but the existence of a A=3 Sigma hypernucleus needs confirmation from future experiments.

PHYSICAL REVIEW C (2022)

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Article Physics, Nuclear

Measuring recoiling nucleons from the nucleus with the future Electron Ion Collider

F. Hauenstein, A. Jentsch, J. R. Pybus, A. Kiral, M. D. Baker, Y. Furletova, O. Hen, D. W. Higinbotham, C. Hyde, V Morozov, D. Romanov, L. B. Weinstein

Summary: The study of short range correlated nucleon-nucleon pairs is important for understanding the nuclear ground state. This study simulated quasielastic scattering using the planned Electron Ion Collider (EIC) detector configuration and showed the capability of detecting knocked-out and recoiling nucleons. The results suggest that the EIC can provide valuable data for investigating nucleon correlations.

PHYSICAL REVIEW C (2022)

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Article Physics, Nuclear

Slope parameter of the symmetry energy and the structure of three-particle interactions in nuclear matter

Wolfgang Bentz, Ian C. Cloet

Summary: In the first part, we study the symmetry energy and its slope parameter L for nuclear matter, and derive an exact relation between them. In the second part, we discuss the general structure of three-particle interactions in nuclear matter and analyze their connections to other theories.

PHYSICAL REVIEW C (2022)

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