Heavy Quarkonium Hybrids

被引：11

作者：

Soto, Joan ^{[1
,2
]}

机构：

[1] Univ Barcelona, Dept Fis Quant & Astrofis, Marti i Franques 1, E-08028 Barcelona, Catalonia, Spain

[2] Fac Fis, Inst Ciencies Cosmos, Marti i Franques 1, Barcelona 08028, Catalonia, Spain

来源：

NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS | 2018年 / 294卷

关键词：

Heavy Quarkonium; Hybrids; NRQCD; pNRQCD; QCD string; STATES; MESONS; GLUONS; NRQCD; GLUE;

D O I：

10.1016/j.nuclphysbps.2018.03.020

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We report on a recent investigation on heavy quarkonium hybrids that goes beyond the usual Born-Oppenheimer approximation by including not only the mixing between nearby hybrid states but also the mixing with quarkonium states. We use a systematic effective field theory framework based on NRQCD together with lattice QCD inputs. Short and long distance constraints from weak coupling pNRQCD and the QCD effective string theory are also employed. We calculate the quarkonium and hybrid spectrum for charmonium and bottomonium, and estimate a number of decay widths. Most of the isospin zero XYZ resonances fit in our spectrum either as quarkonia or as hybrid states. The mixing of hybrid states with quarkonia produces enhanced spin symmetry violations, which are instrumental to understand certain decays. We also present new results on the hyperfine splittings.

引用

页码：87 / 94

页数：8

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