Transverse momentum distributions of quarks in the nucleon from the Chiral Quark Soliton Model - INSPIRE

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Transverse momentum distributions of quarks in the nucleon from the Chiral Quark Soliton Model

M. Wakamatsu
(
- Osaka U.
)

Mar, 2009

23 pages

Published in:

Phys.Rev.D 79 (2009) 094028

e-Print:

0903.1886 [hep-ph]

DOI:

10.1103/PhysRevD.79.094028

Report number:

OU-HET-625

View in:

ADS Abstract Service

reference search47 citations

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Abstract: (arXiv)

We report the first calculation of the simplest but most fundamental transverse momentum dependent (TMD) distribution of quarks in the nucleon, i.e. the time-reversal-even unpolarized TMD quark and antiquark distribution with isoscalar combination, within the framework of the chiral quark soliton model. The nonperturbative account of the deformed Dirac-sea quarks within the theoretical scheme enables us to make a reliable predictions not only for the quark distribution but also for the antiquark distribution. We found that the predicted average transverse momentum square

<k_\perp^2>

of quarks and antiquarks depends strongly on their longitudinal momentum fraction

x

, which means that the frequently used assumption of factorization in

x

and

k_\perp

is significantly violated. It is also found, somewhat unexpectedly, that the average transverse momentum square of antiquarks is considerably larger than that of quarks.

Note:

23 pages, 8 figures

13.15.+g
12.39.Fe
12.38.Lg
12.39.Ki
transverse momentum dependence
antiquark: distribution function
quark: distribution function
chiral quark soliton model
nucleon: model
time reversal

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Figures(8)

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