ORDER-ALPHA(S)2 QCD CORRECTIONS TO THE DEEP INELASTIC PROTON STRUCTURE FUNCTIONS F(2) AND F(L)

被引:314
作者
ZIJLSTRA, EB
VANNEERVEN, WL
机构
[1] Instituut-Lorentz, University of Leyden, 2300 RA Leyden
关键词
D O I
10.1016/0550-3213(92)90087-R
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We present the calculation of the order-alpha(s)2 correction to the deep inelastic coefficient functions C(i)(x, Q2) (i = 2, L). Its effect on the behaviour of the proton structure functions F(i)(x, Q2) for fixed target and HERA energies is studied:We investigate the dependence of the O(alpha(s)2) QCD corrected structure functions on the mass factorization scale and the specific parametrization chosen for the parton densities. Also discussed-are the implications of the higher-order QCD corrections for the extraction of the parton densities, in particular the gluon distribution function, from the data. Our analysis reveals that the O(alpha(s)2) contributions to F2(x, Q2) are appreciable and can amount from +10% (large-x region) to -20% (small-x region), depending on the chosen value for Q2 and the parton density set. In the case of F(L)(x, Q2) the corrections in the small-x region can be even larger (about 45%). The large corrections in the region 0.5 < x < 1, which can be attributed to soft-gluon radiation, may explain the difference observed between the combined SLAC-BCDMS data and the fit based on the next-to-leading-log (NLL) approximation for the proton structure function F2(x, Q2).
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页码:525 / 574
页数:50
相关论文
共 79 条
[1]  
ALI A, 1991, NUCL PHYS B S, V18
[2]   LARGE PERTURBATIVE CORRECTIONS TO THE DRELL-YAN PROCESS IN QCD [J].
ALTARELLI, G ;
ELLIS, RK ;
MARTINELLI, G .
NUCLEAR PHYSICS B, 1979, 157 (03) :461-497
[3]   ASYMPTOTIC FREEDOM IN PARTON LANGUAGE [J].
ALTARELLI, G ;
PARISI, G .
NUCLEAR PHYSICS B, 1977, 126 (02) :298-318
[4]   LEPTOPRODUCTION AND DRELL-YAN PROCESSES BEYOND LEADING APPROXIMATION IN CHROMODYNAMICS [J].
ALTARELLI, G ;
ELLIS, RK ;
MARTINELLI, G .
NUCLEAR PHYSICS B, 1978, 143 (03) :521-545
[5]  
Altarelli G., 1978, NUCL PHYS B, V146, P544
[6]  
AMAUDRUZ P, 1991, PHYS REV LETT, V66, P73
[7]   SOFT GLUONS AND THE NORMALIZATION OF THE DRELL-YAN CROSS-SECTION [J].
APPELL, D ;
STERMAN, G ;
MACKENZIE, P .
NUCLEAR PHYSICS B, 1988, 309 (02) :259-281
[8]   DEEP-INELASTIC SCATTERING BEYOND THE LEADING ORDER IN ASYMPTOTICALLY FREE GAUGE THEORIES [J].
BARDEEN, WA ;
BURAS, AJ ;
DUKE, DW ;
MUTA, T .
PHYSICAL REVIEW D, 1978, 18 (11) :3998-4017
[9]  
BAWA AC, 1987, OCT P HERA WORKSH HA, V1, P183
[10]   QCD CORRECTIONS TO HEAVY-QUARK PRODUCTION IN PPBAR COLLISIONS [J].
BEENAKKER, W ;
KUIJF, H ;
VANNEERVEN, WL ;
SMITH, J .
PHYSICAL REVIEW D, 1989, 40 (01) :54-82