Transverse momentum distributions in the nonperturbative region

被引：27

作者：

Mantry, Sonny ^{[1
]}

Petriello, Frank ^{[2
,3
]}

机构：

[1] Univ Wisconsin, Madison, WI 53706 USA

[2] Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA

[3] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 01期

关键词：

HIGGS-BOSON; PARTON DISTRIBUTIONS; RESUMMATION; SPECTRUM; GAUGE; LINES; JETS; Q(T);

D O I：

10.1103/PhysRevD.84.014030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the low transverse momentum (p(T)) distribution of the Z-boson at hadron colliders for p(T) similar to Lambda(QCD) using a factorization and resummation formula derived in the soft-collinear effective theory (SCET). In the region p(T) similar to Lambda(QCD), new nonperturbative effects arise that cannot be entirely captured by the standard parton distribution functions, and require an additional new nonperturbative transverse momentum function (TMF). The TMF is field-theoretically defined in SCET, fully gauge-invariant, and captures the nonperturbative dynamics that affect the p(T)-distribution in the region p(T) similar to Lambda(QCD). The TMF also reduces to the expected perturbative result in the region p(T) >> Lambda(QCD). We develop phenomenological models for these TMFs in the nonperturbative region, and discuss in detail fits to Tevatron data in which both experimental and theoretical errors are carefully treated.

引用

页数：8

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