Document Type
Report
Publication Date
2021
Pages
PR12-21-004 (34 pp.)
Abstract
We propose to measure precision ratios of charged pion electroproduction in Semi-Inclusive Deep Inelastic Scattering from ²D, ³He and ³H targets to test the flavor dependence of the EMC effect in the valence quark region. This trio of targets has been chosen to minimize hadron attenuation effects while maximizing nuclear asymmetry. The standard configuration CLAS12 detector will be used in the experiment to detect scattered electrons and knocked-out pions. A new, dedicated, tritium target that will be developed for the approved quasi-elastic experiment, E12-20-005 [1], will be used. The experiment will measure semi-inclusive production of charged pions over a wide range of Bjorken-x variable. It will focus on z =Eπ/v ≥ 0.3 to maximize the connection between the struck quark and the detected π±. Double ratios of the total yields and ratios of the yield differences between A = 3 nuclei to 2D will be formed in order to search for evidence of a flavor dependence in the EMC effect, giving us new data on the effect of the nuclear environment on quarks. Our simulations show that these double ratio variables are most sensitive to potential flavor dependence of the EMC effects. Double ratios between the A = 3 mirror nuclei can also provide a direct measurement of the d/u ratios at large x thanks to their similar and well understood nuclear corrections. While there is a dearth of calculations of flavor dependence for A = 3 nuclei, we expect our data will stimulate a surge of new calculations. In addition to ratios, we will also measure (e, e'π+) and (e, e'π-) cross sections as a function of x, Q², z, PT to allow theorists to extract the unpolarized TMDs, PDFs and fragmentation functions in A = 3 nuclei. If the CLAS12 RICH is available we will also measure flavor-tagged DIS with kaons. This proposal builds on PR12-09-004, a proposal to observe the ratio of gold to deuterium that was determined to have too many nuclear uncertainties. By using ratios of light nuclei, we maintain the sensitivity to the underlying physics but dramatically decrease the nuclear uncertainties due to attenuation and hadronization in heavy nuclei. This experiment is very timely because it will extend the newly published inclusive MARATHON studies of ³H and ³He to the semi-exclusive regime by flavor-tagging the struck quarks.
Rights
© 2021 The Authors.
Included with the kind written permission of the authors.
Original Publication Citation
Li, S., Cruz Torres, R., Rittenhouse West, J., Yuan, F., Denniston, A., Hen, O., Kahlbow, J., Kutz, T., Ayerbe-Gayoso, C., Bhatt, H., Bhetuwal, D., Chetry, T., Devkota, B., Dunne, J., Dutta, D., El Fassi, L., Gaballah, T., Karki, A., Amarian, M.,…Brooks, W. (2021). Semi-inclusive deep inelastic scattering measurements of A = 3 nuclei with CLAS12 in Hall B (Report No. PR12-21-004). Thomas Jefferson National Accelerator Facility.
ORCID
0000-0002-1265-2212 (Hauenstein), 0000-0001-7282-8120 (Hyde)
Repository Citation
Li, S.; Cruz Torres, R.; Rittenhouse West, J.; Yuan, F.; Denniston, A.; Hen, O.; Kahlbow, J.; Kutz, T.; Pybus, J. R.; Segarra, E. P.; Ayerbe-Gayoso, C.; Bhatt, H.; Bhetuwal, D.; Chetry, T.; Devkota, B.; Dunne, J.; Dutta, D.; Fassi, L. El; Gaballah, T.; Karki, A.; Amarian, M.; Fogler, C.; Hauenstein, F.; Hyde, C.; Gavalian, G.; Weinstein, L. B.; Gaskell, D.; Higinbotham, D. W.; Keith, C.; Keppel, C.; Maxwell, J.; Tadepalli, A.; Meekins, D.; Nguyen, D.; Stepanyan, S.; Szumila-Vance, H.; Xiao, Z. G.; Wang, Y.; Ye, Z. H.; Zhang, Y. P.; Griffioen, K.; Bosted, P.; Bianconi, A.; Costantini, G.; Leali, M.; Migliorati, S.; Venturelli, L.; Mascagna, V.; Boyer, A; Benmokhtar, F.; Gadsby, A.; Parker, A.; Baashen, L.; Raue, B.; Briscoe, W. J.; Ratliff, S.; Schmidt, A.; Seroka, E.; Sharp, P.; Solazzo, P. G.; Strakovsky, I. I.; Adhikari, K.; Niculescu, G.; Brinkmann, K.-T.; Diehl, S.; Kripko, A.; Alsalmi, Sheren; Hague, Tyler J.; Beck, A.; Beck, S.; Cohen, E.; Korover, I.; Johansson, G.; Neuburger, C.; Piasetzky, E.; Nycz, Michael; Capobianco, R.; Haywars, T.; Girod, F.-X.; Joo, K.; Kim, A.; Klimenko, V.; Santos, R.; Shrestha, U.; Simmerling, P.; Richard, J.; Trotta, N.; McKinnon, B.; and Brooks, W., "Semi-Inclusive Deep Inelastic Scattering Measurements of A = 3 Nuclei With CLAS12 in HALL B" (2021). Physics Faculty Publications. 933.
https://digitalcommons.odu.edu/physics_fac_pubs/933
Comments
A work of the CLAS Collaboration.
Link to publisher landing page: https://www.jlab.org/exp_prog/proposals/21prop.html