Are there any challenges in the charmonia production and polarization at the LHC?

被引：21

作者：

Baranov, S. P. ^{[1
]}

Lipatov, A. V. ^{[2
,3
]}

机构：

[1] PN Lebedev Inst Phys, Moscow 119991, Russia

[2] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

[3] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

来源：

PHYSICAL REVIEW D | 2019年 / 100卷 / 11期

关键词：

SMALL-X PHENOMENOLOGY; HEAVY-QUARK PRODUCTION; J-PSI; HADRONIC PRODUCTION; PP COLLISIONS; QCD COHERENCE; CROSS-SECTION; PHOTOPRODUCTION; FACTORIZATION; UPSILON;

D O I：

10.1103/PhysRevD.100.114021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the inclusive prompt production of psi', chi(c), J/psi and LHC mesons at the LHC using the k(T)-factorization approach. Our consideration is based on the off-shell production amplitudes for hard partonic subprocesses, nonrelativistic QCD formalism for the formation of bound states and transverse momentum dependent (or unintegrated) gluon densities in a proton derived from Catani-Ciafaloni-FioraniMarchesini equation. The nonperturbative color octet transitions are treated in terms of the multipole radiation theory. We extract the corresponding long-distance matrix elements from a combined fit to transverse momentum distributions measured at various LHC experiments. We make predictions for the polarization parameters lambda(theta), lambda(phi), lambda(theta phi) and the frame-independent parameter lambda* and compare them to the available psi' and J/psi, data. Finally, we present a universal set of parameters that provides a reasonable simultaneous description for the whole body of the LHC data (on the p(T) distributions, relative production rates and polarization observables) for the whole charmonium family.

引用

页数：19

共 83 条

[1]

Aaij R, 2015, J HIGH ENERGY PHYS, DOI 10.1007/JHEP10(2015)172

[2]

Aaij R, 2015, EUR PHYS J C, V75, P1, DOI 10.1140/epjc/s10052-015-3502-x

[3]

Aaij R, 2014, EUR PHYS J C, V74, DOI 10.1140/epjc/s10052-014-2872-9

[4]

Aaij R, 2013, EUR PHYS J C, V73, DOI 10.1140/epjc/s10052-013-2631-3

[5]

Aaij R, 2013, J HIGH ENERGY PHYS, DOI 10.1007/JHEP10(2013)115

[6]

Aaij R, 2012, EUR PHYS J C, V72, DOI 10.1140/epjc/s10052-012-2100-4

[7] Measurement of the cross-section ratio σ(χc2)/σ(χc1) for prompt χc production at √s=7 TeV LHCb Collaboration [J].

Aaij, R. ;

Abelian Beteta, C. ;

Adeva, B. ;

Adinolfi, M. ;

Adrover, C. ;

Affolder, A. ;

Ajaltouni, Z. ;

Albrecht, J. ;

Alessio, F. ;

Alexander, M. ;

Alkhazov, G. ;

Alvarez Cartelle, P. ;

Alves, A. A., Jr. ;

Amato, S. ;

Amhis, Y. ;

Anderson, J. ;

Appleby, R. B. ;

Gutierrez, O. Aquines ;

Archilli, F. ;

Arrabito, L. ;

Artamonov, A. ;

Artuso, M. ;

Aslanides, E. ;

Auriemma, G. ;

Bachmann, S. ;

Back, J. J. ;

Bailey, D. S. ;

Balagura, V. ;

Baldini, W. ;

Barlow, R. J. ;

Barschel, C. ;

Barsuk, S. ;

Barter, W. ;

Bates, A. ;

Bauer, C. ;

Bauer, Th. ;

Bay, A. ;

Bediaga, I. ;

Belogurov, S. ;

Belous, K. ;

Belyaev, I. ;

Ben-Haim, E. ;

Benayoun, M. ;

Bencivenni, G. ;

Benson, S. ;

Benton, J. ;

Bernet, R. ;

Bettler, M. -O. ;

van Beuzekom, M. ;

Bien, A. .

PHYSICS LETTERS B, 2012, 714 (2-5) :215-223

[8]

Aaij R, 2011, EUR PHYS J C, V71, DOI 10.1140/epjc/s10052-011-1645-y

[9]

Aaij R., 2016, JHEP, V10

[10] Small-x phenomenology -: Summary of the 3rd Lund small-x workshop in 2004 [J].

Andersen, J. R. ;

Baranov, S. ;

Bartels, J. ;

Barnafoldi, G. G. ;

Chachamis, G. ;

Collins, J. ;

Grindhammer, G. ;

Gustafson, G. ;

Hansson, M. ;

Ingelman, G. ;

Jung, H. ;

Jonsson, L. ;

Knutsson, A. ;

Kowalski, H. ;

Kutak, K. ;

Kyrieleis, A. ;

Levai, P. ;

Lipatov, A. ;

Lonnblad, L. ;

Lublinsky, M. ;

Marchesini, G. ;

Milcewicz, I. ;

Risler, C. ;

Sabio-Vera, A. ;

Sjodahl, M. ;

Stasto, A. ;

Turnau, J. ;

Watt, G. ;

Zotov, N. .

EUROPEAN PHYSICAL JOURNAL C, 2006, 48 (01) :53-105

← 1 2 3 4 5 6 7 8 9 →