BaBar实验寻找暗光子和长寿命粒子

doi:10.3969/j.issn.0253-2778.2016.07.010

中国科学技术大学学报 ›› 2016, Vol. 46 ›› Issue (7): 601-607.DOI: 10.3969/j.issn.0253-2778.2016.07.010

BaBar实验寻找暗光子和长寿命粒子

LUSIANI A.

1.高等师范学校，比萨 56125，意大利；2.意大利国家核物理研究院，比萨 56127，意大利

收稿日期:2015-11-30 修回日期:2016-04-20 出版日期:2016-07-31 发布日期:2016-07-31
作者简介:LUSIANI A., PhD. Research field: high energy physics. E-mail: alberto.lusiani@pi.infn.it

Search for dark photon and long-lived particles at BaBar

LUSIANI A.

1.Scuola Normale Superiore, piazza dei Cavalieri 7, Pisa PI 56125, Italy; 2.Instituto Nazionale di Fisica Nucleare, sezione di Pisa, Largo Bruno Pontecorvo 3, 56127 Pisa PI, Italy

Received:2015-11-30 Revised:2016-04-20 Online:2016-07-31 Published:2016-07-31

摘要/Abstract

摘要： 我们用SLAC国家实验室PEP-II上的BaBar探测器记录的全部大量干净的e+e-对撞事例，寻找一些暗物质理论模型提出的一种具有质量、衰变到e+e-或μ+μ-对的类光子粒子，并寻找很多新物理模型中预言的衰变到带相反电荷的费米子对的长寿命粒子.我们没有观测到信号，因此我们在90%的置信度下给出了几种产生率和一些新物理模型参数的上限.

关键词: 新物理, 暗物质, B工厂

Abstract: The complete large and clean sample of e+e- collisions recorded by the BaBar detector at PEP-II at the SLAC National Laboratory was used to search for a photon-like particle with mass and decaying into an e+e- or μ+μ- pair, which is proposed in some Dark Matter theory models, and to search for a long-lived particle that decays into an oppositely charged fermion pair, predicted in a number of New Physics models. We do not observe a significant signal and we set 90% confidence level upper limits of several production rates and on the parameters of some proposed New Physics models.

Key words: New Physics, Dark Matter, B-factory

LUSIANI A.，(BaBar合作组). BaBar实验寻找暗光子和长寿命粒子[J]. 中国科学技术大学学报, 2016, 46(7): 601-607.

LUSIANI A., (for the BaBar Collaboration). Search for dark photon and long-lived particles at BaBar[J]. Journal of University of Science and Technology of China, 2016, 46(7): 601-607.

[1]	PREZ DEL RO Elena (KLOE- 合作组). 在KLOE/KLOE-2实验中寻找暗传播子[J]. 中国科学技术大学学报, 2016, 46(7): 587-593.
[2]	王博群（Belle II 合作组）. Belle II实验和超级KEKB升级[J]. 中国科学技术大学学报, 2016, 46(7): 617-624.

BaBar实验寻找暗光子和长寿命粒子

Search for dark photon and long-lived particles at BaBar

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