Next-to-leading-order nonrelativistic QCD disfavors the interpretation of X(3872) as chi(c1)(2P)

Autor(en)

Mathias Butenschoen, Zhi-Guo He, Bernd A. Kniehl

Abstrakt

We study χc1(2P)-inclusive hadroproduction at next-to-leading-order (NLO), both in αs and v2, within the factorization formalism of nonrelativistic quantum chromodynamics (NRQCD), including the color-singlet P1[1]3 and color-octet S1[8]3 cc¯ Fock states as well as the mixing of the latter with the D1[8]3 state. Assuming the recently discovered X(3872) hadron to be the JPC=1++ charmonium state χc1(2P),

we perform a fit to the cross sections measured by the CDF, CMS, and

LHCb Collaborations. We obtain either an unacceptably high value of χ2, a value of |R′2P(0)|

incompatible with well-established potential models, or an intolerable

violation of the NRQCD velocity rules. We thus conclude that NLO NRQCD

is inconsistent with the hypothesis X(3872)≡χc1(2P).

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Universität Hamburg

Journal

Physical Review D

Band

Anzahl der Seiten

ISSN

1550-7998

DOI

https://doi.org/10.1103/PhysRevD.88.011501

Publikationsdatum

07-2013

Peer-reviewed

ÖFOS 2012

103036 Theoretische Physik, 103034 Teilchenphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/411bf05d-9986-4a86-a9e0-f0f0d66b0a62