Leading and next-to-leading order gluon polarization in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

C. Adolph; M. G. Alekseev; V. Yu Alexakhin; Yu Alexandrov; G. D. Alexeev; A. Amoroso; A. A. Antonov; A. Austregesilo; B. Badełek; F. Balestra; J. Barth; G. Baum; Y. Bedfer; A. Berlin; J. Bernhard; R. Bertini; M. Bettinelli; K. Bicker; J. Bieling; R. Birsa; J. Bisplinghoff; P. Bordalo; F. Bradamante; C. Braun; A. Bravar; A. Bressan; M. Büchele; E. Burtin; L. Capozza; M. Chiosso; S. U. Chung; A. Cicuttin; M. L. Crespo; S. Dalla Torre; S. Das; S. S. Dasgupta; S. Dasgupta; O. Yu Denisov; L. Dhara; S. V. Donskov; N. Doshita; V. Duic; W. Dünnweber; M. Dziewiecki; A. Efremov; C. Elia; P. D. Eversheim; W. Eyrich; M. Faessler; A. Ferrero; A. Filin; M. Finger; M. Finger; H. Fischer; C. Franco; N. Du Fresne Von Hohenesche; J. M. Friedrich; V. Frolov; R. Garfagnini; F. Gautheron; O. P. Gavrichtchouk; S. Gerassimov; R. Geyer; M. Giorgi; I. Gnesi; B. Gobbo; S. Goertz; S. Grabmüller; A. Grasso; B. Grube; R. Gushterski; A. Guskov; T. Guthörl; F. Haas; D. Von Harrach; F. H. Heinsius; F. Herrmann; C. Heß; F. Hinterberger; N. Horikawa; Ch Höppner; N. D'Hose; S. Huber; S. Ishimoto; O. Ivanov; Yu Ivanshin; T. Iwata; R. Jahn; V. Jary; P. Jasinski; R. Joosten; E. Kabuß; D. Kang; B. Ketzer; G. V. Khaustov; Yu A. Khokhlov; Yu Kisselev; F. Klein; K. Klimaszewski; S. Koblitz; J. H. Koivuniemi; V. N. Kolosov; K. Kondo; K. Königsmann; I. Konorov; V. F. Konstantinov; A. Korzenev; A. M. Kotzinian; O. Kouznetsov; M. Krämer; Z. V. Kroumchtein; F. Kunne; K. Kurek; L. Lauser; A. A. Lednev; A. Lehmann; S. Levorato; J. Lichtenstadt; T. Liska; A. Maggiora; A. Magnon; N. Makke; G. K. Mallot; A. Mann; C. Marchand; A. Martin; J. Marzec; T. Matsuda; G. Meshcheryakov; W. Meyer; T. Michigami; Yu V. Mikhailov; A. Morreale; A. Mutter; A. Nagaytsev; T. Nagel; F. Nerling; S. Neubert; D. Neyret; V. I. Nikolaenko; W. D. Nowak; A. S. Nunes; A. G. Olshevsky; M. Ostrick; A. Padee; R. Panknin; D. Panzieri; B. Parsamyan; S. Paul; E. Perevalova; G. Pesaro; D. V. Peshekhonov; G. Piragino; S. Platchkov; J. Pochodzalla; J. Polak; V. A. Polyakov; J. Pretz; M. Quaresma; C. Quintans; J. F. Rajotte; S. Ramos; V. Rapatsky; G. Reicherz; E. Rocco; E. Rondio; N. S. Rossiyskaya; D. I. Ryabchikov; V. D. Samoylenko; A. Sandacz; M. G. Sapozhnikov; S. Sarkar; I. A. Savin; G. Sbrizzai; P. Schiavon; C. Schill; T. Schlüter; A. Schmidt; K. Schmidt; L. Schmitt; H. Schmïden; K. Schönning; S. Schopferer; M. Schott; O. Yu Shevchenko; L. Silva; L. Sinha; A. N. Sissakian; M. Slunecka; G. I. Smirnov; S. Sosio; F. Sozzi; A. Srnka; L. Steiger; M. Stolarski; M. Sulc; R. Sulej; H. Suzuki; P. Sznajder; S. Takekawa; J. Ter Wolbeek; S. Tessaro; F. Tessarotto; L. G. Tkatchev; S. Uhl; I. Uman; M. Vandenbroucke; M. Virius; N. V. Vlassov; L. Wang; T. Weisrock; M. Wilfert; R. Windmolders; W. Wiślicki; H. Wollny; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; M. Ziembicki; N. Zhuravlev; A. Zvyagin

doi:10.1103/PhysRevD.87.052018

Leading and next-to-leading order gluon polarization in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

C. Adolph^*, M. G. Alekseev, V. Yu Alexakhin, Yu Alexandrov, G. D. Alexeev, A. Amoroso, A. A. Antonov, A. Austregesilo, B. Badełek, F. Balestra, J. Barth, G. Baum, Y. Bedfer, A. Berlin, J. Bernhard, R. Bertini, M. Bettinelli, K. Bicker, J. Bieling, R. BirsaJ. Bisplinghoff, P. Bordalo, F. Bradamante, C. Braun, A. Bravar, A. Bressan, M. Büchele, E. Burtin, L. Capozza, M. Chiosso, S. U. Chung, A. Cicuttin, M. L. Crespo, S. Dalla Torre, S. Das, S. S. Dasgupta, S. Dasgupta, O. Yu Denisov, L. Dhara, S. V. Donskov, N. Doshita, V. Duic, W. Dünnweber, M. Dziewiecki, A. Efremov, C. Elia, P. D. Eversheim, W. Eyrich, M. Faessler, A. Ferrero, A. Filin, M. Finger, M. Finger, H. Fischer, C. Franco, N. Du Fresne Von Hohenesche, J. M. Friedrich, V. Frolov, R. Garfagnini, F. Gautheron, O. P. Gavrichtchouk, S. Gerassimov, R. Geyer, M. Giorgi, I. Gnesi, B. Gobbo, S. Goertz, S. Grabmüller, A. Grasso, B. Grube, R. Gushterski, A. Guskov, T. Guthörl, F. Haas, D. Von Harrach, F. H. Heinsius, F. Herrmann, C. Heß, F. Hinterberger, N. Horikawa, Ch Höppner, N. D'Hose, S. Huber, S. Ishimoto, O. Ivanov, Yu Ivanshin, T. Iwata, R. Jahn, V. Jary, P. Jasinski, R. Joosten, E. Kabuß, D. Kang, B. Ketzer, G. V. Khaustov, Yu A. Khokhlov, Yu Kisselev, F. Klein, K. Klimaszewski, S. Koblitz, J. H. Koivuniemi, V. N. Kolosov, K. Kondo, K. Königsmann, I. Konorov, V. F. Konstantinov, A. Korzenev, A. M. Kotzinian, O. Kouznetsov, M. Krämer, Z. V. Kroumchtein, F. Kunne, K. Kurek, L. Lauser, A. A. Lednev, A. Lehmann, S. Levorato, J. Lichtenstadt, T. Liska, A. Maggiora, A. Magnon, N. Makke, G. K. Mallot, A. Mann, C. Marchand, A. Martin, J. Marzec, T. Matsuda, G. Meshcheryakov, W. Meyer, T. Michigami, Yu V. Mikhailov, A. Morreale, A. Mutter, A. Nagaytsev, T. Nagel, F. Nerling, S. Neubert, D. Neyret, V. I. Nikolaenko, W. D. Nowak, A. S. Nunes, A. G. Olshevsky, M. Ostrick, A. Padee, R. Panknin, D. Panzieri, B. Parsamyan, S. Paul, E. Perevalova, G. Pesaro, D. V. Peshekhonov, G. Piragino, S. Platchkov, J. Pochodzalla, J. Polak, V. A. Polyakov, J. Pretz, M. Quaresma, C. Quintans, J. F. Rajotte, S. Ramos, V. Rapatsky, G. Reicherz, E. Rocco, E. Rondio, N. S. Rossiyskaya, D. I. Ryabchikov, V. D. Samoylenko, A. Sandacz, M. G. Sapozhnikov, S. Sarkar, I. A. Savin, G. Sbrizzai, P. Schiavon, C. Schill, T. Schlüter, A. Schmidt, K. Schmidt, L. Schmitt, H. Schmïden, K. Schönning, S. Schopferer, M. Schott, O. Yu Shevchenko, L. Silva, L. Sinha, A. N. Sissakian, M. Slunecka, G. I. Smirnov, S. Sosio, F. Sozzi, A. Srnka, L. Steiger, M. Stolarski, M. Sulc, R. Sulej, H. Suzuki, P. Sznajder, S. Takekawa, J. Ter Wolbeek, S. Tessaro, F. Tessarotto, L. G. Tkatchev, S. Uhl, I. Uman, M. Vandenbroucke, M. Virius, N. V. Vlassov, L. Wang, T. Weisrock, M. Wilfert, R. Windmolders, W. Wiślicki, H. Wollny, K. Zaremba, M. Zavertyaev, E. Zemlyanichkina, M. Ziembicki, N. Zhuravlev, A. Zvyagin

^*Corresponding author for this work

School of Physics and Astronomy

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

61 Scopus citations

Abstract

The gluon polarization in the nucleon was measured using open charm production by scattering 160 GeV/c polarized muons off longitudinally polarized protons or deuterons. The data were taken by the COMPASS Collaboration between 2002 and 2007. A detailed account is given of the analysis method that includes the application of neural networks. Several decay channels of D0 mesons are investigated. Longitudinal spin asymmetries of the D meson production cross sections are extracted in bins of D0 transverse momentum and energy. At leading order QCD accuracy, the average gluon polarization is determined as Δg/g^LO=-0.06±0.21(stat.)±0.08(syst.) at the scale μ²≈13 (GeV/c)² and an average gluon momentum fraction x≈0.11. The average gluon polarization is also obtained at next-to-leading order QCD accuracy as Δg/g NLO=-0.13±0.15(stat.) ±0.15(syst.) at the scale μ²≈13 (GeV/c)² and x≈0.20.

Original language	English
Article number	052018
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	87
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.87.052018
State	Published - 25 Mar 2013

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10.1103/PhysRevD.87.052018

Cite this

Adolph, C., Alekseev, M. G., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Antonov, A. A., Austregesilo, A., Badełek, B., Balestra, F., Barth, J., Baum, G., Bedfer, Y., Berlin, A., Bernhard, J., Bertini, R., Bettinelli, M., Bicker, K., Bieling, J., ... Zvyagin, A. (2013). Leading and next-to-leading order gluon polarization in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Physical Review D - Particles, Fields, Gravitation and Cosmology, 87(5), Article 052018. https://doi.org/10.1103/PhysRevD.87.052018

@article{af173e56cc794329adb01a360929b362,

title = "Leading and next-to-leading order gluon polarization in the nucleon and longitudinal double spin asymmetries from open charm muoproduction",

abstract = "The gluon polarization in the nucleon was measured using open charm production by scattering 160 GeV/c polarized muons off longitudinally polarized protons or deuterons. The data were taken by the COMPASS Collaboration between 2002 and 2007. A detailed account is given of the analysis method that includes the application of neural networks. Several decay channels of D0 mesons are investigated. Longitudinal spin asymmetries of the D meson production cross sections are extracted in bins of D0 transverse momentum and energy. At leading order QCD accuracy, the average gluon polarization is determined as Δg/gLO=-0.06±0.21(stat.)±0.08(syst.) at the scale μ2≈13 (GeV/c)2 and an average gluon momentum fraction x≈0.11. The average gluon polarization is also obtained at next-to-leading order QCD accuracy as Δg/g NLO=-0.13±0.15(stat.) ±0.15(syst.) at the scale μ2≈13 (GeV/c)2 and x≈0.20.",

author = "C. Adolph and Alekseev, {M. G.} and Alexakhin, {V. Yu} and Yu Alexandrov and Alexeev, {G. D.} and A. Amoroso and Antonov, {A. A.} and A. Austregesilo and B. Bade{\l}ek and F. Balestra and J. Barth and G. Baum and Y. Bedfer and A. Berlin and J. Bernhard and R. Bertini and M. Bettinelli and K. Bicker and J. Bieling and R. Birsa and J. Bisplinghoff and P. Bordalo and F. Bradamante and C. Braun and A. Bravar and A. Bressan and M. B{\"u}chele and E. Burtin and L. Capozza and M. Chiosso and Chung, {S. U.} and A. Cicuttin and Crespo, {M. L.} and {Dalla Torre}, S. and S. Das and Dasgupta, {S. S.} and S. Dasgupta and Denisov, {O. Yu} and L. Dhara and Donskov, {S. V.} and N. Doshita and V. Duic and W. D{\"u}nnweber and M. Dziewiecki and A. Efremov and C. Elia and Eversheim, {P. D.} and W. Eyrich and M. Faessler and A. Ferrero and A. Filin and M. Finger and M. Finger and H. Fischer and C. Franco and {Du Fresne Von Hohenesche}, N. and Friedrich, {J. M.} and V. Frolov and R. Garfagnini and F. Gautheron and Gavrichtchouk, {O. P.} and S. Gerassimov and R. Geyer and M. Giorgi and I. Gnesi and B. Gobbo and S. Goertz and S. Grabm{\"u}ller and A. Grasso and B. Grube and R. Gushterski and A. Guskov and T. Guth{\"o}rl and F. Haas and {Von Harrach}, D. and Heinsius, {F. H.} and F. Herrmann and C. He{\ss} and F. Hinterberger and N. Horikawa and Ch H{\"o}ppner and N. D'Hose and S. Huber and S. Ishimoto and O. Ivanov and Yu Ivanshin and T. Iwata and R. Jahn and V. Jary and P. Jasinski and R. Joosten and E. Kabu{\ss} and D. Kang and B. Ketzer and Khaustov, {G. V.} and Khokhlov, {Yu A.} and Yu Kisselev and F. Klein and K. Klimaszewski and S. Koblitz and Koivuniemi, {J. H.} and Kolosov, {V. N.} and K. Kondo and K. K{\"o}nigsmann and I. Konorov and Konstantinov, {V. F.} and A. Korzenev and Kotzinian, {A. M.} and O. Kouznetsov and M. Kr{\"a}mer and Kroumchtein, {Z. V.} and F. Kunne and K. Kurek and L. Lauser and Lednev, {A. A.} and A. Lehmann and S. Levorato and J. Lichtenstadt and T. Liska and A. Maggiora and A. Magnon and N. Makke and Mallot, {G. K.} and A. Mann and C. Marchand and A. Martin and J. Marzec and T. Matsuda and G. Meshcheryakov and W. Meyer and T. Michigami and Mikhailov, {Yu V.} and A. Morreale and A. Mutter and A. Nagaytsev and T. Nagel and F. Nerling and S. Neubert and D. Neyret and Nikolaenko, {V. I.} and Nowak, {W. D.} and Nunes, {A. S.} and Olshevsky, {A. G.} and M. Ostrick and A. Padee and R. Panknin and D. Panzieri and B. Parsamyan and S. Paul and E. Perevalova and G. Pesaro and Peshekhonov, {D. V.} and G. Piragino and S. Platchkov and J. Pochodzalla and J. Polak and Polyakov, {V. A.} and J. Pretz and M. Quaresma and C. Quintans and Rajotte, {J. F.} and S. Ramos and V. Rapatsky and G. Reicherz and E. Rocco and E. Rondio and Rossiyskaya, {N. S.} and Ryabchikov, {D. I.} and Samoylenko, {V. D.} and A. Sandacz and Sapozhnikov, {M. G.} and S. Sarkar and Savin, {I. A.} and G. Sbrizzai and P. Schiavon and C. Schill and T. Schl{\"u}ter and A. Schmidt and K. Schmidt and L. Schmitt and H. Schm{\"i}den and K. Sch{\"o}nning and S. Schopferer and M. Schott and Shevchenko, {O. Yu} and L. Silva and L. Sinha and Sissakian, {A. N.} and M. Slunecka and Smirnov, {G. I.} and S. Sosio and F. Sozzi and A. Srnka and L. Steiger and M. Stolarski and M. Sulc and R. Sulej and H. Suzuki and P. Sznajder and S. Takekawa and {Ter Wolbeek}, J. and S. Tessaro and F. Tessarotto and Tkatchev, {L. G.} and S. Uhl and I. Uman and M. Vandenbroucke and M. Virius and Vlassov, {N. V.} and L. Wang and T. Weisrock and M. Wilfert and R. Windmolders and W. Wi{\'s}licki and H. Wollny and K. Zaremba and M. Zavertyaev and E. Zemlyanichkina and M. Ziembicki and N. Zhuravlev and A. Zvyagin",

year = "2013",

month = mar,

day = "25",

doi = "10.1103/PhysRevD.87.052018",

language = "אנגלית",

volume = "87",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

publisher = "American Physical Society",

number = "5",

}

Adolph, C, Alekseev, MG, Alexakhin, VY, Alexandrov, Y, Alexeev, GD, Amoroso, A, Antonov, AA, Austregesilo, A, Badełek, B, Balestra, F, Barth, J, Baum, G, Bedfer, Y, Berlin, A, Bernhard, J, Bertini, R, Bettinelli, M, Bicker, K, Bieling, J, Birsa, R, Bisplinghoff, J, Bordalo, P, Bradamante, F, Braun, C, Bravar, A, Bressan, A, Büchele, M, Burtin, E, Capozza, L, Chiosso, M, Chung, SU, Cicuttin, A, Crespo, ML, Dalla Torre, S, Das, S, Dasgupta, SS, Dasgupta, S, Denisov, OY, Dhara, L, Donskov, SV, Doshita, N, Duic, V, Dünnweber, W, Dziewiecki, M, Efremov, A, Elia, C, Eversheim, PD, Eyrich, W, Faessler, M, Ferrero, A, Filin, A, Finger, M, Finger, M, Fischer, H, Franco, C, Du Fresne Von Hohenesche, N, Friedrich, JM, Frolov, V, Garfagnini, R, Gautheron, F, Gavrichtchouk, OP, Gerassimov, S, Geyer, R, Giorgi, M, Gnesi, I, Gobbo, B, Goertz, S, Grabmüller, S, Grasso, A, Grube, B, Gushterski, R, Guskov, A, Guthörl, T, Haas, F, Von Harrach, D, Heinsius, FH, Herrmann, F, Heß, C, Hinterberger, F, Horikawa, N, Höppner, C, D'Hose, N, Huber, S, Ishimoto, S, Ivanov, O, Ivanshin, Y, Iwata, T, Jahn, R, Jary, V, Jasinski, P, Joosten, R, Kabuß, E, Kang, D, Ketzer, B, Khaustov, GV, Khokhlov, YA, Kisselev, Y, Klein, F, Klimaszewski, K, Koblitz, S, Koivuniemi, JH, Kolosov, VN, Kondo, K, Königsmann, K, Konorov, I, Konstantinov, VF, Korzenev, A, Kotzinian, AM, Kouznetsov, O, Krämer, M, Kroumchtein, ZV, Kunne, F, Kurek, K, Lauser, L, Lednev, AA, Lehmann, A, Levorato, S, Lichtenstadt, J, Liska, T, Maggiora, A, Magnon, A, Makke, N, Mallot, GK, Mann, A, Marchand, C, Martin, A, Marzec, J, Matsuda, T, Meshcheryakov, G, Meyer, W, Michigami, T, Mikhailov, YV, Morreale, A, Mutter, A, Nagaytsev, A, Nagel, T, Nerling, F, Neubert, S, Neyret, D, Nikolaenko, VI, Nowak, WD, Nunes, AS, Olshevsky, AG, Ostrick, M, Padee, A, Panknin, R, Panzieri, D, Parsamyan, B, Paul, S, Perevalova, E, Pesaro, G, Peshekhonov, DV, Piragino, G, Platchkov, S, Pochodzalla, J, Polak, J, Polyakov, VA, Pretz, J, Quaresma, M, Quintans, C, Rajotte, JF, Ramos, S, Rapatsky, V, Reicherz, G, Rocco, E, Rondio, E, Rossiyskaya, NS, Ryabchikov, DI, Samoylenko, VD, Sandacz, A, Sapozhnikov, MG, Sarkar, S, Savin, IA, Sbrizzai, G, Schiavon, P, Schill, C, Schlüter, T, Schmidt, A, Schmidt, K, Schmitt, L, Schmïden, H, Schönning, K, Schopferer, S, Schott, M, Shevchenko, OY, Silva, L, Sinha, L, Sissakian, AN, Slunecka, M, Smirnov, GI, Sosio, S, Sozzi, F, Srnka, A, Steiger, L, Stolarski, M, Sulc, M, Sulej, R, Suzuki, H, Sznajder, P, Takekawa, S, Ter Wolbeek, J, Tessaro, S, Tessarotto, F, Tkatchev, LG, Uhl, S, Uman, I, Vandenbroucke, M, Virius, M, Vlassov, NV, Wang, L, Weisrock, T, Wilfert, M, Windmolders, R, Wiślicki, W, Wollny, H, Zaremba, K, Zavertyaev, M, Zemlyanichkina, E, Ziembicki, M, Zhuravlev, N & Zvyagin, A 2013, 'Leading and next-to-leading order gluon polarization in the nucleon and longitudinal double spin asymmetries from open charm muoproduction', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 87, no. 5, 052018. https://doi.org/10.1103/PhysRevD.87.052018

TY - JOUR

T1 - Leading and next-to-leading order gluon polarization in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

AU - Adolph, C.

AU - Alekseev, M. G.

AU - Alexakhin, V. Yu

AU - Alexandrov, Yu

AU - Alexeev, G. D.

AU - Amoroso, A.

AU - Antonov, A. A.

AU - Austregesilo, A.

AU - Badełek, B.

AU - Balestra, F.

AU - Barth, J.

AU - Baum, G.

AU - Bedfer, Y.

AU - Berlin, A.

AU - Bernhard, J.

AU - Bertini, R.

AU - Bettinelli, M.

AU - Bicker, K.

AU - Bieling, J.

AU - Birsa, R.

AU - Bisplinghoff, J.

AU - Bordalo, P.

AU - Bradamante, F.

AU - Braun, C.

AU - Bravar, A.

AU - Bressan, A.

AU - Büchele, M.

AU - Burtin, E.

AU - Capozza, L.

AU - Chiosso, M.

AU - Chung, S. U.

AU - Cicuttin, A.

AU - Crespo, M. L.

AU - Dalla Torre, S.

AU - Das, S.

AU - Dasgupta, S. S.

AU - Dasgupta, S.

AU - Denisov, O. Yu

AU - Dhara, L.

AU - Donskov, S. V.

AU - Doshita, N.

AU - Duic, V.

AU - Dünnweber, W.

AU - Dziewiecki, M.

AU - Efremov, A.

AU - Elia, C.

AU - Eversheim, P. D.

AU - Eyrich, W.

AU - Faessler, M.

AU - Ferrero, A.

AU - Filin, A.

AU - Finger, M.

AU - Fischer, H.

AU - Franco, C.

AU - Du Fresne Von Hohenesche, N.

AU - Friedrich, J. M.

AU - Frolov, V.

AU - Garfagnini, R.

AU - Gautheron, F.

AU - Gavrichtchouk, O. P.

AU - Gerassimov, S.

AU - Geyer, R.

AU - Giorgi, M.

AU - Gnesi, I.

AU - Gobbo, B.

AU - Goertz, S.

AU - Grabmüller, S.

AU - Grasso, A.

AU - Grube, B.

AU - Gushterski, R.

AU - Guskov, A.

AU - Guthörl, T.

AU - Haas, F.

AU - Von Harrach, D.

AU - Heinsius, F. H.

AU - Herrmann, F.

AU - Heß, C.

AU - Hinterberger, F.

AU - Horikawa, N.

AU - Höppner, Ch

AU - D'Hose, N.

AU - Huber, S.

AU - Ishimoto, S.

AU - Ivanov, O.

AU - Ivanshin, Yu

AU - Iwata, T.

AU - Jahn, R.

AU - Jary, V.

AU - Jasinski, P.

AU - Joosten, R.

AU - Kabuß, E.

AU - Kang, D.

AU - Ketzer, B.

AU - Khaustov, G. V.

AU - Khokhlov, Yu A.

AU - Kisselev, Yu

AU - Klein, F.

AU - Klimaszewski, K.

AU - Koblitz, S.

AU - Koivuniemi, J. H.

AU - Kolosov, V. N.

AU - Kondo, K.

AU - Königsmann, K.

AU - Konorov, I.

AU - Konstantinov, V. F.

AU - Korzenev, A.

AU - Kotzinian, A. M.

AU - Kouznetsov, O.

AU - Krämer, M.

AU - Kroumchtein, Z. V.

AU - Kunne, F.

AU - Kurek, K.

AU - Lauser, L.

AU - Lednev, A. A.

AU - Lehmann, A.

AU - Levorato, S.

AU - Lichtenstadt, J.

AU - Liska, T.

AU - Maggiora, A.

AU - Magnon, A.

AU - Makke, N.

AU - Mallot, G. K.

AU - Mann, A.

AU - Marchand, C.

AU - Martin, A.

AU - Marzec, J.

AU - Matsuda, T.

AU - Meshcheryakov, G.

AU - Meyer, W.

AU - Michigami, T.

AU - Mikhailov, Yu V.

AU - Morreale, A.

AU - Mutter, A.

AU - Nagaytsev, A.

AU - Nagel, T.

AU - Nerling, F.

AU - Neubert, S.

AU - Neyret, D.

AU - Nikolaenko, V. I.

AU - Nowak, W. D.

AU - Nunes, A. S.

AU - Olshevsky, A. G.

AU - Ostrick, M.

AU - Padee, A.

AU - Panknin, R.

AU - Panzieri, D.

AU - Parsamyan, B.

AU - Paul, S.

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AU - Zvyagin, A.

PY - 2013/3/25

Y1 - 2013/3/25

N2 - The gluon polarization in the nucleon was measured using open charm production by scattering 160 GeV/c polarized muons off longitudinally polarized protons or deuterons. The data were taken by the COMPASS Collaboration between 2002 and 2007. A detailed account is given of the analysis method that includes the application of neural networks. Several decay channels of D0 mesons are investigated. Longitudinal spin asymmetries of the D meson production cross sections are extracted in bins of D0 transverse momentum and energy. At leading order QCD accuracy, the average gluon polarization is determined as Δg/gLO=-0.06±0.21(stat.)±0.08(syst.) at the scale μ2≈13 (GeV/c)2 and an average gluon momentum fraction x≈0.11. The average gluon polarization is also obtained at next-to-leading order QCD accuracy as Δg/g NLO=-0.13±0.15(stat.) ±0.15(syst.) at the scale μ2≈13 (GeV/c)2 and x≈0.20.

AB - The gluon polarization in the nucleon was measured using open charm production by scattering 160 GeV/c polarized muons off longitudinally polarized protons or deuterons. The data were taken by the COMPASS Collaboration between 2002 and 2007. A detailed account is given of the analysis method that includes the application of neural networks. Several decay channels of D0 mesons are investigated. Longitudinal spin asymmetries of the D meson production cross sections are extracted in bins of D0 transverse momentum and energy. At leading order QCD accuracy, the average gluon polarization is determined as Δg/gLO=-0.06±0.21(stat.)±0.08(syst.) at the scale μ2≈13 (GeV/c)2 and an average gluon momentum fraction x≈0.11. The average gluon polarization is also obtained at next-to-leading order QCD accuracy as Δg/g NLO=-0.13±0.15(stat.) ±0.15(syst.) at the scale μ2≈13 (GeV/c)2 and x≈0.20.

UR - http://www.scopus.com/inward/record.url?scp=84875702951&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.87.052018

DO - 10.1103/PhysRevD.87.052018

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AN - SCOPUS:84875702951

SN - 1550-7998

VL - 87

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 5

M1 - 052018

ER -

Leading and next-to-leading order gluon polarization in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

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