Observation of Charge-Dependent Azimuthal Correlations in p-Pb Collisions and Its Implication for the Search for the Chiral Magnetic Effect.
نویسندگان
- V Khachatryan
- A M Sirunyan
- A Tumasyan
- W Adam
- E Asilar
- T Bergauer
- J Brandstetter
- E Brondolin
- M Dragicevic
- J Erö
- M Flechl
- M Friedl
- R Frühwirth
- V M Ghete
- C Hartl
- N Hörmann
- J Hrubec
- M Jeitler
- A König
- I Krätschmer
- D Liko
- T Matsushita
- I Mikulec
- D Rabady
- N Rad
- B Rahbaran
- H Rohringer
- J Schieck
- J Strauss
- W Waltenberger
- C-E Wulz
- O Dvornikov
- V Makarenko
- V Zykunov
- V Mossolov
- N Shumeiko
- J Suarez Gonzalez
- S Alderweireldt
- E A De Wolf
- X Janssen
- J Lauwers
- M Van De Klundert
- H Van Haevermaet
- P Van Mechelen
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- A Van Spilbeeck
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- F Blekman
- J D'Hondt
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- I Van Parijs
- H Brun
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- I Khvastunov
- D Poyraz
- S Salva
- R Schöfbeck
- A Sharma
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چکیده
Charge-dependent azimuthal particle correlations with respect to the second-order event plane in p-Pb and PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV have been studied with the CMS experiment at the LHC. The measurement is performed with a three-particle correlation technique, using two particles with the same or opposite charge within the pseudorapidity range |η|<2.4, and a third particle measured in the hadron forward calorimeters (4.4<|η|<5). The observed differences between the same and opposite sign correlations, as functions of multiplicity and η gap between the two charged particles, are of similar magnitude in p-Pb and PbPb collisions at the same multiplicities. These results pose a challenge for the interpretation of charge-dependent azimuthal correlations in heavy ion collisions in terms of the chiral magnetic effect.
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ورودعنوان ژورنال:
- Physical review letters
دوره 118 12 شماره
صفحات -
تاریخ انتشار 2017