Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

M. Alekseev; V. Yu Alexakhin; Yu Alexandrov; G. D. Alexeev; A. Amoroso; A. Austregisilio; B. Badełek; F. Balestra; J. Ball; J. Barth; G. Baum; Y. Bedfer; J. Bernhard; R. Bertini; M. Bettinelli; R. Birsa; J. Bisplinghoff; P. Bordalo; F. Bradamante; A. Bravar; A. Bressan; G. Brona; E. Burtin; M. P. Bussa; A. Chapiro; M. Chiosso; S. U. Chung; A. Cicuttin; M. Colantoni; M. L. Crespo; S. Dalla Torre; T. Dafni; S. Das; S. S. Dasgupta; O. Yu Denisov; L. Dhara; V. Diaz; A. M. Dinkelbach; S. V. Donskov; N. Doshita; V. Duic; W. Dünnweber; A. Efremov; A. El Alaoui; P. D. Eversheim; W. Eyrich; M. Faessler; A. Ferrero; M. Finger; M. Finger; H. Fischer; C. Franco; J. M. Friedrich; R. Garfagnini; F. Gautheron; O. P. Gavrichtchouk; R. Gazda; S. Gerassimov; R. Geyer; M. Giorgi; B. Gobbo; S. Goertz; S. Grabmüller; O. A. Grajek; A. Grasso; B. Grube; R. Gushterski; A. Guskov; F. Haas; R. Hagemann; D. von Harrach; T. Hasegawa; J. Heckmann; F. H. Heinsius; R. Hermann; F. Herrmann; C. Heß; F. Hinterberger; M. von Hodenberg; N. Horikawa; Ch Höppner; N. d'Hose; C. Ilgner; S. Ishimoto; O. Ivanov; Yu Ivanshin; T. Iwata; R. Jahn; P. Jasinski; G. Jegou; R. Joosten; E. Kabuß; W. Käfer; D. Kang; B. Ketzer; G. V. Khaustov; Yu A. Khokhlov; J. Kiefer; Yu Kisselev; F. Klein; K. Klimaszewski; S. Koblitz; J. H. Koivuniemi; V. N. Kolosov; E. V. Komissarov; K. Kondo; K. Königsmann; I. Konorov; V. F. Konstantinov; A. Korzenev; A. M. Kotzinian; O. Kouznetsov; K. Kowalik; M. Krämer; A. Kral; Z. V. Kroumchtein; R. Kuhn; F. Kunne; K. Kurek; J. M. Le Goff; A. A. Lednev; A. Lehmann; S. Levorato; J. Lichtenstadt; T. Liska; A. Maggiora; M. Maggiora; A. Magnon; G. K. Mallot; A. Mann; C. Marchand; J. Marroncle; A. Martin; J. Marzec; F. Massmann; T. Matsuda; A. N. Maximov; W. Meyer; T. Michigami; Yu V. Mikhailov; M. A. Moinester; A. Mutter; A. Nagaytsev; T. Nagel; J. Nassalski; S. Negrini; F. Nerling; S. Neubert; D. Neyret; V. I. Nikolaenko; A. G. Olshevsky; M. Ostrick; A. Padee; R. Panknin; S. Panebianco; D. Panzieri; B. Parsamyan; S. Paul; B. Pawlukiewicz-Kaminska; E. Perevalova; G. Pesaro; D. V. Peshekhonov; G. Piragino; S. Platchkov; J. Pochodzalla; J. Polak; V. A. Polyakov; G. Pontecorvo; J. Pretz; C. Quintans; J. F. Rajotte; S. Ramos; V. Rapatsky; G. Reicherz; D. Reggiani; A. Richter; F. Robinet; E. Rocco; E. Rondio; D. I. Ryabchikov; V. D. Samoylenko; A. Sandacz; H. Santos; M. G. Sapozhnikov; S. Sarkar; I. A. Savin; G. Sbrizza; P. Schiavon; C. Schill; L. Schmitt; W. Schröder; O. Yu Shevchenko; H. W. Siebert; L. Silva; L. Sinha; A. N. Sissakian; M. Slunecka; G. I. Smirnov; S. Sosio; F. Sozzi; A. Srnka; M. Stolarski; M. Sulc; R. Sulej; S. Takekawa; S. Tessaro; F. Tessarotto; A. Teufel; L. G. Tkatchev; G. Venugopal; M. Virius; N. V. Vlassov; A. Vossen; Q. Weitzel; K. Wenzl; R. Windmolders; W. Wiślicki; H. Wollny; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; M. Ziembicki; J. Zhao; N. Zhuravlev; A. Zvyagin

doi:10.1016/j.physletb.2009.04.059

Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

M. Alekseev, V. Yu Alexakhin, Yu Alexandrov, G. D. Alexeev, A. Amoroso, A. Austregisilio, B. Badełek, F. Balestra, J. Ball, J. Barth, G. Baum, Y. Bedfer, J. Bernhard, R. Bertini, M. Bettinelli, R. Birsa, J. Bisplinghoff, P. Bordalo, F. Bradamante, A. BravarA. Bressan, G. Brona, E. Burtin, M. P. Bussa, A. Chapiro, M. Chiosso, S. U. Chung, A. Cicuttin, M. Colantoni, M. L. Crespo, S. Dalla Torre, T. Dafni, S. Das, S. S. Dasgupta, O. Yu Denisov, L. Dhara, V. Diaz, A. M. Dinkelbach, S. V. Donskov, N. Doshita, V. Duic, W. Dünnweber, A. Efremov, A. El Alaoui, P. D. Eversheim, W. Eyrich, M. Faessler, A. Ferrero, M. Finger, M. Finger, H. Fischer, C. Franco, J. M. Friedrich, R. Garfagnini, F. Gautheron, O. P. Gavrichtchouk, R. Gazda, S. Gerassimov, R. Geyer, M. Giorgi, B. Gobbo, S. Goertz, S. Grabmüller, O. A. Grajek, A. Grasso, B. Grube, R. Gushterski, A. Guskov, F. Haas, R. Hagemann, D. von Harrach, T. Hasegawa, J. Heckmann, F. H. Heinsius, R. Hermann, F. Herrmann, C. Heß, F. Hinterberger, M. von Hodenberg, N. Horikawa, Ch Höppner, N. d'Hose, C. Ilgner, S. Ishimoto, O. Ivanov, Yu Ivanshin, T. Iwata, R. Jahn, P. Jasinski, G. Jegou, R. Joosten, E. Kabuß, W. Käfer, D. Kang, B. Ketzer, G. V. Khaustov, Yu A. Khokhlov, J. Kiefer, Yu Kisselev, F. Klein, K. Klimaszewski, S. Koblitz, J. H. Koivuniemi, V. N. Kolosov, E. V. Komissarov, K. Kondo, K. Königsmann, I. Konorov, V. F. Konstantinov, A. Korzenev, A. M. Kotzinian, O. Kouznetsov, K. Kowalik, M. Krämer, A. Kral, Z. V. Kroumchtein, R. Kuhn, F. Kunne, K. Kurek, J. M. Le Goff, A. A. Lednev, A. Lehmann, S. Levorato, J. Lichtenstadt, T. Liska, A. Maggiora, M. Maggiora, A. Magnon, G. K. Mallot, A. Mann, C. Marchand, J. Marroncle, A. Martin, J. Marzec, F. Massmann, T. Matsuda, A. N. Maximov, W. Meyer, T. Michigami, Yu V. Mikhailov, M. A. Moinester, A. Mutter, A. Nagaytsev, T. Nagel, J. Nassalski, S. Negrini, F. Nerling, S. Neubert, D. Neyret, V. I. Nikolaenko, A. G. Olshevsky, M. Ostrick, A. Padee, R. Panknin, S. Panebianco, D. Panzieri, B. Parsamyan, S. Paul, B. Pawlukiewicz-Kaminska, E. Perevalova, G. Pesaro, D. V. Peshekhonov, G. Piragino, S. Platchkov, J. Pochodzalla, J. Polak, V. A. Polyakov, G. Pontecorvo, J. Pretz, C. Quintans, J. F. Rajotte, S. Ramos, V. Rapatsky, G. Reicherz, D. Reggiani, A. Richter, F. Robinet, E. Rocco, E. Rondio, D. I. Ryabchikov, V. D. Samoylenko, A. Sandacz, H. Santos, M. G. Sapozhnikov, S. Sarkar, I. A. Savin, G. Sbrizza, P. Schiavon, C. Schill, L. Schmitt, W. Schröder, O. Yu Shevchenko, H. W. Siebert, L. Silva, L. Sinha, A. N. Sissakian, M. Slunecka, G. I. Smirnov, S. Sosio, F. Sozzi, A. Srnka, M. Stolarski, M. Sulc, R. Sulej, S. Takekawa, S. Tessaro, F. Tessarotto, A. Teufel, L. G. Tkatchev, G. Venugopal, M. Virius, N. V. Vlassov, A. Vossen, Q. Weitzel, K. Wenzl, R. Windmolders, W. Wiślicki, H. Wollny, K. Zaremba, M. Zavertyaev, E. Zemlyanichkina, M. Ziembicki, J. Zhao, N. Zhuravlev, A. Zvyagin

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

50 Scopus citations

Abstract

The gluon polarisation in the nucleon has been determined by detecting charm production via D ⁰ meson decay to charged K and π in polarised muon scattering off a longitudinally polarised deuteron target. The data were taken by the COMPASS Collaboration at CERN between 2002 and 2006 and correspond to an integrated luminosity of 2.8 fb ^-1. The dominant underlying process of charm production is the photon-gluon fusion to a c over(c, ̄) pair. A leading order QCD approach gives an average gluon polarisation of 〈 Δ g / g 〉 _x = - 0.49 ± 0.27 (stat) ± 0.11 (syst) at a scale μ ² ≈ 13 (GeV / c) ² and at an average gluon momentum fraction 〈 x 〉 ≈ 0.11. The longitudinal cross-section asymmetry for D ⁰ production is presented in bins of the transverse momentum and the energy of the D ⁰ meson.

Original language	English
Pages (from-to)	31-38
Number of pages	8
Journal	Physics Letters B
Volume	676
Issue number	1-3
DOIs	https://doi.org/10.1016/j.physletb.2009.04.059
State	Published - Jun 1 2009
Externally published	Yes

Keywords

Asymmetry
Gluon polarisation
Inelastic muon scattering
Spin

Access to Document

10.1016/j.physletb.2009.04.059

Cite this

Alekseev, M., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Austregisilio, A., Badełek, B., Balestra, F., Ball, J., Barth, J., Baum, G., Bedfer, Y., Bernhard, J., Bertini, R., Bettinelli, M., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., ... Zvyagin, A. (2009). Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction. Physics Letters B, 676(1-3), 31-38. https://doi.org/10.1016/j.physletb.2009.04.059

@article{39f6e62887f14077b2c08eb596167ddf,

title = "Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction",

abstract = "The gluon polarisation in the nucleon has been determined by detecting charm production via D 0 meson decay to charged K and π in polarised muon scattering off a longitudinally polarised deuteron target. The data were taken by the COMPASS Collaboration at CERN between 2002 and 2006 and correspond to an integrated luminosity of 2.8 fb -1. The dominant underlying process of charm production is the photon-gluon fusion to a c over(c,{\= }) pair. A leading order QCD approach gives an average gluon polarisation of 〈 Δ g / g 〉 x = - 0.49 ± 0.27 (stat) ± 0.11 (syst) at a scale μ 2 ≈ 13 (GeV / c) 2 and at an average gluon momentum fraction 〈 x 〉 ≈ 0.11. The longitudinal cross-section asymmetry for D 0 production is presented in bins of the transverse momentum and the energy of the D 0 meson.",

keywords = "Asymmetry, Gluon polarisation, Inelastic muon scattering, Spin",

author = "M. Alekseev and Alexakhin, {V. Yu} and Yu Alexandrov and Alexeev, {G. D.} and A. Amoroso and A. Austregisilio and B. Bade{\l}ek and F. Balestra and J. Ball and J. Barth and G. Baum and Y. Bedfer and J. Bernhard and R. Bertini and M. Bettinelli and R. Birsa and J. Bisplinghoff and P. Bordalo and F. Bradamante and A. Bravar and A. Bressan and G. Brona and E. Burtin and Bussa, {M. P.} and A. Chapiro and M. Chiosso and Chung, {S. U.} and A. Cicuttin and M. Colantoni and Crespo, {M. L.} and Torre, {S. Dalla} and T. Dafni and S. Das and Dasgupta, {S. S.} and Denisov, {O. Yu} and L. Dhara and V. Diaz and Dinkelbach, {A. M.} and Donskov, {S. V.} and N. Doshita and V. Duic and W. D{\"u}nnweber and A. Efremov and {El Alaoui}, A. and Eversheim, {P. D.} and W. Eyrich and M. Faessler and A. Ferrero and M. Finger and M. Finger and H. Fischer and C. Franco and Friedrich, {J. M.} and R. Garfagnini and F. Gautheron and Gavrichtchouk, {O. P.} and R. Gazda and S. Gerassimov and R. Geyer and M. Giorgi and B. Gobbo and S. Goertz and S. Grabm{\"u}ller and Grajek, {O. A.} and A. Grasso and B. Grube and R. Gushterski and A. Guskov and F. Haas and R. Hagemann and {von Harrach}, D. and T. Hasegawa and J. Heckmann and Heinsius, {F. H.} and R. Hermann and F. Herrmann and C. He{\ss} and F. Hinterberger and {von Hodenberg}, M. and N. Horikawa and Ch H{\"o}ppner and N. d'Hose and C. Ilgner and S. Ishimoto and O. Ivanov and Yu Ivanshin and T. Iwata and R. Jahn and P. Jasinski and G. Jegou and R. Joosten and E. Kabu{\ss} and W. K{\"a}fer and D. Kang and B. Ketzer and Khaustov, {G. V.} and Khokhlov, {Yu A.} and J. Kiefer and Yu Kisselev and F. Klein and K. Klimaszewski and S. Koblitz and Koivuniemi, {J. H.} and Kolosov, {V. N.} and Komissarov, {E. V.} 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 K. Kowalik and M. Kr{\"a}mer and A. Kral and Kroumchtein, {Z. V.} and R. Kuhn and F. Kunne and K. Kurek and {Le Goff}, {J. M.} and Lednev, {A. A.} and A. Lehmann and S. Levorato and J. Lichtenstadt and T. Liska and A. Maggiora and M. Maggiora and A. Magnon and Mallot, {G. K.} and A. Mann and C. Marchand and J. Marroncle and A. Martin and J. Marzec and F. Massmann and T. Matsuda and Maximov, {A. N.} and W. Meyer and T. Michigami and Mikhailov, {Yu V.} and Moinester, {M. A.} and A. Mutter and A. Nagaytsev and T. Nagel and J. Nassalski and S. Negrini and F. Nerling and S. Neubert and D. Neyret and Nikolaenko, {V. I.} and Olshevsky, {A. G.} and M. Ostrick and A. Padee and R. Panknin and S. Panebianco and D. Panzieri and B. Parsamyan and S. Paul and B. Pawlukiewicz-Kaminska 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 G. Pontecorvo and J. Pretz and C. Quintans and Rajotte, {J. F.} and S. Ramos and V. Rapatsky and G. Reicherz and D. Reggiani and A. Richter and F. Robinet and E. Rocco and E. Rondio and Ryabchikov, {D. I.} and Samoylenko, {V. D.} and A. Sandacz and H. Santos and Sapozhnikov, {M. G.} and S. Sarkar and Savin, {I. A.} and G. Sbrizza and P. Schiavon and C. Schill and L. Schmitt and W. Schr{\"o}der and Shevchenko, {O. Yu} and Siebert, {H. W.} 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 M. Stolarski and M. Sulc and R. Sulej and S. Takekawa and S. Tessaro and F. Tessarotto and A. Teufel and Tkatchev, {L. G.} and G. Venugopal and M. Virius and Vlassov, {N. V.} and A. Vossen and Q. Weitzel and K. Wenzl and R. Windmolders and W. Wi{\'s}licki and H. Wollny and K. Zaremba and M. Zavertyaev and E. Zemlyanichkina and M. Ziembicki and J. Zhao and N. Zhuravlev and A. Zvyagin",

year = "2009",

month = jun,

day = "1",

doi = "10.1016/j.physletb.2009.04.059",

language = "English",

volume = "676",

pages = "31--38",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-3",

}

Alekseev, M, Alexakhin, VY, Alexandrov, Y, Alexeev, GD, Amoroso, A, Austregisilio, A, Badełek, B, Balestra, F, Ball, J, Barth, J, Baum, G, Bedfer, Y, Bernhard, J, Bertini, R, Bettinelli, M, Birsa, R, Bisplinghoff, J, Bordalo, P, Bradamante, F, Bravar, A, Bressan, A, Brona, G, Burtin, E, Bussa, MP, Chapiro, A, Chiosso, M, Chung, SU, Cicuttin, A, Colantoni, M, Crespo, ML, Torre, SD, Dafni, T, Das, S, Dasgupta, SS, Denisov, OY, Dhara, L, Diaz, V, Dinkelbach, AM, Donskov, SV, Doshita, N, Duic, V, Dünnweber, W, Efremov, A, El Alaoui, A, Eversheim, PD, Eyrich, W, Faessler, M, Ferrero, A, Finger, M, Finger, M, Fischer, H, Franco, C, Friedrich, JM, Garfagnini, R, Gautheron, F, Gavrichtchouk, OP, Gazda, R, Gerassimov, S, Geyer, R, Giorgi, M, Gobbo, B, Goertz, S, Grabmüller, S, Grajek, OA, Grasso, A, Grube, B, Gushterski, R, Guskov, A, Haas, F, Hagemann, R, von Harrach, D, Hasegawa, T, Heckmann, J, Heinsius, FH, Hermann, R, Herrmann, F, Heß, C, Hinterberger, F, von Hodenberg, M, Horikawa, N, Höppner, C, d'Hose, N, Ilgner, C, Ishimoto, S, Ivanov, O, Ivanshin, Y, Iwata, T, Jahn, R, Jasinski, P, Jegou, G, Joosten, R, Kabuß, E, Käfer, W, Kang, D, Ketzer, B, Khaustov, GV, Khokhlov, YA, Kiefer, J, Kisselev, Y, Klein, F, Klimaszewski, K, Koblitz, S, Koivuniemi, JH, Kolosov, VN, Komissarov, EV, Kondo, K, Königsmann, K, Konorov, I, Konstantinov, VF, Korzenev, A, Kotzinian, AM, Kouznetsov, O, Kowalik, K, Krämer, M, Kral, A, Kroumchtein, ZV, Kuhn, R, Kunne, F, Kurek, K, Le Goff, JM, Lednev, AA, Lehmann, A, Levorato, S, Lichtenstadt, J, Liska, T, Maggiora, A, Maggiora, M, Magnon, A, Mallot, GK, Mann, A, Marchand, C, Marroncle, J, Martin, A, Marzec, J, Massmann, F, Matsuda, T, Maximov, AN, Meyer, W, Michigami, T, Mikhailov, YV, Moinester, MA, Mutter, A, Nagaytsev, A, Nagel, T, Nassalski, J, Negrini, S, Nerling, F, Neubert, S, Neyret, D, Nikolaenko, VI, Olshevsky, AG, Ostrick, M, Padee, A, Panknin, R, Panebianco, S, Panzieri, D, Parsamyan, B, Paul, S, Pawlukiewicz-Kaminska, B, Perevalova, E, Pesaro, G, Peshekhonov, DV, Piragino, G, Platchkov, S, Pochodzalla, J, Polak, J, Polyakov, VA, Pontecorvo, G, Pretz, J, Quintans, C, Rajotte, JF, Ramos, S, Rapatsky, V, Reicherz, G, Reggiani, D, Richter, A, Robinet, F, Rocco, E, Rondio, E, Ryabchikov, DI, Samoylenko, VD, Sandacz, A, Santos, H, Sapozhnikov, MG, Sarkar, S, Savin, IA, Sbrizza, G, Schiavon, P, Schill, C, Schmitt, L, Schröder, W, Shevchenko, OY, Siebert, HW, Silva, L, Sinha, L, Sissakian, AN, Slunecka, M, Smirnov, GI, Sosio, S, Sozzi, F, Srnka, A, Stolarski, M, Sulc, M, Sulej, R, Takekawa, S, Tessaro, S, Tessarotto, F, Teufel, A, Tkatchev, LG, Venugopal, G, Virius, M, Vlassov, NV, Vossen, A, Weitzel, Q, Wenzl, K, Windmolders, R, Wiślicki, W, Wollny, H, Zaremba, K, Zavertyaev, M, Zemlyanichkina, E, Ziembicki, M, Zhao, J, Zhuravlev, N & Zvyagin, A 2009, 'Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction', Physics Letters B, vol. 676, no. 1-3, pp. 31-38. https://doi.org/10.1016/j.physletb.2009.04.059

TY - JOUR

T1 - Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

AU - Alekseev, M.

AU - Alexakhin, V. Yu

AU - Alexandrov, Yu

AU - Alexeev, G. D.

AU - Amoroso, A.

AU - Austregisilio, A.

AU - Badełek, B.

AU - Balestra, F.

AU - Ball, J.

AU - Barth, J.

AU - Baum, G.

AU - Bedfer, Y.

AU - Bernhard, J.

AU - Bertini, R.

AU - Bettinelli, M.

AU - Birsa, R.

AU - Bisplinghoff, J.

AU - Bordalo, P.

AU - Bradamante, F.

AU - Bravar, A.

AU - Bressan, A.

AU - Brona, G.

AU - Burtin, E.

AU - Bussa, M. P.

AU - Chapiro, A.

AU - Chiosso, M.

AU - Chung, S. U.

AU - Cicuttin, A.

AU - Colantoni, M.

AU - Crespo, M. L.

AU - Torre, S. Dalla

AU - Dafni, T.

AU - Das, S.

AU - Dasgupta, S. S.

AU - Denisov, O. Yu

AU - Dhara, L.

AU - Diaz, V.

AU - Dinkelbach, A. M.

AU - Donskov, S. V.

AU - Doshita, N.

AU - Duic, V.

AU - Dünnweber, W.

AU - Efremov, A.

AU - El Alaoui, A.

AU - Eversheim, P. D.

AU - Eyrich, W.

AU - Faessler, M.

AU - Ferrero, A.

AU - Finger, M.

AU - Fischer, H.

AU - Franco, C.

AU - Friedrich, J. M.

AU - Garfagnini, R.

AU - Gautheron, F.

AU - Gavrichtchouk, O. P.

AU - Gazda, R.

AU - Gerassimov, S.

AU - Geyer, R.

AU - Giorgi, M.

AU - Gobbo, B.

AU - Goertz, S.

AU - Grabmüller, S.

AU - Grajek, O. A.

AU - Grasso, A.

AU - Grube, B.

AU - Gushterski, R.

AU - Guskov, A.

AU - Haas, F.

AU - Hagemann, R.

AU - von Harrach, D.

AU - Hasegawa, T.

AU - Heckmann, J.

AU - Heinsius, F. H.

AU - Hermann, R.

AU - Herrmann, F.

AU - Heß, C.

AU - Hinterberger, F.

AU - von Hodenberg, M.

AU - Horikawa, N.

AU - Höppner, Ch

AU - d'Hose, N.

AU - Ilgner, C.

AU - Ishimoto, S.

AU - Ivanov, O.

AU - Ivanshin, Yu

AU - Iwata, T.

AU - Jahn, R.

AU - Jasinski, P.

AU - Jegou, G.

AU - Joosten, R.

AU - Kabuß, E.

AU - Käfer, W.

AU - Kang, D.

AU - Ketzer, B.

AU - Khaustov, G. V.

AU - Khokhlov, Yu A.

AU - Kiefer, J.

AU - Kisselev, Yu

AU - Klein, F.

AU - Klimaszewski, K.

AU - Koblitz, S.

AU - Koivuniemi, J. H.

AU - Kolosov, V. N.

AU - Komissarov, E. V.

AU - Kondo, K.

AU - Königsmann, K.

AU - Konorov, I.

AU - Konstantinov, V. F.

AU - Korzenev, A.

AU - Kotzinian, A. M.

AU - Kouznetsov, O.

AU - Kowalik, K.

AU - Krämer, M.

AU - Kral, A.

AU - Kroumchtein, Z. V.

AU - Kuhn, R.

AU - Kunne, F.

AU - Kurek, K.

AU - Le Goff, J. M.

AU - Lednev, A. A.

AU - Lehmann, A.

AU - Levorato, S.

AU - Lichtenstadt, J.

AU - Liska, T.

AU - Maggiora, A.

AU - Maggiora, M.

AU - Magnon, A.

AU - Mallot, G. K.

AU - Mann, A.

AU - Marchand, C.

AU - Marroncle, J.

AU - Martin, A.

AU - Marzec, J.

AU - Massmann, F.

AU - Matsuda, T.

AU - Maximov, A. N.

AU - Meyer, W.

AU - Michigami, T.

AU - Mikhailov, Yu V.

AU - Moinester, M. A.

AU - Mutter, A.

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PY - 2009/6/1

Y1 - 2009/6/1

N2 - The gluon polarisation in the nucleon has been determined by detecting charm production via D 0 meson decay to charged K and π in polarised muon scattering off a longitudinally polarised deuteron target. The data were taken by the COMPASS Collaboration at CERN between 2002 and 2006 and correspond to an integrated luminosity of 2.8 fb -1. The dominant underlying process of charm production is the photon-gluon fusion to a c over(c, ̄) pair. A leading order QCD approach gives an average gluon polarisation of 〈 Δ g / g 〉 x = - 0.49 ± 0.27 (stat) ± 0.11 (syst) at a scale μ 2 ≈ 13 (GeV / c) 2 and at an average gluon momentum fraction 〈 x 〉 ≈ 0.11. The longitudinal cross-section asymmetry for D 0 production is presented in bins of the transverse momentum and the energy of the D 0 meson.

AB - The gluon polarisation in the nucleon has been determined by detecting charm production via D 0 meson decay to charged K and π in polarised muon scattering off a longitudinally polarised deuteron target. The data were taken by the COMPASS Collaboration at CERN between 2002 and 2006 and correspond to an integrated luminosity of 2.8 fb -1. The dominant underlying process of charm production is the photon-gluon fusion to a c over(c, ̄) pair. A leading order QCD approach gives an average gluon polarisation of 〈 Δ g / g 〉 x = - 0.49 ± 0.27 (stat) ± 0.11 (syst) at a scale μ 2 ≈ 13 (GeV / c) 2 and at an average gluon momentum fraction 〈 x 〉 ≈ 0.11. The longitudinal cross-section asymmetry for D 0 production is presented in bins of the transverse momentum and the energy of the D 0 meson.

KW - Asymmetry

KW - Gluon polarisation

KW - Inelastic muon scattering

KW - Spin

UR - http://www.scopus.com/inward/record.url?scp=65549140094&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2009.04.059

DO - 10.1016/j.physletb.2009.04.059

M3 - Article

AN - SCOPUS:65549140094

SN - 0370-2693

VL - 676

SP - 31

EP - 38

JO - Physics Letters B

JF - Physics Letters B

IS - 1-3

ER -

Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction

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