Elastic double diffractive production of axial-vector χc (1+ +) mesons and the Landau-Yang theorem
(2009) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 680(1). p.62-71- Abstract
We discuss exclusive elastic double diffractive axial-vector χc (1+) meson production in proton-antiproton collisions at the Tevatron. The amplitude for the process is derived within the kt-factorization approach with unintegrated gluon distribution functions (UGDFs). We show that the famous Landau-Yang theorem is not applicable in the case of off-shell gluons. Differential cross sections for different UGDFs are calculated. We compare exclusive production of χc (1+) and χc (0+). The contribution of χc (1+) to the J / Ψ + γ channel is smaller than that of the χc (0+) decay, but not negligible and can be measured. The... (More)
We discuss exclusive elastic double diffractive axial-vector χc (1+) meson production in proton-antiproton collisions at the Tevatron. The amplitude for the process is derived within the kt-factorization approach with unintegrated gluon distribution functions (UGDFs). We show that the famous Landau-Yang theorem is not applicable in the case of off-shell gluons. Differential cross sections for different UGDFs are calculated. We compare exclusive production of χc (1+) and χc (0+). The contribution of χc (1+) to the J / Ψ + γ channel is smaller than that of the χc (0+) decay, but not negligible and can be measured. The numerical value of the ratio of the both contributions is much less dependent on the UGDFs modeling than the cross sections themselves.
(Less)
- author
- Pasechnik, R. S. LU ; Szczurek, A. and Teryaev, O. V.
- publishing date
- 2009-09-14
- type
- Contribution to journal
- publication status
- published
- in
- Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 680
- issue
- 1
- pages
- 10 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:69549115138
- ISSN
- 0370-2693
- DOI
- 10.1016/j.physletb.2009.08.035
- language
- English
- LU publication?
- no
- id
- ca25e261-e02b-4aef-b197-34b72e149154
- date added to LUP
- 2016-08-18 21:11:30
- date last changed
- 2022-04-08 22:37:42
@article{ca25e261-e02b-4aef-b197-34b72e149154, abstract = {{<p>We discuss exclusive elastic double diffractive axial-vector χ<sub>c</sub> (1<sup>+</sup>) meson production in proton-antiproton collisions at the Tevatron. The amplitude for the process is derived within the k<sub>t</sub>-factorization approach with unintegrated gluon distribution functions (UGDFs). We show that the famous Landau-Yang theorem is not applicable in the case of off-shell gluons. Differential cross sections for different UGDFs are calculated. We compare exclusive production of χ<sub>c</sub> (1<sup>+</sup>) and χ<sub>c</sub> (0<sup>+</sup>). The contribution of χ<sub>c</sub> (1<sup>+</sup>) to the J / Ψ + γ channel is smaller than that of the χ<sub>c</sub> (0<sup>+</sup>) decay, but not negligible and can be measured. The numerical value of the ratio of the both contributions is much less dependent on the UGDFs modeling than the cross sections themselves.</p>}}, author = {{Pasechnik, R. S. and Szczurek, A. and Teryaev, O. V.}}, issn = {{0370-2693}}, language = {{eng}}, month = {{09}}, number = {{1}}, pages = {{62--71}}, publisher = {{Elsevier}}, series = {{Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics}}, title = {{Elastic double diffractive production of axial-vector χ<sub>c</sub> (1<sup>+ +</sup>) mesons and the Landau-Yang theorem}}, url = {{http://dx.doi.org/10.1016/j.physletb.2009.08.035}}, doi = {{10.1016/j.physletb.2009.08.035}}, volume = {{680}}, year = {{2009}}, }