Leading order determination of the gluon polarisation from DIS events with high-pT hadron pairs

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; J. Bernhard; R. Bertini; M. Bettinelli; K. Bicker; J. Bieling; R. Birsa; J. Bisplinghoff; Paula Bordalo; F. Bradamante; C. Braun; A. Bravar; A. Bressan; E. Burtin; D. Chaberny; M. Chiosso; S. U. Chung; A. Cicuttin; M. L. Crespo; S. Dalla Torre; S. Das; S. 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; R. Garfagnini; F. Gautheron; O. P. Gavrichtchouk; R. Gazda; 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; S. Hedicke; 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; 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; J. M. Le Goff; A. A. Lednev; A. Lehmann; S. Levorato; J. Lichtenstadt; A. Maggiora; A. Magnon; N. Makke; G. K. Mallot; A. Mann; C. Marchand; A. Martin; J. Marzec; T. Matsuda; W. Meyer; T. Michigami; Yu V. Mikhailov; M. A. Moinester; A. Morreale; A. Mutter; A. Nagaytsev; T. Nagel; J. P. Nassalski; 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; G. Pontecorvo; J. Pretz; S. L. Procureur; M. Quaresma; C. Quintans; J. F. Rajotte; S. Ramos; V. Rapatsky; G. Reicherz; A. Richter; 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; K. Schmidt; L. Schmitt; 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; M. Stolarski; M. Sulc; R. Sulej; 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; R. Windmolders; W. Wiślicki; H. Wollny; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; M. Ziembicki; N. Zhuravlev; A. Zvyagin

doi:10.1016/j.physletb.2012.11.056

Leading order determination of the gluon polarisation from DIS events with high-p_T hadron pairs

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, J. Bernhard, R. Bertini, M. Bettinelli, K. Bicker, J. Bieling, R. Birsa, J. BisplinghoffPaula Bordalo, F. Bradamante, C. Braun, A. Bravar, A. Bressan, E. Burtin, D. Chaberny, M. Chiosso, S. U. Chung, A. Cicuttin, M. L. Crespo, S. Dalla Torre, S. Das, S. 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, R. Garfagnini, F. Gautheron, O. P. Gavrichtchouk, R. Gazda, 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, S. Hedicke, 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, 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, J. M. Le Goff, A. A. Lednev, A. Lehmann, S. Levorato, J. Lichtenstadt, A. Maggiora, A. Magnon, N. Makke, G. K. Mallot, A. Mann, C. Marchand, A. Martin, J. Marzec, T. Matsuda, W. Meyer, T. Michigami, Yu V. Mikhailov, M. A. Moinester, A. Morreale, A. Mutter, A. Nagaytsev, T. Nagel, J. P. Nassalski, 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, G. Pontecorvo, J. Pretz, S. L. Procureur, M. Quaresma, C. Quintans, J. F. Rajotte, S. Ramos, V. Rapatsky, G. Reicherz, A. Richter, 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, K. Schmidt, L. Schmitt, 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, M. Stolarski, M. Sulc, R. Sulej, 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, R. Windmolders, W. Wiślicki, H. Wollny, K. Zaremba, M. Zavertyaev, E. Zemlyanichkina, M. Ziembicki, N. Zhuravlev, A. Zvyagin

Chair of Physics I

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

55 Scopus citations

Abstract

We present a determination of the gluon polarisation δg/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with Q²>1(GeV/c)² including a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised LiD6 target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction x_g covering the range 0.04<x_g<0.27. The values obtained at leading order in QCD do not show any significant dependence on x_g. Their average is δg/g=0.125±0.060(stat.)±0.063(syst.) at average x_g=0.09 and a scale of μ²=3(GeV/c)².

Original language	English
Pages (from-to)	922-930
Number of pages	9
Journal	Physics Letters B
Volume	718
Issue number	3
DOIs	https://doi.org/10.1016/j.physletb.2012.11.056
State	Published - 8 Jan 2013

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10.1016/j.physletb.2012.11.056

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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., Bernhard, J., Bertini, R., Bettinelli, M., Bicker, K., Bieling, J., Birsa, R., ... Zvyagin, A. (2013). Leading order determination of the gluon polarisation from DIS events with high-p_T hadron pairs. Physics Letters B, 718(3), 922-930. https://doi.org/10.1016/j.physletb.2012.11.056

@article{152e3a014c5e49f5baa3b254971c3297,

title = "Leading order determination of the gluon polarisation from DIS events with high-pT hadron pairs",

abstract = "We present a determination of the gluon polarisation δg/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with Q2>1(GeV/c)2 including a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised LiD6 target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction xg covering the range 0.04g<0.27. The values obtained at leading order in QCD do not show any significant dependence on xg. Their average is δg/g=0.125±0.060(stat.)±0.063(syst.) at average xg=0.09 and a scale of μ2=3(GeV/c)2.",

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 J. Bernhard and R. Bertini and M. Bettinelli and K. Bicker and J. Bieling and R. Birsa and J. Bisplinghoff and Paula Bordalo and F. Bradamante and C. Braun and A. Bravar and A. Bressan and E. Burtin and D. Chaberny 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 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 R. Garfagnini and F. Gautheron and Gavrichtchouk, {O. P.} and R. Gazda 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 S. Hedicke 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 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 {Le Goff}, {J. M.} and Lednev, {A. A.} and A. Lehmann and S. Levorato and J. Lichtenstadt 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 W. Meyer and T. Michigami and Mikhailov, {Yu V.} and Moinester, {M. A.} and A. Morreale and A. Mutter and A. Nagaytsev and T. Nagel and Nassalski, {J. P.} 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 G. Pontecorvo and J. Pretz and Procureur, {S. L.} and M. Quaresma and C. Quintans and Rajotte, {J. F.} and S. Ramos and V. Rapatsky and G. Reicherz and A. Richter 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 K. Schmidt and L. Schmitt 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 M. Stolarski and M. Sulc and R. Sulej 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 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 = jan,

day = "8",

doi = "10.1016/j.physletb.2012.11.056",

language = "English",

volume = "718",

pages = "922--930",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "3",

}

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, Bernhard, J, Bertini, R, Bettinelli, M, Bicker, K, Bieling, J, Birsa, R, Bisplinghoff, J, Bordalo, P, Bradamante, F, Braun, C, Bravar, A, Bressan, A, Burtin, E, Chaberny, D, Chiosso, M, Chung, SU, Cicuttin, A, Crespo, ML, Dalla Torre, S, Das, S, Dasgupta, SS, 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, Garfagnini, R, Gautheron, F, Gavrichtchouk, OP, Gazda, R, 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, Hedicke, S, 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, 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, Le Goff, JM, Lednev, AA, Lehmann, A, Levorato, S, Lichtenstadt, J, Maggiora, A, Magnon, A, Makke, N, Mallot, GK, Mann, A, Marchand, C, Martin, A, Marzec, J, Matsuda, T, Meyer, W, Michigami, T, Mikhailov, YV, Moinester, MA, Morreale, A, Mutter, A, Nagaytsev, A, Nagel, T, Nassalski, JP, 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, Pontecorvo, G, Pretz, J, Procureur, SL, Quaresma, M, Quintans, C, Rajotte, JF, Ramos, S, Rapatsky, V, Reicherz, G, Richter, A, 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, K, Schmitt, L, Schönning, K, Schopferer, S, Schott, M, Shevchenko, OY, Silva, L, Sinha, L, Sissakian, AN, Slunecka, M, Smirnov, GI, Sosio, S, Sozzi, F, Srnka, A, Stolarski, M, Sulc, M, Sulej, R, 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, Windmolders, R, Wiślicki, W, Wollny, H, Zaremba, K, Zavertyaev, M, Zemlyanichkina, E, Ziembicki, M, Zhuravlev, N & Zvyagin, A 2013, 'Leading order determination of the gluon polarisation from DIS events with high-p_T hadron pairs', Physics Letters B, vol. 718, no. 3, pp. 922-930. https://doi.org/10.1016/j.physletb.2012.11.056

TY - JOUR

T1 - Leading order determination of the gluon polarisation from DIS events with high-pT hadron pairs

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 - Bernhard, J.

AU - Bertini, R.

AU - Bettinelli, M.

AU - Bicker, K.

AU - Bieling, J.

AU - Birsa, R.

AU - Bisplinghoff, J.

AU - Bordalo, Paula

AU - Bradamante, F.

AU - Braun, C.

AU - Bravar, A.

AU - Bressan, A.

AU - Burtin, E.

AU - Chaberny, D.

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 - 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 - Garfagnini, R.

AU - Gautheron, F.

AU - Gavrichtchouk, O. P.

AU - Gazda, R.

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 - Hedicke, S.

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 - 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 - Le Goff, J. M.

AU - Lednev, A. A.

AU - Lehmann, A.

AU - Levorato, S.

AU - Lichtenstadt, J.

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 - Meyer, W.

AU - Michigami, T.

AU - Mikhailov, Yu V.

AU - Moinester, M. A.

AU - Morreale, A.

AU - Mutter, A.

AU - Nagaytsev, A.

AU - Nagel, T.

AU - Nassalski, J. P.

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.

AU - Perevalova, E.

AU - Pesaro, G.

AU - Peshekhonov, D. V.

AU - Piragino, G.

AU - Platchkov, S.

AU - Pochodzalla, J.

AU - Polak, J.

AU - Polyakov, V. A.

AU - Pontecorvo, G.

AU - Pretz, J.

AU - Procureur, S. L.

AU - Quaresma, M.

AU - Quintans, C.

AU - Rajotte, J. F.

AU - Ramos, S.

AU - Rapatsky, V.

AU - Reicherz, G.

AU - Richter, A.

AU - Rocco, E.

AU - Rondio, E.

AU - Rossiyskaya, N. S.

AU - Ryabchikov, D. I.

AU - Samoylenko, V. D.

AU - Sandacz, A.

AU - Sapozhnikov, M. G.

AU - Sarkar, S.

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AU - Sbrizzai, G.

AU - Schiavon, P.

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AU - Schlüter, T.

AU - Schmidt, K.

AU - Schmitt, L.

AU - Schönning, K.

AU - Schopferer, S.

AU - Schott, M.

AU - Shevchenko, O. Yu

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AU - Slunecka, M.

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AU - Sznajder, P.

AU - Takekawa, S.

AU - Ter Wolbeek, J.

AU - Tessaro, S.

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AU - Tkatchev, L. G.

AU - Uhl, S.

AU - Uman, I.

AU - Vandenbroucke, M.

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AU - Vlassov, N. V.

AU - Wang, L.

AU - Windmolders, R.

AU - Wiślicki, W.

AU - Wollny, H.

AU - Zaremba, K.

AU - Zavertyaev, M.

AU - Zemlyanichkina, E.

AU - Ziembicki, M.

AU - Zhuravlev, N.

AU - Zvyagin, A.

PY - 2013/1/8

Y1 - 2013/1/8

N2 - We present a determination of the gluon polarisation δg/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with Q2>1(GeV/c)2 including a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised LiD6 target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction xg covering the range 0.04g<0.27. The values obtained at leading order in QCD do not show any significant dependence on xg. Their average is δg/g=0.125±0.060(stat.)±0.063(syst.) at average xg=0.09 and a scale of μ2=3(GeV/c)2.

AB - We present a determination of the gluon polarisation δg/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with Q2>1(GeV/c)2 including a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised LiD6 target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction xg covering the range 0.04g<0.27. The values obtained at leading order in QCD do not show any significant dependence on xg. Their average is δg/g=0.125±0.060(stat.)±0.063(syst.) at average xg=0.09 and a scale of μ2=3(GeV/c)2.

UR - http://www.scopus.com/inward/record.url?scp=84871614827&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2012.11.056

DO - 10.1016/j.physletb.2012.11.056

M3 - Article

AN - SCOPUS:84871614827

SN - 0370-2693

VL - 718

SP - 922

EP - 930

JO - Physics Letters B

JF - Physics Letters B

IS - 3

ER -

Leading order determination of the gluon polarisation from DIS events with high-p_T hadron pairs

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