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Effects of Z(b) states and bottom meson loops on Upsilon(4S) ->Upsilon(1S,2S)pi(+) pi(-) transitions

文献类型：期刊论文

作者Meissner, UG; Chen, YH; Cleven, M; Daub, JT; Guo, FK; Hanhart, C; Kubis, B; Zou, BS; Chen, YH (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, D-53115 Bonn, Germany.; Chen, YH (reprint author), Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany.
刊名PHYSICAL REVIEW D
出版日期2017
卷号95期号:3页码:34022
DOIhttp://dx.doi.org/10.1103/PhysRevD.95.034022
英文摘要We study the dipion transitions Upsilon(4S) -> Upsilon(nS)pi(+) pi(-)(n = 1,2)In particular, we consider the effects of the two intermediate bottomoniumlike exotic states Z(b)(10610) and Z(b)(10650) as well as bottom meson loops. The strong pion-pion final-state interactions, especially including channel coupling to KK in the S wave, are taken into account model independently by using dispersion theory. Based on a nonrelativistic effective field theory we find that the contribution from the bottom meson loops is comparable to those from the chiral contact terms and the Z(b)-exchange terms. For the Upsilon(4S) -> Upsilon(2S)pi(+)pi(-) decay, the result shows that including the effects of the Zb exchange and the bottom meson loops can naturally reproduce the two-hump behavior of the pp mass spectra. Future angular distribution data are decisive for the identification of different production mechanisms. For the Upsilon(4S) -> Upsilon(1S)pi(+)pi(-) decay, we show that there is a narrow dip around 1 GeV in the pi pi invariant mass distribution, caused by the final- state interactions. The distribution is clearly different from that in similar transitions from lower. states, and needs to be verified by future data with high statistics. Also we predict the decay width and the dikaon mass distribution of the Upsilon(4S) -> Upsilon(1S)Kappa(+)Kappa(-) process.
学科主题Astronomy & Astrophysics ; Physics
语种英语
源URL[http://ir.itp.ac.cn/handle/311006/22121]  
专题理论物理研究所_理论物理所1978-2010年知识产出
通讯作者Chen, YH (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys Theorie, D-53115 Bonn, Germany.; Chen, YH (reprint author), Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany.
推荐引用方式
GB/T 7714		 Meissner, UG,Chen, YH,Cleven, M,et al. Effects of Z(b) states and bottom meson loops on Upsilon(4S) ->Upsilon(1S,2S)pi(+) pi(-) transitions[J]. PHYSICAL REVIEW D,2017,95(3):34022.
APA Meissner, UG.,Chen, YH.,Cleven, M.,Daub, JT.,Guo, FK.,...&Chen, YH .(2017).Effects of Z(b) states and bottom meson loops on Upsilon(4S) ->Upsilon(1S,2S)pi(+) pi(-) transitions.PHYSICAL REVIEW D,95(3),34022.
MLA Meissner, UG,et al."Effects of Z(b) states and bottom meson loops on Upsilon(4S) ->Upsilon(1S,2S)pi(+) pi(-) transitions".PHYSICAL REVIEW D 95.3(2017):34022.

入库方式： OAI收割

来源：理论物理研究所

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