Gluon TMDs and NRQCD matrix elements in J/ψproduction at an EIC

被引：0

作者：

Bacchetta, Alessandro ^{[1
,2
]}

Boer, Daniel ^{[3
]}

Pisano, Cristian ^{[4
,5
]}

Taels, Pieter ^{[2
]}

机构：

[1] Univ Pavia, Dipartimento Fis, Via Bassi 6, I-27100 Pavia, Italy

[2] Ist Nazl Fis Nucl, Sez Pavia, Via Bassi 6, I-27100 Pavia, Italy

[3] Univ Groningen, Van Swinderen Inst Particle Phys & Grav, Nijenborgh 4, NL-9747 AG Groningen, Netherlands

[4] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy

[5] Ist Nazl Fis Nucl, Sez Cagliari, I-09042 Monserrato, CA, Italy

来源：

EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 01期

基金：

欧盟地平线“2020”;

关键词：

SPIN ASYMMETRIES; DRELL-YAN; QUARK; ANNIHILATION; LHC; QCD;

D O I：

10.1140/epjc/s10052-020-7620-8

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：

In this paper we analyze azimuthal asymmetries in the processes of unpolarized and polarized J/psi(& x3a5;)production at an Electron-Ion Collider. Apart from giving access to various unknown gluon transverse momentum distributions, we suggest to use them as a new method to extract specific color-octet NRQCD long-distance matrix elements, i.e. ⟨0|O8J/psi(1S0), whose values are still quite uncertain and for which lattice calculations are unavailable. The new method is based on combining measurements of analogous asymmetries in open heavy-quark pair production which can be performed at the same energy. We also study for the first time the effects of transverse-momentum smearing in the quarkonium formation process. To enhance the gluon contribution one can consider smaller values of x and, in order to assess the impact of small-x evolution, we perform a numerical study using the MV model as a starting input and evolve it with the JIMWLK equations.

引用

页数：20

共 84 条

[1] Electron-Ion Collider: The next QCD frontier [J].

Accardi, A. ;

Albacete, J. L. ;

Anselmino, M. ;

Armesto, N. ;

Aschenauer, E. C. ;

Bacchetta, A. ;

Boer, D. ;

Brooks, W. K. ;

Burton, T. ;

Chang, N. -B. ;

Deng, W. -T. ;

Deshpande, A. ;

Diehl, M. ;

Dumitru, A. ;

Dupre, R. ;

Ent, R. ;

Fazio, S. ;

Gao, H. ;

Guzey, V. ;

Hakobyan, H. ;

Hao, Y. ;

Hasch, D. ;

Holt, R. ;

Horn, T. ;

Huang, M. ;

Hutton, A. ;

Hyde, C. ;

Jalilian-Marian, J. ;

Klein, S. ;

Kopeliovich, B. ;

Kovchegov, Y. ;

Kumar, K. ;

Kumericki, K. ;

Lamont, M. A. C. ;

Lappi, T. ;

Lee, J. -H. ;

Lee, Y. ;

Levin, E. M. ;

Lin, F. -L. ;

Litvinenko, V. ;

Ludlam, T. W. ;

Marquet, C. ;

Meziani, Z. -E. ;

McKeown, R. ;

Metz, A. ;

Milner, R. ;

Morozov, V. S. ;

Mueller, A. H. ;

Muller, B. ;

Mueller, D. .

EUROPEAN PHYSICAL JOURNAL A, 2016, 52 (09)

[2] Azimuthal asymmetries for quark pair production in pA collisions [J].

Akcakaya, Emin ;

Schaefer, Andreas ;

Zhou, Jian .

PHYSICAL REVIEW D, 2013, 87 (05)

[3] Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions [J].

Andronic, A. ;

Arleo, F. ;

Arnaldi, R. ;

Beraudo, A. ;

Bruna, E. ;

Caffarri, D. ;

Conesa del Valle, Z. ;

Contreras, J. G. ;

Dahms, T. ;

Dainese, A. ;

Djordjevic, M. ;

Ferreiro, E. G. ;

Fujii, H. ;

Gossiaux, P. -B. ;

Granier de Cassagnac, R. ;

Hadjidakis, C. ;

He, M. ;

van Hees, H. ;

Horowitz, W. A. ;

Kolevatov, R. ;

Kopeliovich, B. Z. ;

Lansberg, J. -P. ;

Lombardo, M. P. ;

Lourenco, C. ;

Martinez-Garcia, G. ;

Massacrier, L. ;

Mironov, C. ;

Mischke, A. ;

Nahrgang, M. ;

Nguyen, M. ;

Nystrand, J. ;

Peigne, S. ;

Porteboeuf-Houssais, S. ;

Potashnikova, I. K. ;

Rakotozafindrabe, A. ;

Rapp, R. ;

Robbe, P. ;

Rosati, M. ;

Rosnet, P. ;

Satz, H. ;

Schicker, R. ;

Schienbein, I. ;

Schmidt, I. ;

Scomparin, E. ;

Sharma, R. ;

Stachel, J. ;

Stocco, D. ;

Strickland, M. ;

Tieulent, R. ;

Trzeciak, B. A. .

EUROPEAN PHYSICAL JOURNAL C, 2016, 76 (03)

[4] Direct J/psi and psi' polarization and cross sections at the Fermilab Tevatron [J].

Beneke, M ;

Kramer, M .

PHYSICAL REVIEW D, 1997, 55 (09) :R5269-R5272

[5] Improved determination of color-singlet nonrelativistic QCD matrix elements for S-wave charmonium [J].

Bodwin, Geoffrey T. ;

Chung, Hee Sok ;

Kang, Daekyoung ;

Lee, Jungil ;

Yu, Chaehyun .

PHYSICAL REVIEW D, 2008, 77 (09)

[6] Fragmentation Contributions to J/ψ Production at the Tevatron and the LHC [J].

Bodwin, Geoffrey T. ;

Chung, Hee Sok ;

Kim, U-Rae ;

Lee, Jungil .

PHYSICAL REVIEW LETTERS, 2014, 113 (02)

[7] RIGOROUS QCD ANALYSIS OF INCLUSIVE ANNIHILATION AND PRODUCTION OF HEAVY QUARKONIUM [J].

BODWIN, GT ;

BRAATEN, E ;

LEPAGE, GP .

PHYSICAL REVIEW D, 1995, 51 (03) :1125-1171

[8] Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium (vol 51, pg 1125, 1995) [J].

Bodwin, GT ;

Braaten, E ;

Lepage, GP .

PHYSICAL REVIEW D, 1997, 55 (09) :5853-5854

[9] Quarkonium decay matrix elements from quenched lattice QCD [J].

Bodwin, GT ;

Sinclair, DK ;

Kim, S .

PHYSICAL REVIEW LETTERS, 1996, 77 (12) :2376-2379

[10] Time-reversal odd distribution functions in leptoproduction [J].

Boer, D ;

Mulders, PJ .

PHYSICAL REVIEW D, 1998, 57 (09) :5780-5786

← 1 2 3 4 5 6 7 8 9 →