Static hybrid potential in D dimensions at short distances

Autor(en)

Antonio Pineda, Maximilian Stahlhofen

Abstrakt

We compute the energy of a static hybrid, i.e., of a hybrid quarkonium with static quark and antiquark, at short distances in D = 4,3, dimensions. The soft contribution to this energy is the static potential of a color-octet quark-antiquark pair at short distances, which is known at two loops for arbitrary D. We have checked this expression employing thermal field theory methods. Using the effective field theory potential nonrelativistic QCD we calculate the ultrasoft contributions to the hybrid (and singlet) static energy at the two-loop level. We then present new results for the static hybrid energy/potential and the hybrid decay width in three and four dimensions. Finally we comment on the meaning of the perturbative results in two space-time dimensions, where the hybrid does not exist.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Universitat Autònoma de Barcelona

Journal

Physical Review D

Band

84

Anzahl der Seiten

15

ISSN

1550-7998

DOI

https://doi.org/10.1103/PhysRevD.84.034016

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103034 Teilchenphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/6d1597fe-ae95-4de7-8f00-ca5ba8cb204a