Improved extraction of valence transversity distributions from inclusive dihadron production

被引：92

作者：

Radici, Marco ^{[1
]}

Courtoy, A. ^{[2
,3
]}

Bacchetta, Alessandro ^{[1
,4
]}

Guagnelli, Marco ^{[1
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[2] Univ Liege, AGO Dept, IFPA, B-4000 Cointe Ougree, Belgium

[3] Univ Guanajuato, Div Ciencias & Ingn, Guanajuato 37150, Mexico

[4] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2015年 / 05期

关键词：

Deep Inelastic Scattering (Phenomenology); QCD Phenomenology; INTERFERENCE FRAGMENTATION FUNCTIONS; PARTON DISTRIBUTIONS; EVOLUTION; NUCLEONS; HADRON;

D O I：

10.1007/JHEP05(2015)123

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 an updated extraction of the transversity parton distribution based on the analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets in collinear factorization. Data for proton and deuteron targets make it possible to perform a flavor separation of the valence components of the transversity distribution, using di-hadron fragmentation functions taken from the semi-inclusive production of two pion pairs in back-to-back jets in e(+)e(-) annihilation. The e(+)e(-) data from Belle have been reanalyzed using the replica method and a more realistic estimate of the uncertainties on the chiral-odd interference fragmentation function has been obtained. Then, the transversity distribution has been extracted by using the most recent and more precise COMPASS data for deep-inelastic scattering off proton targets. Our results represent the most accurate estimate of the uncertainties on the valence components of the transversity distribution currently available.

引用

页数：24

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