Nonperturbative and spin effects in the central exclusive production of the tensor χc(2+) meson
(2010) In Physical Review D (Particles, Fields, Gravitation and Cosmology) 81(3).- Abstract
We discuss central exclusive production (CEP) of the tensor χc(2 +) meson in proton-(anti)proton collisions at Tevatron, RHIC, and LHC energies. The amplitude for the process is derived within the kt-factorization approach. Differential and total cross sections are calculated for several unintegrated gluon distribution functions (UGDFs). We compare exclusive production of all charmonium states χc(0+), χc(1+) and χc(2+). Good description of the recent Tevatron data is achieved both with Martin-Ryskin phenomenological UGDF and UGDF based on unified BFKL-DGLAP approach. Unlike for Higgs production, the main contribution to the diffractive amplitude of heavy quarkonia comes from nonperturbative... (More)
We discuss central exclusive production (CEP) of the tensor χc(2 +) meson in proton-(anti)proton collisions at Tevatron, RHIC, and LHC energies. The amplitude for the process is derived within the kt-factorization approach. Differential and total cross sections are calculated for several unintegrated gluon distribution functions (UGDFs). We compare exclusive production of all charmonium states χc(0+), χc(1+) and χc(2+). Good description of the recent Tevatron data is achieved both with Martin-Ryskin phenomenological UGDF and UGDF based on unified BFKL-DGLAP approach. Unlike for Higgs production, the main contribution to the diffractive amplitude of heavy quarkonia comes from nonperturbative region of gluon transverse momenta Q +,2+) to the J/Ψ+γ channel to be comparable or larger than that of the χc(0+) one. This is partially due to a significant contribution from lower polarization states λ=0 for χc(1+) and λ=0, ±1 for χc(2+) meson. Corresponding theoretical uncertainties are discussed.
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- author
- Pasechnik, R. S. LU ; Szczurek, A. and Teryaev, O. V.
- organization
- publishing date
- 2010-02-18
- type
- Contribution to journal
- publication status
- published
- in
- Physical Review D (Particles, Fields, Gravitation and Cosmology)
- volume
- 81
- issue
- 3
- article number
- 034024
- publisher
- American Physical Society
- external identifiers
-
- scopus:77749334763
- ISSN
- 1550-7998
- DOI
- 10.1103/PhysRevD.81.034024
- language
- English
- LU publication?
- yes
- id
- 9ba097b6-c429-4d8e-9d98-4cd217446181
- date added to LUP
- 2016-08-18 21:08:10
- date last changed
- 2024-04-19 08:19:04
@article{9ba097b6-c429-4d8e-9d98-4cd217446181, abstract = {{<p>We discuss central exclusive production (CEP) of the tensor χc(2 <sup>+</sup>) meson in proton-(anti)proton collisions at Tevatron, RHIC, and LHC energies. The amplitude for the process is derived within the kt-factorization approach. Differential and total cross sections are calculated for several unintegrated gluon distribution functions (UGDFs). We compare exclusive production of all charmonium states χc(0<sup>+</sup>), χc(1<sup>+</sup>) and χc(2<sup>+</sup>). Good description of the recent Tevatron data is achieved both with Martin-Ryskin phenomenological UGDF and UGDF based on unified BFKL-DGLAP approach. Unlike for Higgs production, the main contribution to the diffractive amplitude of heavy quarkonia comes from nonperturbative region of gluon transverse momenta Q +,2<sup>+</sup>) to the J/Ψ+γ channel to be comparable or larger than that of the χc(0<sup>+</sup>) one. This is partially due to a significant contribution from lower polarization states λ=0 for χc(1<sup>+</sup>) and λ=0, ±1 for χc(2<sup>+</sup>) meson. Corresponding theoretical uncertainties are discussed.</p>}}, author = {{Pasechnik, R. S. and Szczurek, A. and Teryaev, O. V.}}, issn = {{1550-7998}}, language = {{eng}}, month = {{02}}, number = {{3}}, publisher = {{American Physical Society}}, series = {{Physical Review D (Particles, Fields, Gravitation and Cosmology)}}, title = {{Nonperturbative and spin effects in the central exclusive production of the tensor χc(2+) meson}}, url = {{http://dx.doi.org/10.1103/PhysRevD.81.034024}}, doi = {{10.1103/PhysRevD.81.034024}}, volume = {{81}}, year = {{2010}}, }