Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization

B. Adeva; E. Arik; A. Arvidson; B. Badelek; G. Baum; P. Berglund; L. Betev; R. Birsa; N. de Botton; F. Bradamante; A. Bravar; A. Bressan; S. Bültmann; E. Burtin; D. Crabb; J. Cranshaw; T. Çuhadar; S. Dalla Torre; R. van Dantzig; B. Derro; A. Deshpande; S. Dhawan; C. Dulya; S. Eichblatt; D. Fasching; F. Feinstein; C. Fernandez; B. Frois; A. Gallas; J. A. Garzon; H. Gilly; M. Giorgi; E. von Goeler; S. Goertz; G. Gracia; N. de Groot; M. Grosse Perdekamp; K. Haft; D. von Harrach; T. Hasegawa; P. Hautle; N. Hayashi; C. A. Heusch; N. Horikawa; V. W. Hughes; G. Igo; S. Ishimoto; T. Iwata; E. M. Kabuß; A. Karev; H. J. Kessler; T. J. Ketel; J. Kiryluk; Yu Kisselev; L. Klostermann; K. Kowalik; A. Kotzinian; W. Kröger; F. Kunne; K. Kurek; J. Kyynäräinen; M. Lamanna; U. Landgraf; J. M. Le Goff; F. Lehar; A. de Lesquen; J. Lichtenstadt; M. Litmaath; A. Magnon; G. K. Mallot; F. Marie; A. Martin; J. Martino; T. Matsuda; B. Mayes; J. S. McCarthy; K. Medved; W. Meyer; D. Miller; Y. Miyachi; K. Mori; J. Moromisato; J. Nassalski; T. O. Niinikoski; J. E.J. Oberski; A. Ogawa; C. Ozben; H. Pereira; D. Peshekhonov; R. Piegaia; L. Pinsky; S. Platchkov; M. Plo; D. Pose; H. Postma; J. Pretz; G. Rädel; G. Reicherz; J. Roberts; M. Rodriguez; E. Rondio; I. Sabo; J. Saborido; A. Sandacz; I. Savin; P. Schiavon; E. P. Sichtermann; F. Simeoni; G. I. Smirnov; A. Staude; A. Steinmetz; U. Stiegler; H. Stuhrmann; R. Sulej; F. Tessarotto; D. Thers; W. Tlaczala; A. Tripet; G. Unel; M. Velasco; J. Vogt; R. Voss; C. Whitten; R. Windmolders; R. Willumeit; W. Wiślicki; A. Witzmann; A. M. Zanetti; K. Zaremba; J. Zhao

doi:10.1103/PhysRevD.70.012002

Spin asymmetries for events with high p_T hadrons in DIS and an evaluation of the gluon polarization

B. Adeva^*, E. Arik, A. Arvidson, B. Badelek, G. Baum, P. Berglund, L. Betev, R. Birsa, N. de Botton, F. Bradamante, A. Bravar, A. Bressan, S. Bültmann, E. Burtin, D. Crabb, J. Cranshaw, T. Çuhadar, S. Dalla Torre, R. van Dantzig, B. DerroA. Deshpande, S. Dhawan, C. Dulya, S. Eichblatt, D. Fasching, F. Feinstein, C. Fernandez, B. Frois, A. Gallas, J. A. Garzon, H. Gilly, M. Giorgi, E. von Goeler, S. Goertz, G. Gracia, N. de Groot, M. Grosse Perdekamp, K. Haft, D. von Harrach, T. Hasegawa, P. Hautle, N. Hayashi, C. A. Heusch, N. Horikawa, V. W. Hughes, G. Igo, S. Ishimoto, T. Iwata, E. M. Kabuß, A. Karev, H. J. Kessler, T. J. Ketel, J. Kiryluk, Yu Kisselev, L. Klostermann, K. Kowalik, A. Kotzinian, W. Kröger, F. Kunne, K. Kurek, J. Kyynäräinen, M. Lamanna, U. Landgraf, J. M. Le Goff, F. Lehar, A. de Lesquen, J. Lichtenstadt, M. Litmaath, A. Magnon, G. K. Mallot, F. Marie, A. Martin, J. Martino, T. Matsuda, B. Mayes, J. S. McCarthy, K. Medved, W. Meyer, D. Miller, Y. Miyachi, K. Mori, J. Moromisato, J. Nassalski, T. O. Niinikoski, J. E.J. Oberski, A. Ogawa, C. Ozben, H. Pereira, D. Peshekhonov, R. Piegaia, L. Pinsky, S. Platchkov, M. Plo, D. Pose, H. Postma, J. Pretz, G. Rädel, G. Reicherz, J. Roberts, M. Rodriguez, E. Rondio, I. Sabo, J. Saborido, A. Sandacz, I. Savin, P. Schiavon, E. P. Sichtermann, F. Simeoni, G. I. Smirnov, A. Staude, A. Steinmetz, U. Stiegler, H. Stuhrmann, R. Sulej, F. Tessarotto, D. Thers, W. Tlaczala, A. Tripet, G. Unel, M. Velasco, J. Vogt, R. Voss, C. Whitten, R. Windmolders, R. Willumeit, W. Wiślicki, A. Witzmann, A. M. Zanetti, K. Zaremba, J. Zhao

^*Corresponding author for this work

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Abstract

We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of event classification are used to increase the contribution of the photon-gluon fusion process to above 30%. The most effective one, based on a neural network approach, provides the asymmetries A_p^{ℓN→ℓhhX}=0.030±0.057(stat)±0. 010(syst) and A_d^{ℓN→ℓhhX}=0.070±0. 076(stat)±0.010(syst). From these values we derive an averaged gluon polarization ΔG/G=-0.20±0.28(stat)±0.10(syst) at an average fraction of nucleon momentum carried by gluons 〈η〉 = 0.07.

Original language	English
Article number	012002
Pages (from-to)	012002-1-012002-9
Journal	Physical Review D
Volume	70
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevD.70.012002
Publication status	Published - Jul 2004
Externally published	Yes

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10.1103/PhysRevD.70.012002

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Adeva, B., Arik, E., Arvidson, A., Badelek, B., Baum, G., Berglund, P., Betev, L., Birsa, R., de Botton, N., Bradamante, F., Bravar, A., Bressan, A., Bültmann, S., Burtin, E., Crabb, D., Cranshaw, J., Çuhadar, T., Dalla Torre, S., van Dantzig, R., ... Zhao, J. (2004). Spin asymmetries for events with high p_T hadrons in DIS and an evaluation of the gluon polarization. Physical Review D, 70(1), 012002-1-012002-9. Article 012002. https://doi.org/10.1103/PhysRevD.70.012002

@article{f55cc8f581414cfd925c4dfd28456ecb,

title = "Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization",

abstract = "We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of event classification are used to increase the contribution of the photon-gluon fusion process to above 30%. The most effective one, based on a neural network approach, provides the asymmetries ApℓN→ℓhhX=0.030±0.057(stat)±0. 010(syst) and AdℓN→ℓhhX=0.070±0. 076(stat)±0.010(syst). From these values we derive an averaged gluon polarization ΔG/G=-0.20±0.28(stat)±0.10(syst) at an average fraction of nucleon momentum carried by gluons 〈η〉 = 0.07.",

author = "B. Adeva and E. Arik and A. Arvidson and B. Badelek and G. Baum and P. Berglund and L. Betev and R. Birsa and {de Botton}, N. and F. Bradamante and A. Bravar and A. Bressan and S. B{\"u}ltmann and E. Burtin and D. Crabb and J. Cranshaw and T. {\c C}uhadar and {Dalla Torre}, S. and {van Dantzig}, R. and B. Derro and A. Deshpande and S. Dhawan and C. Dulya and S. Eichblatt and D. Fasching and F. Feinstein and C. Fernandez and B. Frois and A. Gallas and Garzon, {J. A.} and H. Gilly and M. Giorgi and {von Goeler}, E. and S. Goertz and G. Gracia and {de Groot}, N. and {Grosse Perdekamp}, M. and K. Haft and {von Harrach}, D. and T. Hasegawa and P. Hautle and N. Hayashi and Heusch, {C. A.} and N. Horikawa and Hughes, {V. W.} and G. Igo and S. Ishimoto and T. Iwata and Kabu{\ss}, {E. M.} and A. Karev and Kessler, {H. J.} and Ketel, {T. J.} and J. Kiryluk and Yu Kisselev and L. Klostermann and K. Kowalik and A. Kotzinian and W. Kr{\"o}ger and F. Kunne and K. Kurek and J. Kyyn{\"a}r{\"a}inen and M. Lamanna and U. Landgraf and {Le Goff}, {J. M.} and F. Lehar and {de Lesquen}, A. and J. Lichtenstadt and M. Litmaath and A. Magnon and Mallot, {G. K.} and F. Marie and A. Martin and J. Martino and T. Matsuda and B. Mayes and McCarthy, {J. S.} and K. Medved and W. Meyer and D. Miller and Y. Miyachi and K. Mori and J. Moromisato and J. Nassalski and Niinikoski, {T. O.} and Oberski, {J. E.J.} and A. Ogawa and C. Ozben and H. Pereira and D. Peshekhonov and R. Piegaia and L. Pinsky and S. Platchkov and M. Plo and D. Pose and H. Postma and J. Pretz and G. R{\"a}del and G. Reicherz and J. Roberts and M. Rodriguez and E. Rondio and I. Sabo and J. Saborido and A. Sandacz and I. Savin and P. Schiavon and Sichtermann, {E. P.} and F. Simeoni and Smirnov, {G. I.} and A. Staude and A. Steinmetz and U. Stiegler and H. Stuhrmann and R. Sulej and F. Tessarotto and D. Thers and W. Tlaczala and A. Tripet and G. Unel and M. Velasco and J. Vogt and R. Voss and C. Whitten and R. Windmolders and R. Willumeit and W. Wi{\'s}licki and A. Witzmann and Zanetti, {A. M.} and K. Zaremba and J. Zhao",

year = "2004",

month = jul,

doi = "10.1103/PhysRevD.70.012002",

language = "English",

volume = "70",

pages = "012002--1--012002--9",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics",

number = "1",

}

Adeva, B, Arik, E, Arvidson, A, Badelek, B, Baum, G, Berglund, P, Betev, L, Birsa, R, de Botton, N, Bradamante, F, Bravar, A, Bressan, A, Bültmann, S, Burtin, E, Crabb, D, Cranshaw, J, Çuhadar, T, Dalla Torre, S, van Dantzig, R, Derro, B, Deshpande, A, Dhawan, S, Dulya, C, Eichblatt, S, Fasching, D, Feinstein, F, Fernandez, C, Frois, B, Gallas, A, Garzon, JA, Gilly, H, Giorgi, M, von Goeler, E, Goertz, S, Gracia, G, de Groot, N, Grosse Perdekamp, M, Haft, K, von Harrach, D, Hasegawa, T, Hautle, P, Hayashi, N, Heusch, CA, Horikawa, N, Hughes, VW, Igo, G, Ishimoto, S, Iwata, T, Kabuß, EM, Karev, A, Kessler, HJ, Ketel, TJ, Kiryluk, J, Kisselev, Y, Klostermann, L, Kowalik, K, Kotzinian, A, Kröger, W, Kunne, F, Kurek, K, Kyynäräinen, J, Lamanna, M, Landgraf, U, Le Goff, JM, Lehar, F, de Lesquen, A, Lichtenstadt, J, Litmaath, M, Magnon, A, Mallot, GK, Marie, F, Martin, A, Martino, J, Matsuda, T, Mayes, B, McCarthy, JS, Medved, K, Meyer, W, Miller, D, Miyachi, Y, Mori, K, Moromisato, J, Nassalski, J, Niinikoski, TO, Oberski, JEJ, Ogawa, A, Ozben, C, Pereira, H, Peshekhonov, D, Piegaia, R, Pinsky, L, Platchkov, S, Plo, M, Pose, D, Postma, H, Pretz, J, Rädel, G, Reicherz, G, Roberts, J, Rodriguez, M, Rondio, E, Sabo, I, Saborido, J, Sandacz, A, Savin, I, Schiavon, P, Sichtermann, EP, Simeoni, F, Smirnov, GI, Staude, A, Steinmetz, A, Stiegler, U, Stuhrmann, H, Sulej, R, Tessarotto, F, Thers, D, Tlaczala, W, Tripet, A, Unel, G, Velasco, M, Vogt, J, Voss, R, Whitten, C, Windmolders, R, Willumeit, R, Wiślicki, W, Witzmann, A, Zanetti, AM, Zaremba, K & Zhao, J 2004, 'Spin asymmetries for events with high p_T hadrons in DIS and an evaluation of the gluon polarization', Physical Review D, vol. 70, no. 1, 012002, pp. 012002-1-012002-9. https://doi.org/10.1103/PhysRevD.70.012002

TY - JOUR

T1 - Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization

AU - Adeva, B.

AU - Arik, E.

AU - Arvidson, A.

AU - Badelek, B.

AU - Baum, G.

AU - Berglund, P.

AU - Betev, L.

AU - Birsa, R.

AU - de Botton, N.

AU - Bradamante, F.

AU - Bravar, A.

AU - Bressan, A.

AU - Bültmann, S.

AU - Burtin, E.

AU - Crabb, D.

AU - Cranshaw, J.

AU - Çuhadar, T.

AU - Dalla Torre, S.

AU - van Dantzig, R.

AU - Derro, B.

AU - Deshpande, A.

AU - Dhawan, S.

AU - Dulya, C.

AU - Eichblatt, S.

AU - Fasching, D.

AU - Feinstein, F.

AU - Fernandez, C.

AU - Frois, B.

AU - Gallas, A.

AU - Garzon, J. A.

AU - Gilly, H.

AU - Giorgi, M.

AU - von Goeler, E.

AU - Goertz, S.

AU - Gracia, G.

AU - de Groot, N.

AU - Grosse Perdekamp, M.

AU - Haft, K.

AU - von Harrach, D.

AU - Hasegawa, T.

AU - Hautle, P.

AU - Hayashi, N.

AU - Heusch, C. A.

AU - Horikawa, N.

AU - Hughes, V. W.

AU - Igo, G.

AU - Ishimoto, S.

AU - Iwata, T.

AU - Kabuß, E. M.

AU - Karev, A.

AU - Kessler, H. J.

AU - Ketel, T. J.

AU - Kiryluk, J.

AU - Kisselev, Yu

AU - Klostermann, L.

AU - Kowalik, K.

AU - Kotzinian, A.

AU - Kröger, W.

AU - Kunne, F.

AU - Kurek, K.

AU - Kyynäräinen, J.

AU - Lamanna, M.

AU - Landgraf, U.

AU - Le Goff, J. M.

AU - Lehar, F.

AU - de Lesquen, A.

AU - Lichtenstadt, J.

AU - Litmaath, M.

AU - Magnon, A.

AU - Mallot, G. K.

AU - Marie, F.

AU - Martin, A.

AU - Martino, J.

AU - Matsuda, T.

AU - Mayes, B.

AU - McCarthy, J. S.

AU - Medved, K.

AU - Meyer, W.

AU - Miller, D.

AU - Miyachi, Y.

AU - Mori, K.

AU - Moromisato, J.

AU - Nassalski, J.

AU - Niinikoski, T. O.

AU - Oberski, J. E.J.

AU - Ogawa, A.

AU - Ozben, C.

AU - Pereira, H.

AU - Peshekhonov, D.

AU - Piegaia, R.

AU - Pinsky, L.

AU - Platchkov, S.

AU - Plo, M.

AU - Pose, D.

AU - Postma, H.

AU - Pretz, J.

AU - Rädel, G.

AU - Reicherz, G.

AU - Roberts, J.

AU - Rodriguez, M.

AU - Rondio, E.

AU - Sabo, I.

AU - Saborido, J.

AU - Sandacz, A.

AU - Savin, I.

AU - Schiavon, P.

AU - Sichtermann, E. P.

AU - Simeoni, F.

AU - Smirnov, G. I.

AU - Staude, A.

AU - Steinmetz, A.

AU - Stiegler, U.

AU - Stuhrmann, H.

AU - Sulej, R.

AU - Tessarotto, F.

AU - Thers, D.

AU - Tlaczala, W.

AU - Tripet, A.

AU - Unel, G.

AU - Velasco, M.

AU - Vogt, J.

AU - Voss, R.

AU - Whitten, C.

AU - Windmolders, R.

AU - Willumeit, R.

AU - Wiślicki, W.

AU - Witzmann, A.

AU - Zanetti, A. M.

AU - Zaremba, K.

AU - Zhao, J.

PY - 2004/7

Y1 - 2004/7

N2 - We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of event classification are used to increase the contribution of the photon-gluon fusion process to above 30%. The most effective one, based on a neural network approach, provides the asymmetries ApℓN→ℓhhX=0.030±0.057(stat)±0. 010(syst) and AdℓN→ℓhhX=0.070±0. 076(stat)±0.010(syst). From these values we derive an averaged gluon polarization ΔG/G=-0.20±0.28(stat)±0.10(syst) at an average fraction of nucleon momentum carried by gluons 〈η〉 = 0.07.

AB - We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of event classification are used to increase the contribution of the photon-gluon fusion process to above 30%. The most effective one, based on a neural network approach, provides the asymmetries ApℓN→ℓhhX=0.030±0.057(stat)±0. 010(syst) and AdℓN→ℓhhX=0.070±0. 076(stat)±0.010(syst). From these values we derive an averaged gluon polarization ΔG/G=-0.20±0.28(stat)±0.10(syst) at an average fraction of nucleon momentum carried by gluons 〈η〉 = 0.07.

UR - http://www.scopus.com/inward/record.url?scp=37649027661&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.70.012002

DO - 10.1103/PhysRevD.70.012002

M3 - Article

AN - SCOPUS:37649027661

SN - 0556-2821

VL - 70

SP - 012002-1-012002-9

JO - Physical Review D

JF - Physical Review D

IS - 1

M1 - 012002

ER -

Spin asymmetries for events with high p_T hadrons in DIS and an evaluation of the gluon polarization

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