Search for the chiral magnetic effect at the LHC with the CMS experiment
Searches for the chiral magnetic effect (CME) using charge-dependent azimuthal correlations with respect to event planes are presented in PbPb collisions at 5.02 TeV and pPb collisions at 5.02 and 8.16 TeV, with the CMS experiment at the LHC. The azimuthal correlations with respect to the second-...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Elsevier B.V.
2019
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/71940/ http://irep.iium.edu.my/71940/ http://irep.iium.edu.my/71940/ http://irep.iium.edu.my/71940/1/71940_Search%20for%20the%20chiral%20magnetic%20effect_article.pdf http://irep.iium.edu.my/71940/2/71940_Search%20for%20the%20chiral%20magnetic%20effect_wos.pdf http://irep.iium.edu.my/71940/3/71940_Search%20for%20the%20chiral%20magnetic%20effect_scopus.pdf |
| Summary: | Searches for the chiral magnetic effect (CME) using charge-dependent azimuthal correlations with respect to event
planes are presented in PbPb collisions at 5.02 TeV and pPb collisions at 5.02 and 8.16 TeV, with the CMS experiment
at the LHC. The azimuthal correlations with respect to the second- and third-order event planes are explored as a function of pseudorapidity, transverse momentum, and event multiplicity, which provides new insights into the underlying
background correlations. By employing an event-shape engineering technique, a linear dependence of charge-dependent
correlations on the second-order anisotropy flow (v2) is observed, and the upper limits on the v2-independent fraction,
which is directly related to the CME signal, are obtained at 95% confidence level for both pPb and PbPb collisions.
These results provide strong constraints on the search for the chiral magnetic effect at LHC energies, and establish new
guidelines for searches in future experiments. |
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