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Scaling of the F_2 Structure Function in Nuclei and Quark Distributions at x > 1

Fomin, N. and Filippone, B. W. (2010) Scaling of the F_2 Structure Function in Nuclei and Quark Distributions at x > 1. Physical Review Letters, 105 (21). Art. No. 212502 . ISSN 0031-9007.

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We present new data on electron scattering from a range of nuclei taken in Hall C at Jefferson Lab. For heavy nuclei, we observe a rapid falloff in the cross section for x > 1, which is sensitive to short-range contributions to the nuclear wave function, and in deep inelastic scattering corresponds to probing extremely high momentum quarks. This result agrees with higher energy muon scattering measurements, but is in sharp contrast to neutrino scattering measurements which suggested a dramatic enhancement in the distribution of the “superfast” quarks probed at x > 1. The falloff at x > 1 is noticeably stronger in ^2H and ^3He, but nearly identical for all heavier nuclei.

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Additional Information:© 2010 The American Physical Society. Received 20 August 2010; published 17 November 2010. We thank the JLab technical staff and accelerator division for their contributions. This work supported in part by the NSF and DOE, including Grant No. NSF-0244899 and DOE Contracts No. DE-FG02-96ER40950, No. DEAC02- 06CH11357, and No. DE-AC05-06OR23177 under which JSA, LLC operates JLab, and the South African NRF.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-96ER40950
Department of Energy (DOE)DE-AC02-06CH11357
Department of Energy (DOE)DE-AC05-06OR23177
South Africa National Research Foundation (NRF)UNSPECIFIED
Issue or Number:21
Classification Code:PACS: 25.30.Fj, 13.60.Hb, 24.85.+p
Record Number:CaltechAUTHORS:20110106-074516354
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Official Citation:Fomin, N., J. Arrington, et al. (2010). "Scaling of the F_{2} Structure Function in Nuclei and Quark Distributions at x>1." Physical Review Letters 105(21): 212502.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21613
Deposited By: Tony Diaz
Deposited On:26 Jan 2011 22:09
Last Modified:03 Oct 2019 02:26

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