The polarised valence quark distribution from semi-inclusive DIS

M. Alekseev; V. Yu Alexakhin; Yu Alexandrov; G. D. Alexeev; A. Amoroso; A. Arbuzov; B. Badełek; F. Balestra; J. Ball; J. Barth; G. Baum; Y. Bedfer; C. Bernet; 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; A. Cicuttin; M. Colantoni; S. Costa; M. L. Crespo; S. Dalla Torre; T. Dafni; S. Das; S. S. Dasgupta; R. De Masi; N. Dedek; O. Yu Denisov; L. Dhara; V. Diaz; A. M. Dinkelbach; S. V. Donskov; V. A. Dorofeev; N. Doshita; V. Duic; W. Dünnweber; P. D. Eversheim; W. Eyrich; M. Faessler; V. Falaleev; A. Ferrero; L. Ferrero; M. Finger; M. Finger; H. Fischer; C. Franco; J. Franz; J. M. Friedrich; V. Frolov; R. Garfagnini; F. Gautheron; O. P. Gavrichtchouk; R. Gazda; S. Gerassimov; R. Geyer; M. Giorgi; B. Gobbo; S. Goertz; A. M. Gorin; S. Grabmüller; O. A. Grajek; A. Grasso; B. Grube; R. Gushterski; A. Guskov; F. Haas; J. Hannappel; D. von Harrach; T. Hasegawa; J. Heckmann; S. Hedicke; F. H. Heinsius; R. Hermann; C. Heß; F. Hinterberger; M. von Hodenberg; N. Horikawa; S. Horikawa; N. d'Hose; C. Ilgner; A. I. Ioukaev; S. Ishimoto; O. Ivanov; Yu Ivanshin; T. Iwata; R. Jahn; A. Janata; P. Jasinski; R. Joosten; N. I. Jouravlev; 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; E. V. Komissarov; K. Kondo; K. Königsmann; I. Konorov; V. F. Konstantinov; A. S. Korentchenko; A. Korzenev; A. M. Kotzinian; N. A. Koutchinski; O. Kouznetsov; A. Kral; N. P. Kravchuk; Z. V. Kroumchtein; R. Kuhn; F. Kunne; K. Kurek; M. E. Ladygin; M. Lamanna; J. M. Le Goff; A. A. Lednev; A. Lehmann; S. Levorato; J. Lichtenstadt; T. Liska; I. Ludwig; 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; A. Mielech; Yu V. Mikhailov; M. A. Moinester; A. Mutter; A. Nagaytsev; T. Nagel; O. Nähle; J. Nassalski; S. Neliba; F. Nerling; S. Neubert; D. P. Neyret; V. I. Nikolaenko; K. Nikolaev; A. G. Olshevsky; M. Ostrick; A. Padee; P. Pagano; S. Panebianco; R. Panknin; D. Panzieri; S. Paul; B. Pawlukiewicz-Kaminska; D. V. Peshekhonov; V. D. Peshekhonov; G. Piragino; S. Platchkov; J. Pochodzalla; J. Polak; V. A. Polyakov; J. Pretz; S. Procureur; C. Quintans; J. F. Rajotte; S. Ramos; V. Rapatsky; G. Reicherz; D. Reggiani; A. Richter; F. Robinet; E. Rocco; E. Rondio; A. M. Rozhdestvensky; D. I. Ryabchikov; V. D. Samoylenko; A. Sandacz; H. Santos; M. G. Sapozhnikov; S. Sarkar; I. A. Savin; P. Schiavon; C. Schill; L. Schmitt; P. Schönmeier; 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; F. Stinzing; M. Stolarski; V. P. Sugonyaev; M. Sulc; R. Sulej; V. V. Tchalishev; S. Tessaro; F. Tessarotto; A. Teufel; L. G. Tkatchev; G. Venugopal; M. Virius; N. V. Vlassov; A. Vossen; R. Webb; E. Weise; Q. Weitzel; R. Windmolders; S. Wirth; W. Wiślicki; H. Wollny; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; J. Zhao; R. Ziegler; A. Zvyagin

doi:10.1016/j.physletb.2007.12.056

The polarised valence quark distribution from semi-inclusive DIS

M. Alekseev, V. Yu Alexakhin, Yu Alexandrov, G. D. Alexeev, A. Amoroso, A. Arbuzov, B. Badełek, F. Balestra, J. Ball, J. Barth, G. Baum, Y. Bedfer, C. Bernet, 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, A. Cicuttin, M. Colantoni, S. Costa, M. L. Crespo, S. Dalla Torre, T. Dafni, S. Das, S. S. Dasgupta, R. De Masi, N. Dedek, O. Yu Denisov, L. Dhara, V. Diaz, A. M. Dinkelbach, S. V. Donskov, V. A. Dorofeev, N. Doshita, V. Duic, W. Dünnweber, P. D. Eversheim, W. Eyrich, M. Faessler, V. Falaleev, A. Ferrero, L. Ferrero, M. Finger, M. Finger, H. Fischer, C. Franco, J. Franz, J. M. Friedrich, V. Frolov, R. Garfagnini, F. Gautheron, O. P. Gavrichtchouk, R. Gazda, S. Gerassimov, R. Geyer, M. Giorgi, B. Gobbo, S. Goertz, A. M. Gorin, S. Grabmüller, O. A. Grajek, A. Grasso, B. Grube, R. Gushterski, A. Guskov, F. Haas, J. Hannappel, D. von Harrach, T. Hasegawa, J. Heckmann, S. Hedicke, F. H. Heinsius, R. Hermann, C. Heß, F. Hinterberger, M. von Hodenberg, N. Horikawa, S. Horikawa, N. d'Hose, C. Ilgner, A. I. Ioukaev, S. Ishimoto, O. Ivanov, Yu Ivanshin, T. Iwata, R. Jahn, A. Janata, P. Jasinski, R. Joosten, N. I. Jouravlev, 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, E. V. Komissarov, K. Kondo, K. Königsmann, I. Konorov, V. F. Konstantinov, A. S. Korentchenko, A. Korzenev, A. M. Kotzinian, N. A. Koutchinski, O. Kouznetsov, A. Kral, N. P. Kravchuk, Z. V. Kroumchtein, R. Kuhn, F. Kunne, K. Kurek, M. E. Ladygin, M. Lamanna, J. M. Le Goff, A. A. Lednev, A. Lehmann, S. Levorato, J. Lichtenstadt, T. Liska, I. Ludwig, 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, A. Mielech, Yu V. Mikhailov, M. A. Moinester, A. Mutter, A. Nagaytsev, T. Nagel, O. Nähle, J. Nassalski, S. Neliba, F. Nerling, S. Neubert, D. P. Neyret, V. I. Nikolaenko, K. Nikolaev, A. G. Olshevsky, M. Ostrick, A. Padee, P. Pagano, S. Panebianco, R. Panknin, D. Panzieri, S. Paul, B. Pawlukiewicz-Kaminska, D. V. Peshekhonov, V. D. Peshekhonov, G. Piragino, S. Platchkov, J. Pochodzalla, J. Polak, V. A. Polyakov, J. Pretz, S. Procureur, C. Quintans, J. F. Rajotte, S. Ramos, V. Rapatsky, G. Reicherz, D. Reggiani, A. Richter, F. Robinet, E. Rocco, E. Rondio, A. M. Rozhdestvensky, D. I. Ryabchikov, V. D. Samoylenko, A. Sandacz, H. Santos, M. G. Sapozhnikov, S. Sarkar, I. A. Savin, P. Schiavon, C. Schill, L. Schmitt, P. Schönmeier, 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, F. Stinzing, M. Stolarski, V. P. Sugonyaev, M. Sulc, R. Sulej, V. V. Tchalishev, S. Tessaro, F. Tessarotto, A. Teufel, L. G. Tkatchev, G. Venugopal, M. Virius, N. V. Vlassov, A. Vossen, R. Webb, E. Weise, Q. Weitzel, R. Windmolders, S. Wirth, W. Wiślicki, H. Wollny, K. Zaremba, M. Zavertyaev, E. Zemlyanichkina, J. Zhao, R. Ziegler, A. Zvyagin

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

The semi-inclusive difference asymmetry A^{h⁺ - h^-} for hadrons of opposite charge has been measured by the COMPASS experiment at CERN. The data were collected in the years 2002-2004 using a 160 GeV polarised muon beam scattered off a large polarised ⁶LiD target in the kinematic range 0.006 < x < 0.7 and 1 < Q² < 100 (GeV / c)². In leading order QCD (LO) the deuteron asymmetry A^{h⁺ - h^-} measures the valence quark polarisation and provides an evaluation of the first moment of Δ u_v + Δ d_v which is found to be equal to 0.40 ± 0.07 (stat.) ± 0.06 (syst.) over the measured range of x at Q² = 10 (GeV / c)². When combined with the first moment of g₁^d previously measured on the same data, this result favours a non-symmetric polarisation of light quarks Δ over(u, ̄) = - Δ over(d, ̄) at a confidence level of two standard deviations, in contrast to the often assumed symmetric scenario Δ over(u, ̄) = Δ over(d, ̄) = Δ over(s, ̄) = Δ s.

Lingua originale	Inglese
pagine (da-a)	458-465
Numero di pagine	8
Rivista	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	660
Numero di pubblicazione	5
DOI	https://doi.org/10.1016/j.physletb.2007.12.056
Stato di pubblicazione	Pubblicato - 6 mar 2008
Pubblicato esternamente	Sì

Accesso al documento

10.1016/j.physletb.2007.12.056

Altri file e collegamenti

Link to publication in Scopus

Cita questo

Alekseev, M., Alexakhin, V. Y., Alexandrov, Y., Alexeev, G. D., Amoroso, A., Arbuzov, A., Badełek, B., Balestra, F., Ball, J., Barth, J., Baum, G., Bedfer, Y., Bernet, C., Bertini, R., Bettinelli, M., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., ... Zvyagin, A. (2008). The polarised valence quark distribution from semi-inclusive DIS. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 660(5), 458-465. https://doi.org/10.1016/j.physletb.2007.12.056

@article{462f8172fdc64e4dbd5762dbd3b90a70,

title = "The polarised valence quark distribution from semi-inclusive DIS",

abstract = "The semi-inclusive difference asymmetry Ah+ - h- for hadrons of opposite charge has been measured by the COMPASS experiment at CERN. The data were collected in the years 2002-2004 using a 160 GeV polarised muon beam scattered off a large polarised 6LiD target in the kinematic range 0.006 < x < 0.7 and 1 < Q2 < 100 (GeV / c)2. In leading order QCD (LO) the deuteron asymmetry Ah+ - h- measures the valence quark polarisation and provides an evaluation of the first moment of Δ uv + Δ dv which is found to be equal to 0.40 ± 0.07 (stat.) ± 0.06 (syst.) over the measured range of x at Q2 = 10 (GeV / c)2. When combined with the first moment of g1d previously measured on the same data, this result favours a non-symmetric polarisation of light quarks Δ over(u,{\= }) = - Δ over(d,{\= }) at a confidence level of two standard deviations, in contrast to the often assumed symmetric scenario Δ over(u,{\= }) = Δ over(d,{\= }) = Δ over(s,{\= }) = Δ s.",

keywords = "Deep inelastic scattering, Structure functions",

author = "M. Alekseev and Alexakhin, {V. Yu} and Yu Alexandrov and Alexeev, {G. D.} and A. Amoroso and A. Arbuzov and B. Bade{\l}ek and F. Balestra and J. Ball and J. Barth and G. Baum and Y. Bedfer and C. Bernet 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 A. Cicuttin and M. Colantoni and S. Costa and Crespo, {M. L.} and {Dalla Torre}, S. and T. Dafni and S. Das and Dasgupta, {S. S.} and {De Masi}, R. and N. Dedek and Denisov, {O. Yu} and L. Dhara and V. Diaz and Dinkelbach, {A. M.} and Donskov, {S. V.} and Dorofeev, {V. A.} and N. Doshita and V. Duic and W. D{\"u}nnweber and Eversheim, {P. D.} and W. Eyrich and M. Faessler and V. Falaleev and A. Ferrero and L. Ferrero and M. Finger and M. Finger and H. Fischer and C. Franco and J. Franz and Friedrich, {J. M.} and V. Frolov 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 Gorin, {A. M.} 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 J. Hannappel and {von Harrach}, D. and T. Hasegawa and J. Heckmann and S. Hedicke and Heinsius, {F. H.} and R. Hermann and C. He{\ss} and F. Hinterberger and {von Hodenberg}, M. and N. Horikawa and S. Horikawa and N. d'Hose and C. Ilgner and Ioukaev, {A. I.} and S. Ishimoto and O. Ivanov and Yu Ivanshin and T. Iwata and R. Jahn and A. Janata and P. Jasinski and R. Joosten and Jouravlev, {N. I.} 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 Komissarov, {E. V.} and K. Kondo and K. K{\"o}nigsmann and I. Konorov and Konstantinov, {V. F.} and Korentchenko, {A. S.} and A. Korzenev and Kotzinian, {A. M.} and Koutchinski, {N. A.} and O. Kouznetsov and A. Kral and Kravchuk, {N. P.} and Kroumchtein, {Z. V.} and R. Kuhn and F. Kunne and K. Kurek and Ladygin, {M. E.} and M. Lamanna and {Le Goff}, {J. M.} and Lednev, {A. A.} and A. Lehmann and S. Levorato and J. Lichtenstadt and T. Liska and I. Ludwig 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 A. Mielech and Mikhailov, {Yu V.} and Moinester, {M. A.} and A. Mutter and A. Nagaytsev and T. Nagel and O. N{\"a}hle and J. Nassalski and S. Neliba and F. Nerling and S. Neubert and Neyret, {D. P.} and Nikolaenko, {V. I.} and K. Nikolaev and Olshevsky, {A. G.} and M. Ostrick and A. Padee and P. Pagano and S. Panebianco and R. Panknin and D. Panzieri and S. Paul and B. Pawlukiewicz-Kaminska and Peshekhonov, {D. V.} and Peshekhonov, {V. D.} and G. Piragino and S. Platchkov and J. Pochodzalla and J. Polak and Polyakov, {V. A.} and J. Pretz and S. Procureur 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 Rozhdestvensky, {A. M.} 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 P. Schiavon and C. Schill and L. Schmitt and P. Sch{\"o}nmeier 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 F. Stinzing and M. Stolarski and Sugonyaev, {V. P.} and M. Sulc and R. Sulej and Tchalishev, {V. V.} 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 R. Webb and E. Weise and Q. Weitzel and R. Windmolders and S. Wirth and W. Wi{\'s}licki and H. Wollny and K. Zaremba and M. Zavertyaev and E. Zemlyanichkina and J. Zhao and R. Ziegler and A. Zvyagin",

year = "2008",

month = mar,

day = "6",

doi = "10.1016/j.physletb.2007.12.056",

language = "English",

volume = "660",

pages = "458--465",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "5",

}

Alekseev, M, Alexakhin, VY, Alexandrov, Y, Alexeev, GD, Amoroso, A, Arbuzov, A, Badełek, B, Balestra, F, Ball, J, Barth, J, Baum, G, Bedfer, Y, Bernet, C, 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, Cicuttin, A, Colantoni, M, Costa, S, Crespo, ML, Dalla Torre, S, Dafni, T, Das, S, Dasgupta, SS, De Masi, R, Dedek, N, Denisov, OY, Dhara, L, Diaz, V, Dinkelbach, AM, Donskov, SV, Dorofeev, VA, Doshita, N, Duic, V, Dünnweber, W, Eversheim, PD, Eyrich, W, Faessler, M, Falaleev, V, Ferrero, A, Ferrero, L, Finger, M, Finger, M, Fischer, H, Franco, C, Franz, J, Friedrich, JM, Frolov, V, Garfagnini, R, Gautheron, F, Gavrichtchouk, OP, Gazda, R, Gerassimov, S, Geyer, R, Giorgi, M, Gobbo, B, Goertz, S, Gorin, AM, Grabmüller, S, Grajek, OA, Grasso, A, Grube, B, Gushterski, R, Guskov, A, Haas, F, Hannappel, J, von Harrach, D, Hasegawa, T, Heckmann, J, Hedicke, S, Heinsius, FH, Hermann, R, Heß, C, Hinterberger, F, von Hodenberg, M, Horikawa, N, Horikawa, S, d'Hose, N, Ilgner, C, Ioukaev, AI, Ishimoto, S, Ivanov, O, Ivanshin, Y, Iwata, T, Jahn, R, Janata, A, Jasinski, P, Joosten, R, Jouravlev, NI, Kabuß, E, Kang, D, Ketzer, B, Khaustov, GV, Khokhlov, YA, Kisselev, Y, Klein, F, Klimaszewski, K, Koblitz, S, Koivuniemi, JH, Kolosov, VN, Komissarov, EV, Kondo, K, Königsmann, K, Konorov, I, Konstantinov, VF, Korentchenko, AS, Korzenev, A, Kotzinian, AM, Koutchinski, NA, Kouznetsov, O, Kral, A, Kravchuk, NP, Kroumchtein, ZV, Kuhn, R, Kunne, F, Kurek, K, Ladygin, ME, Lamanna, M, Le Goff, JM, Lednev, AA, Lehmann, A, Levorato, S, Lichtenstadt, J, Liska, T, Ludwig, I, 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, Mielech, A, Mikhailov, YV, Moinester, MA, Mutter, A, Nagaytsev, A, Nagel, T, Nähle, O, Nassalski, J, Neliba, S, Nerling, F, Neubert, S, Neyret, DP, Nikolaenko, VI, Nikolaev, K, Olshevsky, AG, Ostrick, M, Padee, A, Pagano, P, Panebianco, S, Panknin, R, Panzieri, D, Paul, S, Pawlukiewicz-Kaminska, B, Peshekhonov, DV, Peshekhonov, VD, Piragino, G, Platchkov, S, Pochodzalla, J, Polak, J, Polyakov, VA, Pretz, J, Procureur, S, Quintans, C, Rajotte, JF, Ramos, S, Rapatsky, V, Reicherz, G, Reggiani, D, Richter, A, Robinet, F, Rocco, E, Rondio, E, Rozhdestvensky, AM, Ryabchikov, DI, Samoylenko, VD, Sandacz, A, Santos, H, Sapozhnikov, MG, Sarkar, S, Savin, IA, Schiavon, P, Schill, C, Schmitt, L, Schönmeier, P, Schröder, W, Shevchenko, OY, Siebert, HW, Silva, L, Sinha, L, Sissakian, AN, Slunecka, M, Smirnov, GI, Sosio, S, Sozzi, F, Srnka, A, Stinzing, F, Stolarski, M, Sugonyaev, VP, Sulc, M, Sulej, R, Tchalishev, VV, Tessaro, S, Tessarotto, F, Teufel, A, Tkatchev, LG, Venugopal, G, Virius, M, Vlassov, NV, Vossen, A, Webb, R, Weise, E, Weitzel, Q, Windmolders, R, Wirth, S, Wiślicki, W, Wollny, H, Zaremba, K, Zavertyaev, M, Zemlyanichkina, E, Zhao, J, Ziegler, R & Zvyagin, A 2008, 'The polarised valence quark distribution from semi-inclusive DIS', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 660, n. 5, pagg. 458-465. https://doi.org/10.1016/j.physletb.2007.12.056

TY - JOUR

T1 - The polarised valence quark distribution from semi-inclusive DIS

AU - Alekseev, M.

AU - Alexakhin, V. Yu

AU - Alexandrov, Yu

AU - Alexeev, G. D.

AU - Amoroso, A.

AU - Arbuzov, A.

AU - Badełek, B.

AU - Balestra, F.

AU - Ball, J.

AU - Barth, J.

AU - Baum, G.

AU - Bedfer, Y.

AU - Bernet, C.

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 - Cicuttin, A.

AU - Colantoni, M.

AU - Costa, S.

AU - Crespo, M. L.

AU - Dalla Torre, S.

AU - Dafni, T.

AU - Das, S.

AU - Dasgupta, S. S.

AU - De Masi, R.

AU - Dedek, N.

AU - Denisov, O. Yu

AU - Dhara, L.

AU - Diaz, V.

AU - Dinkelbach, A. M.

AU - Donskov, S. V.

AU - Dorofeev, V. A.

AU - Doshita, N.

AU - Duic, V.

AU - Dünnweber, W.

AU - Eversheim, P. D.

AU - Eyrich, W.

AU - Faessler, M.

AU - Falaleev, V.

AU - Ferrero, A.

AU - Ferrero, L.

AU - Finger, M.

AU - Fischer, H.

AU - Franco, C.

AU - Franz, J.

AU - Friedrich, J. M.

AU - Frolov, V.

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 - Gorin, A. M.

AU - Grabmüller, S.

AU - Grajek, O. A.

AU - Grasso, A.

AU - Grube, B.

AU - Gushterski, R.

AU - Guskov, A.

AU - Haas, F.

AU - Hannappel, J.

AU - von Harrach, D.

AU - Hasegawa, T.

AU - Heckmann, J.

AU - Hedicke, S.

AU - Heinsius, F. H.

AU - Hermann, R.

AU - Heß, C.

AU - Hinterberger, F.

AU - von Hodenberg, M.

AU - Horikawa, N.

AU - Horikawa, S.

AU - d'Hose, N.

AU - Ilgner, C.

AU - Ioukaev, A. I.

AU - Ishimoto, S.

AU - Ivanov, O.

AU - Ivanshin, Yu

AU - Iwata, T.

AU - Jahn, R.

AU - Janata, A.

AU - Jasinski, P.

AU - Joosten, R.

AU - Jouravlev, N. I.

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 - Komissarov, E. V.

AU - Kondo, K.

AU - Königsmann, K.

AU - Konorov, I.

AU - Konstantinov, V. F.

AU - Korentchenko, A. S.

AU - Korzenev, A.

AU - Kotzinian, A. M.

AU - Koutchinski, N. A.

AU - Kouznetsov, O.

AU - Kral, A.

AU - Kravchuk, N. P.

AU - Kroumchtein, Z. V.

AU - Kuhn, R.

AU - Kunne, F.

AU - Kurek, K.

AU - Ladygin, M. E.

AU - Lamanna, M.

AU - Le Goff, J. M.

AU - Lednev, A. A.

AU - Lehmann, A.

AU - Levorato, S.

AU - Lichtenstadt, J.

AU - Liska, T.

AU - Ludwig, I.

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 - Mielech, A.

AU - Mikhailov, Yu V.

AU - Moinester, M. A.

AU - Mutter, A.

AU - Nagaytsev, A.

AU - Nagel, T.

AU - Nähle, O.

AU - Nassalski, J.

AU - Neliba, S.

AU - Nerling, F.

AU - Neubert, S.

AU - Neyret, D. P.

AU - Nikolaenko, V. I.

AU - Nikolaev, K.

AU - Olshevsky, A. G.

AU - Ostrick, M.

AU - Padee, A.

AU - Pagano, P.

AU - Panebianco, S.

AU - Panknin, R.

AU - Panzieri, D.

AU - Paul, S.

AU - Pawlukiewicz-Kaminska, B.

AU - Peshekhonov, D. V.

AU - Peshekhonov, V. D.

AU - Piragino, G.

AU - Platchkov, S.

AU - Pochodzalla, J.

AU - Polak, J.

AU - Polyakov, V. A.

AU - Pretz, J.

AU - Procureur, S.

AU - Quintans, C.

AU - Rajotte, J. F.

AU - Ramos, S.

AU - Rapatsky, V.

AU - Reicherz, G.

AU - Reggiani, D.

AU - Richter, A.

AU - Robinet, F.

AU - Rocco, E.

AU - Rondio, E.

AU - Rozhdestvensky, A. M.

AU - Ryabchikov, D. I.

AU - Samoylenko, V. D.

AU - Sandacz, A.

AU - Santos, H.

AU - Sapozhnikov, M. G.

AU - Sarkar, S.

AU - Savin, I. A.

AU - Schiavon, P.

AU - Schill, C.

AU - Schmitt, L.

AU - Schönmeier, P.

AU - Schröder, W.

AU - Shevchenko, O. Yu

AU - Siebert, H. W.

AU - Silva, L.

AU - Sinha, L.

AU - Sissakian, A. N.

AU - Slunecka, M.

AU - Smirnov, G. I.

AU - Sosio, S.

AU - Sozzi, F.

AU - Srnka, A.

AU - Stinzing, F.

AU - Stolarski, M.

AU - Sugonyaev, V. P.

AU - Sulc, M.

AU - Sulej, R.

AU - Tchalishev, V. V.

AU - Tessaro, S.

AU - Tessarotto, F.

AU - Teufel, A.

AU - Tkatchev, L. G.

AU - Venugopal, G.

AU - Virius, M.

AU - Vlassov, N. V.

AU - Vossen, A.

AU - Webb, R.

AU - Weise, E.

AU - Weitzel, Q.

AU - Windmolders, R.

AU - Wirth, S.

AU - Wiślicki, W.

AU - Wollny, H.

AU - Zaremba, K.

AU - Zavertyaev, M.

AU - Zemlyanichkina, E.

AU - Zhao, J.

AU - Ziegler, R.

AU - Zvyagin, A.

PY - 2008/3/6

Y1 - 2008/3/6

N2 - The semi-inclusive difference asymmetry Ah+ - h- for hadrons of opposite charge has been measured by the COMPASS experiment at CERN. The data were collected in the years 2002-2004 using a 160 GeV polarised muon beam scattered off a large polarised 6LiD target in the kinematic range 0.006 < x < 0.7 and 1 < Q2 < 100 (GeV / c)2. In leading order QCD (LO) the deuteron asymmetry Ah+ - h- measures the valence quark polarisation and provides an evaluation of the first moment of Δ uv + Δ dv which is found to be equal to 0.40 ± 0.07 (stat.) ± 0.06 (syst.) over the measured range of x at Q2 = 10 (GeV / c)2. When combined with the first moment of g1d previously measured on the same data, this result favours a non-symmetric polarisation of light quarks Δ over(u, ̄) = - Δ over(d, ̄) at a confidence level of two standard deviations, in contrast to the often assumed symmetric scenario Δ over(u, ̄) = Δ over(d, ̄) = Δ over(s, ̄) = Δ s.

AB - The semi-inclusive difference asymmetry Ah+ - h- for hadrons of opposite charge has been measured by the COMPASS experiment at CERN. The data were collected in the years 2002-2004 using a 160 GeV polarised muon beam scattered off a large polarised 6LiD target in the kinematic range 0.006 < x < 0.7 and 1 < Q2 < 100 (GeV / c)2. In leading order QCD (LO) the deuteron asymmetry Ah+ - h- measures the valence quark polarisation and provides an evaluation of the first moment of Δ uv + Δ dv which is found to be equal to 0.40 ± 0.07 (stat.) ± 0.06 (syst.) over the measured range of x at Q2 = 10 (GeV / c)2. When combined with the first moment of g1d previously measured on the same data, this result favours a non-symmetric polarisation of light quarks Δ over(u, ̄) = - Δ over(d, ̄) at a confidence level of two standard deviations, in contrast to the often assumed symmetric scenario Δ over(u, ̄) = Δ over(d, ̄) = Δ over(s, ̄) = Δ s.

KW - Deep inelastic scattering

KW - Structure functions

UR - http://www.scopus.com/inward/record.url?scp=39249085537&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2007.12.056

DO - 10.1016/j.physletb.2007.12.056

M3 - Article

SN - 0370-2693

VL - 660

SP - 458

EP - 465

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 5

ER -

The polarised valence quark distribution from semi-inclusive DIS

Abstract

Accesso al documento

Altri file e collegamenti

Fingerprint

Cita questo