BFKL Pomeron loop contribution in diffractive photoproduction and inclusive hadroproduction of J/ψ and Υ

Kotko, Piotr; Motyka, Leszek; Sadzikowski, Mariusz; Staśto, Anna M.

doi:10.1007/jhep07(2019)129

BFKL Pomeron loop contribution in diffractive photoproduction and inclusive hadroproduction of J/ψ and Υ

Journal Article · Tue Jul 23 00:00:00 EDT 2019 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep07(2019)129· OSTI ID:1610650

Kotko, Piotr ^[1]; Motyka, Leszek ^[2]; Sadzikowski, Mariusz ^[2]; Staśto, Anna M. ^[3]

Polish Academy of Sciences (PAS), Krakow (Poland). Inst. of Nuclear Physics; DOE/OSTI
Jagellonian Univ., Krakow (Poland). Inst. of Physics
Pennsylvania State Univ., University Park, PA (United States)

We analyze contributions to the heavy vector meson production with large transverse momentum in proton-proton and diffractive photon-proton scattering driven by an exchange of two Balitsky-Fadin-Kuraev-Lipatov Pomerons in the squared amplitudes. The Pomerons couple to a single parton and form a Pomeron loop closed by the vector meson impact factors. For the photon-proton case the diffractive cut of the Pomeron loop contributes, and for the inclusive hadroproduction one finds the loop with two cut Pomerons. We compute both of these Pomeron loop contributions and study in detail their properties. The results are then used to calculate the cross sections for diffractive J/ψ photoproduction with large transverse momentum at HERA and the correlated two Pomeron contribution for inclusive J/ψ and γ production cross sections at the LHC. Within a unified approach a good description of the photoproduction data is found, but correlated two Pomeron mechanism gives only a small contribution to hadroproduction of the vector mesons at the LHC.

View Accepted Manuscript (DOE)

Research Organization:: Pennsylvania State Univ., University Park, PA (United States)

Sponsoring Organization:: National Science Centre, Poland; USDOE Office of Science (SC); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: SC0002145

OSTI ID:: 1610650

Alternate ID(s):: OSTI ID: 1631144

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 7 Vol. 2019; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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