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Inclusive prompt $$\chi _{c,b}(1^{++})$$ χ c , b ( 1 + + ) production at the LHC.

Shuvaev, A. G. and Khoze, V. A. and Martin, A. D. and Ryskin, M. G. (2015) 'Inclusive prompt $$\chi _{c,b}(1^{++})$$ χ c , b ( 1 + + ) production at the LHC.', European physical journal C., 75 (12). p. 3840.


We study the prompt production of the χc(1+) and χb(1+) mesons at high energies. Unlike χ(0+,2+) production, χ(1+) mesons cannot be created at LO via the fusion of two on-mass-shell gluons, that is, gg→χc,b(1+) are not allowed. However, the available experimental data show that the cross sections for χc(1+) and χc(2+) are comparable. We therefore investigate four other χ(1+) production mechanisms: namely, (i) the standard NLO process gg→χc,b(1+)+g , (ii) via gluon virtuality, (iii) via gluon reggeisation and, finally, (iv) the possibility to form χc,b(1+) by the fusion of three gluons, where one extra gluon comes from another parton cascade, as in the Double Parton Scattering processes.

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Publisher statement:© The Author(s) 2015. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.
Date accepted:11 December 2015
Date deposited:18 April 2019
Date of first online publication:December 2015
Date first made open access:No date available

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