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.
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页数：24
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