利用超外围重离子碰撞寻找类轴子粒子

Searching for Axionlike Particles with Ultraperipheral Heavy-Ion Collisions.

作者信息

Knapen Simon, Lin Tongyan, Lou Hou Keong, Melia Tom

机构信息

Department of Physics, University of California, Berkeley, California 94720, USA and Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.

出版信息

Phys Rev Lett. 2017 Apr 28;118(17):171801. doi: 10.1103/PhysRevLett.118.171801. Epub 2017 Apr 26.

DOI:10.1103/PhysRevLett.118.171801

PMID:28498682

Abstract

We show that ultraperipheral heavy-ion collisions at the Large Hadron Collider (LHC) can be used to search for axionlike particles with mass below 100 GeV. The Z^{4} enhanced photon-photon luminosity from the ions provides a large exclusive production rate, with a signature of a resonant pair of back-to-back photons and no other activity in the detector. In addition, we present both new and updated limits from recasting multiphoton searches at LEP II and the LHC, which are more stringent than those currently in the literature for the mass range 100 MeV to 100 GeV.

摘要

我们表明，大型强子对撞机（LHC）中的超外围重离子碰撞可用于寻找质量低于100 GeV的类轴子粒子。离子产生的Z⁴增强光子-光子亮度提供了较大的排他性产生率，其特征是一对背对背光子共振且探测器中无其他活动。此外，我们给出了通过重新分析LEP II和LHC的多光子搜索得到的新的和更新的限制，这些限制在100 MeV至100 GeV质量范围内比目前文献中的限制更为严格。