Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC

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; M. Zarucki; V. Chekhovsky; V. Mossolov; J. Suarez Gonzalez; E. A. DeWolf; D. Di Croce; X. Janssen; J. Lauwers; H. Van Haevermaet; P. Van Mechelen; N. Van Remortel; S. Abu Zeid; F. Blekman; J. D'Hondt; I. De Bruyn; J. De Clercq; K. Deroover; G. Flouris; D. Lontkovskyi; S. Lowette; S. Moortgat; L. Moreels; Q. Python; K. Skovpen; S. Tavernier; W. Van Doninck; P. Van Mulders; I. Van Parijs; D. Beghin; H. Brun; B. Clerbaux; G. De Lentdecker; H. Delannoy; G. Fasanella; L. Favart; R. Goldouzian; A. Grebenyuk; G. Karapostoli; T. Lenzi; J. Luetic; T. Maerschalk; A. Marinov; A. Randle-Conde; C. Vander Velde; P. Vanlaer; D. Vannerom; R. Yonamine; F. Zenoni; F. Zhang; A. Cimmino; T. Cornelis; D. Dobur; A. Fagot; M. Gul; I. Khvastunov; D. Poyraz; C. Roskas; S. Salva; M. Tytgat; W. Verbeke; N. Zaganidis; H. Bakhshiansohi; O. Bondu; S. Brochet; G. Bruno; C. Caputo; A. Caudron; S. De Visscher; C. Delaere; M. Delcourt; B. Francois; A. Giammanco; H. Saka; S. Salur; S. Schnetzer; D. Sheffield; S. Somalwar; R. Stone; S. Thomas; P. Thomassen; M. Walker; A. G. Delannoy; M. Foerster; J. Heideman; G. Riley; K. Rose; S. Spanier; K. Thapa; O. Bouhali; A. Castaneda Hernandez; A. Celik; M. Dalchenko; M. De Mattia; A. Delgado; S. Dildick; R. Eusebi; J. Gilmore; T. Huang; T. Kamon; R. Mueller; Y. Pakhotin; R. Patel; A. Perloff; L. Perniè; D. Rathjens; A. Safonov; A. Tatarinov; K. A. Ulmer; N. Akchurin; J. Damgov; F. De Guio; P. R. Dudero; J. Faulkner; E. Gurpinar; S. Kunori; K. Lamichhane; S. W. Lee; T. Libeiro; T. Peltola; S. Undleeb; I. Volobouev; Z. Wang; S. Greene; A. Gurrola; R. Janjam; W. Johns; C. Maguire; A. Melo; H. Ni; P. Sheldon; S. Tuo; J. Velkovska; Q. Xu; M. W. Arenton; P. Barria; B. Cox; R. Hirosky; A. Ledovskoy; H. Li; C. Neu; T. Sinthuprasith; Y. Wang; E. Wolfe; F. Xia; R. Harr; P. E. Karchin; J. Sturdy; S. Zaleski; M. Brodski; J. Buchanan; C. Caillol; S. Dasu; L. Dodd; S. Duric; B. Gomber; M. Grothe; M. Herndon; A. Hervé; U. Hussain; P. Klabbers; A. Lanaro; A. Levine; K. Long; R. Loveless; G. A. Pierro; G. Polese; T. Ruggles; A. Savin; N. Smith; W. H. Smith; D. Taylor; N. Woods

Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC

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. LikoT. Matsushita, I. Mikulec, D. Rabady, N. Rad, B. Rahbaran, H. Rohringer, J. Schieck, J. Strauss, W. Waltenberger, C. E. Wulz, M. Zarucki, V. Chekhovsky, V. Mossolov, J. Suarez Gonzalez, E. A. DeWolf, D. Di Croce, X. Janssen, J. Lauwers, H. Van Haevermaet, P. Van Mechelen, N. Van Remortel, S. Abu Zeid, F. Blekman, J. D'Hondt, I. De Bruyn, J. De Clercq, K. Deroover, G. Flouris, D. Lontkovskyi, S. Lowette, S. Moortgat, L. Moreels, Q. Python, K. Skovpen, S. Tavernier, W. Van Doninck, P. Van Mulders, I. Van Parijs, D. Beghin, H. Brun, B. Clerbaux, G. De Lentdecker, H. Delannoy, G. Fasanella, L. Favart, R. Goldouzian, A. Grebenyuk, G. Karapostoli, T. Lenzi, J. Luetic, T. Maerschalk, A. Marinov, A. Randle-Conde, C. Vander Velde, P. Vanlaer, D. Vannerom, R. Yonamine, F. Zenoni, F. Zhang, A. Cimmino, T. Cornelis, D. Dobur, A. Fagot, M. Gul, I. Khvastunov, D. Poyraz, C. Roskas, S. Salva, M. Tytgat, W. Verbeke, N. Zaganidis, H. Bakhshiansohi, O. Bondu, S. Brochet, G. Bruno, C. Caputo, A. Caudron, S. De Visscher, C. Delaere, M. Delcourt, B. Francois, A. Giammanco, H. Saka, S. Salur, S. Schnetzer, D. Sheffield, S. Somalwar, R. Stone, S. Thomas, P. Thomassen, M. Walker, A. G. Delannoy, M. Foerster, J. Heideman, G. Riley, K. Rose, S. Spanier, K. Thapa, O. Bouhali, A. Castaneda Hernandez, A. Celik, M. Dalchenko, M. De Mattia, A. Delgado, S. Dildick, R. Eusebi, J. Gilmore, T. Huang, T. Kamon, R. Mueller, Y. Pakhotin, R. Patel, A. Perloff, L. Perniè, D. Rathjens, A. Safonov, A. Tatarinov, K. A. Ulmer, N. Akchurin, J. Damgov, F. De Guio, P. R. Dudero, J. Faulkner, E. Gurpinar, S. Kunori, K. Lamichhane, S. W. Lee, T. Libeiro, T. Peltola, S. Undleeb, I. Volobouev, Z. Wang, S. Greene, A. Gurrola, R. Janjam, W. Johns, C. Maguire, A. Melo, H. Ni, P. Sheldon, S. Tuo, J. Velkovska, Q. Xu, M. W. Arenton, P. Barria, B. Cox, R. Hirosky, A. Ledovskoy, H. Li, C. Neu, T. Sinthuprasith, Y. Wang, E. Wolfe, F. Xia, R. Harr, P. E. Karchin, J. Sturdy, S. Zaleski, M. Brodski, J. Buchanan, C. Caillol, S. Dasu, L. Dodd, S. Duric, B. Gomber, M. Grothe, M. Herndon, A. Hervé, U. Hussain, P. Klabbers, A. Lanaro, A. Levine, K. Long, R. Loveless, G. A. Pierro, G. Polese, T. Ruggles, A. Savin, N. Smith, W. H. Smith, D. Taylor, N. Woods

Research output: Contribution to journal › Article › peer-review

Abstract

Charge-dependent azimuthal correlations of same- and opposite-sign pairs with respect to the second- and third-order event planes have been measured in pPb collisions at √s_NN= 8.16 TeV and PbPb collisions at 5.02 TeV with the CMS experiment at the LHC. The measurement is motivated by the search for the charge separation phenomenon predicted by the chiral magnetic effect (CME) in heavy ion collisions. Three- and two-particle azimuthal correlators are extracted as functions of the pseudorapidity difference, the transverse momentum (p_T) difference, and the p_Taverage of same- and opposite-charge pairs in various event multiplicity ranges. The data suggest that the charge-dependent three-particle correlators with respect to the secondand third-order event planes share a common origin, predominantly arising from charge-dependent two-particle azimuthal correlations coupled with an anisotropic flow. The CME is expected to lead to a v₂-independent three-particle correlation when the magnetic field is fixed. Using an event shape engineering technique, upper limits on the v₂-independent fraction of the three-particle correlator are estimated to be 13% for pPb and 7% for PbPb collisions at 95% confidence level. The results of this analysis, both the dominance of two-particle correlations as a source of the three-particle results and the similarities seen between PbPb and pPb, provide stringent constraints on the origin of charge-dependent three-particle azimuthal correlations and challenge their interpretation as arising from a chiral magnetic effect in heavy ion collisions.

Original language	English
Journal	Unknown Journal
State	Published - Aug 4 2017

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Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V. M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., König, A., Krätschmer, I., ... Woods, N. (2017). Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC. Unknown Journal.

Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Asilar, E. ; Bergauer, T. ; Brandstetter, J. ; Brondolin, E. ; Dragicevic, M. ; Erö, J. ; Flechl, M. ; Friedl, M. ; Frühwirth, R. ; Ghete, V. M. ; Hartl, C. ; Hörmann, N. ; Hrubec, J. ; Jeitler, M. ; König, A. ; Krätschmer, I. ; Liko, D. ; Matsushita, T. ; Mikulec, I. ; Rabady, D. ; Rad, N. ; Rahbaran, B. ; Rohringer, H. ; Schieck, J. ; Strauss, J. ; Waltenberger, W. ; Wulz, C. E. ; Zarucki, M. ; Chekhovsky, V. ; Mossolov, V. ; Suarez Gonzalez, J. ; DeWolf, E. A. ; Di Croce, D. ; Janssen, X. ; Lauwers, J. ; Van Haevermaet, H. ; Van Mechelen, P. ; Van Remortel, N. ; Abu Zeid, S. ; Blekman, F. ; D'Hondt, J. ; De Bruyn, I. ; De Clercq, J. ; Deroover, K. ; Flouris, G. ; Lontkovskyi, D. ; Lowette, S. ; Moortgat, S. ; Moreels, L. ; Python, Q. ; Skovpen, K. ; Tavernier, S. ; Van Doninck, W. ; Van Mulders, P. ; Van Parijs, I. ; Beghin, D. ; Brun, H. ; Clerbaux, B. ; De Lentdecker, G. ; Delannoy, H. ; Fasanella, G. ; Favart, L. ; Goldouzian, R. ; Grebenyuk, A. ; Karapostoli, G. ; Lenzi, T. ; Luetic, J. ; Maerschalk, T. ; Marinov, A. ; Randle-Conde, A. ; Vander Velde, C. ; Vanlaer, P. ; Vannerom, D. ; Yonamine, R. ; Zenoni, F. ; Zhang, F. ; Cimmino, A. ; Cornelis, T. ; Dobur, D. ; Fagot, A. ; Gul, M. ; Khvastunov, I. ; Poyraz, D. ; Roskas, C. ; Salva, S. ; Tytgat, M. ; Verbeke, W. ; Zaganidis, N. ; Bakhshiansohi, H. ; Bondu, O. ; Brochet, S. ; Bruno, G. ; Caputo, C. ; Caudron, A. ; De Visscher, S. ; Delaere, C. ; Delcourt, M. ; Francois, B. ; Giammanco, A. ; Saka, H. ; Salur, S. ; Schnetzer, S. ; Sheffield, D. ; Somalwar, S. ; Stone, R. ; Thomas, S. ; Thomassen, P. ; Walker, M. ; Delannoy, A. G. ; Foerster, M. ; Heideman, J. ; Riley, G. ; Rose, K. ; Spanier, S. ; Thapa, K. ; Bouhali, O. ; Castaneda Hernandez, A. ; Celik, A. ; Dalchenko, M. ; De Mattia, M. ; Delgado, A. ; Dildick, S. ; Eusebi, R. ; Gilmore, J. ; Huang, T. ; Kamon, T. ; Mueller, R. ; Pakhotin, Y. ; Patel, R. ; Perloff, A. ; Perniè, L. ; Rathjens, D. ; Safonov, A. ; Tatarinov, A. ; Ulmer, K. A. ; Akchurin, N. ; Damgov, J. ; De Guio, F. ; Dudero, P. R. ; Faulkner, J. ; Gurpinar, E. ; Kunori, S. ; Lamichhane, K. ; Lee, S. W. ; Libeiro, T. ; Peltola, T. ; Undleeb, S. ; Volobouev, I. ; Wang, Z. ; Greene, S. ; Gurrola, A. ; Janjam, R. ; Johns, W. ; Maguire, C. ; Melo, A. ; Ni, H. ; Sheldon, P. ; Tuo, S. ; Velkovska, J. ; Xu, Q. ; Arenton, M. W. ; Barria, P. ; Cox, B. ; Hirosky, R. ; Ledovskoy, A. ; Li, H. ; Neu, C. ; Sinthuprasith, T. ; Wang, Y. ; Wolfe, E. ; Xia, F. ; Harr, R. ; Karchin, P. E. ; Sturdy, J. ; Zaleski, S. ; Brodski, M. ; Buchanan, J. ; Caillol, C. ; Dasu, S. ; Dodd, L. ; Duric, S. ; Gomber, B. ; Grothe, M. ; Herndon, M. ; Hervé, A. ; Hussain, U. ; Klabbers, P. ; Lanaro, A. ; Levine, A. ; Long, K. ; Loveless, R. ; Pierro, G. A. ; Polese, G. ; Ruggles, T. ; Savin, A. ; Smith, N. ; Smith, W. H. ; Taylor, D. ; Woods, N. / Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC. In: Unknown Journal. 2017.

@article{582e5a227ca143848f316646b53ba0bc,

title = "Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC",

abstract = "Charge-dependent azimuthal correlations of same- and opposite-sign pairs with respect to the second- and third-order event planes have been measured in pPb collisions at √sNN= 8.16 TeV and PbPb collisions at 5.02 TeV with the CMS experiment at the LHC. The measurement is motivated by the search for the charge separation phenomenon predicted by the chiral magnetic effect (CME) in heavy ion collisions. Three- and two-particle azimuthal correlators are extracted as functions of the pseudorapidity difference, the transverse momentum (pT) difference, and the pTaverage of same- and opposite-charge pairs in various event multiplicity ranges. The data suggest that the charge-dependent three-particle correlators with respect to the secondand third-order event planes share a common origin, predominantly arising from charge-dependent two-particle azimuthal correlations coupled with an anisotropic flow. The CME is expected to lead to a v2-independent three-particle correlation when the magnetic field is fixed. Using an event shape engineering technique, upper limits on the v2-independent fraction of the three-particle correlator are estimated to be 13% for pPb and 7% for PbPb collisions at 95% confidence level. The results of this analysis, both the dominance of two-particle correlations as a source of the three-particle results and the similarities seen between PbPb and pPb, provide stringent constraints on the origin of charge-dependent three-particle azimuthal correlations and challenge their interpretation as arising from a chiral magnetic effect in heavy ion collisions.",

author = "Sirunyan, {A. M.} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, {V. M.} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and N. Rad and B. Rahbaran and H. Rohringer and J. Schieck and J. Strauss and W. Waltenberger and Wulz, {C. E.} and M. Zarucki and V. Chekhovsky and V. Mossolov and {Suarez Gonzalez}, J. and DeWolf, {E. A.} and {Di Croce}, D. and X. Janssen and J. Lauwers and {Van Haevermaet}, H. and {Van Mechelen}, P. and {Van Remortel}, N. and {Abu Zeid}, S. and F. Blekman and J. D'Hondt and {De Bruyn}, I. and {De Clercq}, J. and K. Deroover and G. Flouris and D. Lontkovskyi and S. Lowette and S. Moortgat and L. Moreels and Q. Python and K. Skovpen and S. Tavernier and {Van Doninck}, W. and {Van Mulders}, P. and {Van Parijs}, I. and D. Beghin and H. Brun and B. Clerbaux and {De Lentdecker}, G. and H. Delannoy and G. Fasanella and L. Favart and R. Goldouzian and A. Grebenyuk and G. Karapostoli and T. Lenzi and J. Luetic and T. Maerschalk and A. Marinov and A. Randle-Conde and {Vander Velde}, C. and P. Vanlaer and D. Vannerom and R. Yonamine and F. Zenoni and F. Zhang and A. Cimmino and T. Cornelis and D. Dobur and A. Fagot and M. Gul and I. Khvastunov and D. Poyraz and C. Roskas and S. Salva and M. Tytgat and W. Verbeke and N. Zaganidis and H. Bakhshiansohi and O. Bondu and S. Brochet and G. Bruno and C. Caputo and A. Caudron and {De Visscher}, S. and C. Delaere and M. Delcourt and B. Francois and A. Giammanco and H. Saka and S. Salur and S. Schnetzer and D. Sheffield and S. Somalwar and R. Stone and S. Thomas and P. Thomassen and M. Walker and Delannoy, {A. G.} and M. Foerster and J. Heideman and G. Riley and K. Rose and S. Spanier and K. Thapa and O. Bouhali and {Castaneda Hernandez}, A. and A. Celik and M. Dalchenko and {De Mattia}, M. and A. Delgado and S. Dildick and R. Eusebi and J. Gilmore and T. Huang and T. Kamon and R. Mueller and Y. Pakhotin and R. Patel and A. Perloff and L. Perni{\`e} and D. Rathjens and A. Safonov and A. Tatarinov and Ulmer, {K. A.} and N. Akchurin and J. Damgov and {De Guio}, F. and Dudero, {P. R.} and J. Faulkner and E. Gurpinar and S. Kunori and K. Lamichhane and Lee, {S. W.} and T. Libeiro and T. Peltola and S. Undleeb and I. Volobouev and Z. Wang and S. Greene and A. Gurrola and R. Janjam and W. Johns and C. Maguire and A. Melo and H. Ni and P. Sheldon and S. Tuo and J. Velkovska and Q. Xu and Arenton, {M. W.} and P. Barria and B. Cox and R. Hirosky and A. Ledovskoy and H. Li and C. Neu and T. Sinthuprasith and Y. Wang and E. Wolfe and F. Xia and R. Harr and Karchin, {P. E.} and J. Sturdy and S. Zaleski and M. Brodski and J. Buchanan and C. Caillol and S. Dasu and L. Dodd and S. Duric and B. Gomber and M. Grothe and M. Herndon and A. Herv{\'e} and U. Hussain and P. Klabbers and A. Lanaro and A. Levine and K. Long and R. Loveless and Pierro, {G. A.} and G. Polese and T. Ruggles and A. Savin and N. Smith and Smith, {W. H.} and D. Taylor and N. Woods",

year = "2017",

month = aug,

day = "4",

language = "English",

journal = "Unknown Journal",

}

Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Waltenberger, W, Wulz, CE, Zarucki, M, Chekhovsky, V, Mossolov, V, Suarez Gonzalez, J, DeWolf, EA, Di Croce, D, Janssen, X, Lauwers, J, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Abu Zeid, S, Blekman, F, D'Hondt, J, De Bruyn, I, De Clercq, J, Deroover, K, Flouris, G, Lontkovskyi, D, Lowette, S, Moortgat, S, Moreels, L, Python, Q, Skovpen, K, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Beghin, D, Brun, H, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Luetic, J, Maerschalk, T, Marinov, A, Randle-Conde, A, Vander Velde, C, Vanlaer, P, Vannerom, D, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Gul, M, Khvastunov, I, Poyraz, D, Roskas, C, Salva, S, Tytgat, M, Verbeke, W, Zaganidis, N, Bakhshiansohi, H, Bondu, O, Brochet, S, Bruno, G, Caputo, C, Caudron, A, De Visscher, S, Delaere, C, Delcourt, M, Francois, B, Giammanco, A, Saka, H, Salur, S, Schnetzer, S, Sheffield, D, Somalwar, S, Stone, R, Thomas, S, Thomassen, P, Walker, M, Delannoy, AG, Foerster, M, Heideman, J, Riley, G, Rose, K, Spanier, S, Thapa, K, Bouhali, O, Castaneda Hernandez, A, Celik, A, Dalchenko, M, De Mattia, M, Delgado, A, Dildick, S, Eusebi, R, Gilmore, J, Huang, T, Kamon, T, Mueller, R, Pakhotin, Y, Patel, R, Perloff, A, Perniè, L, Rathjens, D, Safonov, A, Tatarinov, A, Ulmer, KA, Akchurin, N, Damgov, J, De Guio, F, Dudero, PR, Faulkner, J, Gurpinar, E, Kunori, S, Lamichhane, K, Lee, SW, Libeiro, T, Peltola, T, Undleeb, S, Volobouev, I, Wang, Z, Greene, S, Gurrola, A, Janjam, R, Johns, W, Maguire, C, Melo, A, Ni, H, Sheldon, P, Tuo, S, Velkovska, J, Xu, Q, Arenton, MW, Barria, P, Cox, B, Hirosky, R, Ledovskoy, A, Li, H, Neu, C, Sinthuprasith, T, Wang, Y, Wolfe, E, Xia, F, Harr, R, Karchin, PE, Sturdy, J, Zaleski, S, Brodski, M, Buchanan, J, Caillol, C, Dasu, S, Dodd, L, Duric, S, Gomber, B, Grothe, M, Herndon, M, Hervé, A, Hussain, U, Klabbers, P, Lanaro, A, Levine, A, Long, K, Loveless, R, Pierro, GA, Polese, G, Ruggles, T, Savin, A, Smith, N, Smith, WH, Taylor, D & Woods, N 2017, 'Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC', Unknown Journal.

Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC. / Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; König, A.; Krätschmer, I.; Liko, D.; Matsushita, T.; Mikulec, I.; Rabady, D.; Rad, N.; Rahbaran, B.; Rohringer, H.; Schieck, J.; Strauss, J.; Waltenberger, W.; Wulz, C. E.; Zarucki, M.; Chekhovsky, V.; Mossolov, V.; Suarez Gonzalez, J.; DeWolf, E. A.; Di Croce, D.; Janssen, X.; Lauwers, J.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; De Bruyn, I.; De Clercq, J.; Deroover, K.; Flouris, G.; Lontkovskyi, D.; Lowette, S.; Moortgat, S.; Moreels, L.; Python, Q.; Skovpen, K.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Beghin, D.; Brun, H.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Karapostoli, G.; Lenzi, T.; Luetic, J.; Maerschalk, T.; Marinov, A.; Randle-Conde, A.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Gul, M.; Khvastunov, I.; Poyraz, D.; Roskas, C.; Salva, S.; Tytgat, M.; Verbeke, W.; Zaganidis, N.; Bakhshiansohi, H.; Bondu, O.; Brochet, S.; Bruno, G.; Caputo, C.; Caudron, A.; De Visscher, S.; Delaere, C.; Delcourt, M.; Francois, B.; Giammanco, A.; Saka, H.; Salur, S.; Schnetzer, S.; Sheffield, D.; Somalwar, S.; Stone, R.; Thomas, S.; Thomassen, P.; Walker, M.; Delannoy, A. G.; Foerster, M.; Heideman, J.; Riley, G.; Rose, K.; Spanier, S.; Thapa, K.; Bouhali, O.; Castaneda Hernandez, A.; Celik, A.; Dalchenko, M.; De Mattia, M.; Delgado, A.; Dildick, S.; Eusebi, R.; Gilmore, J.; Huang, T.; Kamon, T.; Mueller, R.; Pakhotin, Y.; Patel, R.; Perloff, A.; Perniè, L.; Rathjens, D.; Safonov, A.; Tatarinov, A.; Ulmer, K. A.; Akchurin, N.; Damgov, J.; De Guio, F.; Dudero, P. R.; Faulkner, J.; Gurpinar, E.; Kunori, S.; Lamichhane, K.; Lee, S. W.; Libeiro, T.; Peltola, T.; Undleeb, S.; Volobouev, I.; Wang, Z.; Greene, S.; Gurrola, A.; Janjam, R.; Johns, W.; Maguire, C.; Melo, A.; Ni, H.; Sheldon, P.; Tuo, S.; Velkovska, J.; Xu, Q.; Arenton, M. W.; Barria, P.; Cox, B.; Hirosky, R.; Ledovskoy, A.; Li, H.; Neu, C.; Sinthuprasith, T.; Wang, Y.; Wolfe, E.; Xia, F.; Harr, R.; Karchin, P. E.; Sturdy, J.; Zaleski, S.; Brodski, M.; Buchanan, J.; Caillol, C.; Dasu, S.; Dodd, L.; Duric, S.; Gomber, B.; Grothe, M.; Herndon, M.; Hervé, A.; Hussain, U.; Klabbers, P.; Lanaro, A.; Levine, A.; Long, K.; Loveless, R.; Pierro, G. A.; Polese, G.; Ruggles, T.; Savin, A.; Smith, N.; Smith, W. H.; Taylor, D.; Woods, N.

In: Unknown Journal, 04.08.2017.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Constraints on the chiral magnetic effect using charge-dependent azimuthal correlations in pPb and PbPb collisions at the LHC

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - König, A.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rad, N.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Strauss, J.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Chekhovsky, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - DeWolf, E. A.

AU - Di Croce, D.

AU - Janssen, X.

AU - Lauwers, J.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - Abu Zeid, S.

AU - Blekman, F.

AU - D'Hondt, J.

AU - De Bruyn, I.

AU - De Clercq, J.

AU - Deroover, K.

AU - Flouris, G.

AU - Lontkovskyi, D.

AU - Lowette, S.

AU - Moortgat, S.

AU - Moreels, L.

AU - Python, Q.

AU - Skovpen, K.

AU - Tavernier, S.

AU - Van Doninck, W.

AU - Van Mulders, P.

AU - Van Parijs, I.

AU - Beghin, D.

AU - Brun, H.

AU - Clerbaux, B.

AU - De Lentdecker, G.

AU - Delannoy, H.

AU - Fasanella, G.

AU - Favart, L.

AU - Goldouzian, R.

AU - Grebenyuk, A.

AU - Karapostoli, G.

AU - Lenzi, T.

AU - Luetic, J.

AU - Maerschalk, T.

AU - Marinov, A.

AU - Randle-Conde, A.

AU - Vander Velde, C.

AU - Vanlaer, P.

AU - Vannerom, D.

AU - Yonamine, R.

AU - Zenoni, F.

AU - Zhang, F.

AU - Cimmino, A.

AU - Cornelis, T.

AU - Dobur, D.

AU - Fagot, A.

AU - Gul, M.

AU - Khvastunov, I.

AU - Poyraz, D.

AU - Roskas, C.

AU - Salva, S.

AU - Tytgat, M.

AU - Verbeke, W.

AU - Zaganidis, N.

AU - Bakhshiansohi, H.

AU - Bondu, O.

AU - Brochet, S.

AU - Bruno, G.

AU - Caputo, C.

AU - Caudron, A.

AU - De Visscher, S.

AU - Delaere, C.

AU - Delcourt, M.

AU - Francois, B.

AU - Giammanco, A.

AU - Saka, H.

AU - Salur, S.

AU - Schnetzer, S.

AU - Sheffield, D.

AU - Somalwar, S.

AU - Stone, R.

AU - Thomas, S.

AU - Thomassen, P.

AU - Walker, M.

AU - Delannoy, A. G.

AU - Foerster, M.

AU - Heideman, J.

AU - Riley, G.

AU - Rose, K.

AU - Spanier, S.

AU - Thapa, K.

AU - Bouhali, O.

AU - Castaneda Hernandez, A.

AU - Celik, A.

AU - Dalchenko, M.

AU - De Mattia, M.

AU - Delgado, A.

AU - Dildick, S.

AU - Eusebi, R.

AU - Gilmore, J.

AU - Huang, T.

AU - Kamon, T.

AU - Mueller, R.

AU - Pakhotin, Y.

AU - Patel, R.

AU - Perloff, A.

AU - Perniè, L.

AU - Rathjens, D.

AU - Safonov, A.

AU - Tatarinov, A.

AU - Ulmer, K. A.

AU - Akchurin, N.

AU - Damgov, J.

AU - De Guio, F.

AU - Dudero, P. R.

AU - Faulkner, J.

AU - Gurpinar, E.

AU - Kunori, S.

AU - Lamichhane, K.

AU - Lee, S. W.

AU - Libeiro, T.

AU - Peltola, T.

AU - Undleeb, S.

AU - Volobouev, I.

AU - Wang, Z.

AU - Greene, S.

AU - Gurrola, A.

AU - Janjam, R.

AU - Johns, W.

AU - Maguire, C.

AU - Melo, A.

AU - Ni, H.

AU - Sheldon, P.

AU - Tuo, S.

AU - Velkovska, J.

AU - Xu, Q.

AU - Arenton, M. W.

AU - Barria, P.

AU - Cox, B.

AU - Hirosky, R.

AU - Ledovskoy, A.

AU - Li, H.

AU - Neu, C.

AU - Sinthuprasith, T.

AU - Wang, Y.

AU - Wolfe, E.

AU - Xia, F.

AU - Harr, R.

AU - Karchin, P. E.

AU - Sturdy, J.

AU - Zaleski, S.

AU - Brodski, M.

AU - Buchanan, J.

AU - Caillol, C.

AU - Dasu, S.

AU - Dodd, L.

AU - Duric, S.

AU - Gomber, B.

AU - Grothe, M.

AU - Herndon, M.

AU - Hervé, A.

AU - Hussain, U.

AU - Klabbers, P.

AU - Lanaro, A.

AU - Levine, A.

AU - Long, K.

AU - Loveless, R.

AU - Pierro, G. A.

AU - Polese, G.

AU - Ruggles, T.

AU - Savin, A.

AU - Smith, N.

AU - Smith, W. H.

AU - Taylor, D.

AU - Woods, N.

PY - 2017/8/4

Y1 - 2017/8/4

N2 - Charge-dependent azimuthal correlations of same- and opposite-sign pairs with respect to the second- and third-order event planes have been measured in pPb collisions at √sNN= 8.16 TeV and PbPb collisions at 5.02 TeV with the CMS experiment at the LHC. The measurement is motivated by the search for the charge separation phenomenon predicted by the chiral magnetic effect (CME) in heavy ion collisions. Three- and two-particle azimuthal correlators are extracted as functions of the pseudorapidity difference, the transverse momentum (pT) difference, and the pTaverage of same- and opposite-charge pairs in various event multiplicity ranges. The data suggest that the charge-dependent three-particle correlators with respect to the secondand third-order event planes share a common origin, predominantly arising from charge-dependent two-particle azimuthal correlations coupled with an anisotropic flow. The CME is expected to lead to a v2-independent three-particle correlation when the magnetic field is fixed. Using an event shape engineering technique, upper limits on the v2-independent fraction of the three-particle correlator are estimated to be 13% for pPb and 7% for PbPb collisions at 95% confidence level. The results of this analysis, both the dominance of two-particle correlations as a source of the three-particle results and the similarities seen between PbPb and pPb, provide stringent constraints on the origin of charge-dependent three-particle azimuthal correlations and challenge their interpretation as arising from a chiral magnetic effect in heavy ion collisions.

AB - Charge-dependent azimuthal correlations of same- and opposite-sign pairs with respect to the second- and third-order event planes have been measured in pPb collisions at √sNN= 8.16 TeV and PbPb collisions at 5.02 TeV with the CMS experiment at the LHC. The measurement is motivated by the search for the charge separation phenomenon predicted by the chiral magnetic effect (CME) in heavy ion collisions. Three- and two-particle azimuthal correlators are extracted as functions of the pseudorapidity difference, the transverse momentum (pT) difference, and the pTaverage of same- and opposite-charge pairs in various event multiplicity ranges. The data suggest that the charge-dependent three-particle correlators with respect to the secondand third-order event planes share a common origin, predominantly arising from charge-dependent two-particle azimuthal correlations coupled with an anisotropic flow. The CME is expected to lead to a v2-independent three-particle correlation when the magnetic field is fixed. Using an event shape engineering technique, upper limits on the v2-independent fraction of the three-particle correlator are estimated to be 13% for pPb and 7% for PbPb collisions at 95% confidence level. The results of this analysis, both the dominance of two-particle correlations as a source of the three-particle results and the similarities seen between PbPb and pPb, provide stringent constraints on the origin of charge-dependent three-particle azimuthal correlations and challenge their interpretation as arising from a chiral magnetic effect in heavy ion collisions.

UR - http://www.scopus.com/inward/record.url?scp=85094701707&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85094701707

JO - Unknown Journal

JF - Unknown Journal

ER -