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Type: Journal article
Title: Isovector EMC effect and the NuTeV anomaly
Author: Cloet, I.
Bentz, W.
Thomas, A.
Citation: Physical Review Letters, 2009; 102(25):252301-1-252301-4
Publisher: American Physical Soc
Issue Date: 2009
ISSN: 0031-9007
Statement of
I. C. Cloët, W. Bentz and A. W. Thomas
Abstract: A neutron or proton excess in nuclei leads to an isovector-vector mean field which, through its coupling to the quarks in a bound nucleon, implies a shift in the quark distributions with respect to the Bjorken scaling variable. We show that this result leads to an additional correction to the NuTeV measurement of sin2ϕW. The sign of this correction is largely model independent and acts to reduce their result. Explicit calculation in nuclear matter within a covariant and confining Nambu–Jona-Lasinio model predicts that this vector field correction may account for a substantial fraction of the NuTeV anomaly. We are therefore led to offer a new interpretation of the NuTeV measurement, namely, that it provides further evidence for the medium modification of the bound nucleon wave function.
Rights: ©2009 American Physical Society
RMID: 0020112932
DOI: 10.1103/PhysRevLett.102.252301
Appears in Collections:Chemistry and Physics publications

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