Studies of X(3872) and ψ(2S) production in pp¯ collisions at 1.96 TeV

0537335 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš - Royon, C. … celkem 372 autorů
Studies of X(3872) and ψ(2S) production in pp¯ collisions at 1.96 TeV.
Physical Review D. Roč. 102, č. 7 (2020), s. 1-14, č. článku 072005. ISSN 2470-0010. E-ISSN 2470-0029
Výzkumná infrastruktura: Fermilab-CZ II - 90113
Institucionální podpora: RVO:68378271
Klíčová slova: Fermilab * hadroproduction * hadron * D0
Obor OECD: Particles and field physics
Impakt faktor: 5.296, rok: 2020
Způsob publikování: Open access

We present various properties of the production of the X(3872) and ψ(2S) states based on 10.4  fb-1 collected by the D0 experiment in Tevatron pp¯ collisions at s=1.96  TeV. For both states, we measure the nonprompt fraction fNP of the inclusive production rate due to decays of b-flavored hadrons. We find the fNP values systematically below those obtained at the LHC. The fNP fraction for ψ(2S) increases with transverse momentum, whereas for the X(3872) it is constant within large uncertainties, in agreement with the LHC results. The ratio of prompt to nonprompt ψ(2S) production, (1-fNP)/fNP, decreases only slightly going from the Tevatron to the LHC, but for the X(3872), this ratio decreases by a factor of about 3. We test the soft-pion signature of the X(3872) modeled as a weakly bound charm-meson pair by studying the production of the X(3872) as a function of the kinetic energy of the X(3872) and the pion in the X(3872)π center-of-mass frame.

Trvalý link: http://hdl.handle.net/11104/0315057