Higher twists and color polarizabilities in the neutron

Meziani, Z.E.; Melnitchouk, W.; Chen, Jian-Ping; Choi, Seonho; Averett, T.; Cates, G.; de Jager, C.W.; Deur, A.; Gao, H.; Garibaldi, F.

doi:10.1016/j.j.physletb.2005.03.046

Higher twists and color polarizabilities in the neutron

Apr, 2004

4 pages

Published in:

Phys.Lett.B 613 (2005) 148-153

e-Print:

hep-ph/0404066 [hep-ph]

DOI:

Report number:

JLAB-PHY-04-10

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Abstract:

Color polarizabilities of the neutron are extracted from data on the lowest moment of the spin-dependent

g_1

structure function. New data in the resonance region from Jefferson Lab at Q^2 \alt 1 GeV

^2

, in combination with world data at higher

Q^2

, allow a systematic determination of the

1/Q^2

corrections, and provide the first constraints on

1/Q^4

corrections. The results suggest that higher-twist effects in the neutron are small, and that quark-hadron duality may be approximately valid, even down to

Q^2 \sim 1

GeV

^2

.

12.38.Aw
12.38.Qk
13.60.Hb
n: structure function
structure function: spin
moment
effect: higher-twist
momentum transfer dependence
color: polarizability
duality: quark hadron

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