scholarly journals Evidence for charge symmetry violation in parton distributions

1999 ◽  
Vol 59 (7) ◽  
Author(s):  
C. Boros ◽  
J. T. Londergan ◽  
A. W. Thomas
2014 ◽  
Vol 23 (07) ◽  
pp. 1461010
Author(s):  
R. D. Young ◽  
P. E. Shanahan ◽  
A. W. Thomas

Recent work unambiguously resolves the level of charge symmetry violation in moments of parton distributions using (2 + 1)-flavor lattice QCD. We introduce the methods used for that analysis by applying them to determine the strong contribution to the proton–neutron mass difference. We also summarize related work which reveals that the fraction of baryon spin which is carried by the quarks is in fact structure-dependent rather than universal across the baryon octet.


1999 ◽  
Vol 468 (1-2) ◽  
pp. 161-167 ◽  
Author(s):  
C. Boros ◽  
F.M. Steffens ◽  
J.T. Londergan ◽  
A.W. Thomas

1994 ◽  
Vol 09 (19) ◽  
pp. 1799-1806 ◽  
Author(s):  
E.N. RODIONOV ◽  
A.W. THOMAS ◽  
J.T. LONDERGAN

We calculate the valence distribution of down quarks in the proton and up quarks in the neutron (the ‘minority’ quark distributions), taking into consideration the major sources of charge symmetry violation, including the effect of the mass difference of the u and d quarks on the bag wave function, and the masses of the intermediate diquark states. The relative difference of the distributions can be as large as 10% for intermediate values of Bjorken x.


1999 ◽  
Vol 654 (1) ◽  
pp. 596c-601c
Author(s):  
A.W. Thomas ◽  
C. Boros ◽  
J.T. Londergan

1998 ◽  
Vol 81 (19) ◽  
pp. 4075-4078 ◽  
Author(s):  
C. Boros ◽  
J. T. Londergan ◽  
A. W. Thomas

1982 ◽  
Vol 115 (3) ◽  
pp. 171-173 ◽  
Author(s):  
L.N. Bogdanova ◽  
V.E. Markushin ◽  
V.S. Melezhik ◽  
L.I. Ponomarev

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