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

0537335 - FZÚ 2021 RIV US eng J - Journal Article
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš - Royon, C. … Total 372 authors
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
Research Infrastructure: Fermilab-CZ II - 90113
Institutional support: RVO:68378271
Keywords : Fermilab * hadroproduction * hadron * D0
OECD category: Particles and field physics
Impact factor: 5.296, year: 2020
Method of publishing: 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.

Permanent Link: http://hdl.handle.net/11104/0315057