Tuesday, June 20, 2017, 10:30 AM (Beijing time)  seminar

The 60th HENPIC Seminar: New insights to the search for the anomalous chiral effects with small collision systems at CMS
       

Speaker：  Wei Li,Rice University

Date：Tuesday, June 20, 2017, 10:30 AM (Beijing time)

Download：http://pan.baidu.com/s/1geognuz (after June 18)

abstract:

The anomalous chiral effects, such as the chiral magnetic effect (CME) and chiral magnetic wave (CMW), have been suggested in heavy ion (AA) collisions, caused by the presence of a chirality imbalance under a strong magnetic field. While hints of the CME and CMW have been reported via measurements of charge-dependent azimuthal correlations, their
experimental observation in AA collisions remains inconclusive, mainly due to possible background contributions that are largely unconstrained. In recent years, collective behaviors in high-multiplicity proton-nucleus (pA) collisions have been observed, which resemble those in AA collisions. With a reduced magnetic field strength and a random field orientation, pA collisions provide us a novel approach of switching off the CME/CMW signal in a well-controlled way. In this talk, I will present latest measurements of charge-dependent azimuthal correlations and Fourier harmonics in pPb and PbPb collisions, with the CMS experiment at the LHC. I will discuss the implications of the results to the search for the CME and CMW, and also give an outlook on
future opportunities in discovering the anomalous chiral effects.