HEAVY HYBRID STATES FROM NRQCD

Citation
T. Manke et al., HEAVY HYBRID STATES FROM NRQCD, Physical review. D. Particles and fields, 57(7), 1998, pp. 3829-3832
Citations number
27
Categorie Soggetti
Physics, Particles & Fields
ISSN journal
05562821
Volume
57
Issue
7
Year of publication
1998
Pages
3829 - 3832
Database
ISI
SICI code
0556-2821(1998)57:7<3829:HHSFN>2.0.ZU;2-T
Abstract
We present a quenched lattice calculation for the lowest lying <b(b)ov er bar>g-hybrid states in the framework of NRQCD using the leading ord er Hamiltonian up to O(m upsilon(2)). We demonstrate the existence of a nearly degenerate rotational band of states with an excitation energ y approximately 1.6 GeV above the Y ground state. This lies around the <B(B)over bar>(j)-threshold, but well above the <B(B)over bar>-thres hold. Therefore a heavy hybrid signal may well be detected if the cent er-of-mass energy in B-factories is raised a few hundred MeV to coinci de with other resonances above the 4S state. Our prediction is consist ent with most phenomenological models and lattice calculations carried out in the static limit. [S0556-2821(98)50707-2].