Bottomonium mesons and strategies for their observation

被引：137

作者：

Godfrey, Stephen ^{[1
]}

Moats, Kenneth ^{[1
]}

机构：

[1] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

HADRONIC TRANSITIONS; QUARKONIUM STATES; PP COLLISIONS; DECAY; ANNIHILATION; CHARMONIUM; MODEL; POSITRONIUM; ROOT-S=7; PHYSICS;

D O I：

10.1103/PhysRevD.92.054034

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The B-factories and Large Hadron Collider experiments have demonstrated the ability to observe and measure the properties of bottomonium mesons. In order to discover missing states it is useful to know their properties to develop a successful search strategy. To this end we calculate the masses and decay properties of excited bottomonium states. We use the relativized quark model to calculate the masses and wave functions and the P-3(0) quark-pair creation model to calculate decay widths to open bottom. We also summarize results for radiative transitions, annihilation decays, hadronic transitions and production cross sections which are used to develop strategies to find these states. We find that the b (b) over bar system has a rich spectroscopy that we expect to be substantially extended by the LHC and e(+)e(-) experiments in the near future. Some of the most promising possibilities at the LHC are observing the chi(b(1,2))(3P),chi(b(1,2))(4P) and eta(b)(3S) states in gamma mu(+)gamma(-)final states that proceed via radiative transitions through Upsilon(nS) intermediate states and 1(3)D(J) and 2(3)D(J) into gamma gamma mu(+)mu(-) final states proceeding via 1(3)P(J) -> 1(3)S(1) and 2(3)P(J) -> 2(3)S(1) intermediate states respectively. Some of the most interesting possibilities in e(+)e(-) collisions are studying the 1(3)D(J) states via 4 gamma cascades starting with the Upsilon(3S) and the 3(3)P(J) states in gamma gamma mu(+)mu(-) final states starting with the Upsilon(4S) and proceeding via Upsilon(nS) intermediate states. Completing the bottomonium spectrum is an important validation of lattice QCD calculations and a test of our understanding of bottomonium states in the context of the quark model.

引用

页数：39

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