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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 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.

Registro:

Documento: Artículo
Título:Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization
Autor:Adeva, B. et al.
Este artículo contiene 130 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 130 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:ammonia; butanol; article; artificial neural network; energy; gluon; hadron; lepton; Monte Carlo method; muon; nucleon; photon; polarimeter; polarization; quark; spectrometer
Año:2004
Volumen:70
Número:1
Página de inicio:012002
Página de fin:1-012002-9
DOI: http://dx.doi.org/10.1103/PhysRevD.70.012002
Título revista:Physical Review D - Particles, Fields, Gravitation and Cosmology
Título revista abreviado:Phys Rev D Part Fields Gravit Cosmol
ISSN:05562821
CODEN:PRVDA
CAS:ammonia, 14798-03-9, 51847-23-5, 7664-41-7; butanol, 35296-72-1, 71-36-3
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v70_n1_p012002_Adeva

Referencias:

  • Hughes, V.W., (1990) Nucl. Phys., A518, p. 371
  • Ashman, J., (1989) Nucl. Phys., B328, p. 1
  • (1988) Phys. Lett. B, 206, p. 364
  • Adeva, B., (1993) Phys. Lett. B, 302, p. 533
  • Adeva, B., (1998) Phys. Rev. D, 58, p. 112001
  • Anthony, P.L., (1996) Phys. Rev. D, 54, p. 6620
  • Abe, K., (1998) Phys. Rev. D, 58, p. 112003
  • Abe, K., (1997) Phys. Rev. Lett., 79, p. 26
  • Anthony, P.L., (1999) Phys. Lett. B, 458, p. 529
  • Airapetian, A., (1998) Phys. Lett. B, 442, p. 484
  • Adeva, B., (1998) Phys. Rev. D, 58, p. 112002
  • Anthony, P.L., (2000) Phys. Lett. B, 493, p. 19
  • Altarelli, G., Ball, R.D., Forte, S., Ridolfi, G., (1997) Nucl. Phys., B496, p. 337
  • Leader, E., Sidorov, A.V., Stamenov, D.B., (2002) Eur. Phys. J. C, 23, p. 479
  • Goto, Y., (2000) Phys. Rev. D, 62, p. 034017
  • Glück, M., Reya, E., Stratmann, M., Vogelsang, W., (2001) Phys. Rev. D, 63, p. 094005
  • Blümlein, J., Bottcher, H., (2002) Nucl. Phys., B636, p. 225
  • Bourrely, C., Soffer, J., Buccella, F., (2002) Eur. Phys. J. C, 23, p. 487
  • Efremov, A.V., Teryaev, O.V., (1988) JINR Report No. E2-88-287, , Dubna
  • Altarelli, G., Ross, G.G., (1988) Phys. Lett. B, 212, p. 391
  • Ratcliffe, P.G., (1987) Phys. Lett. B, 192, p. 180
  • Carlitz, R.D., Collins, J.C., Mueller, A.H., (1988) Phys. Lett. B, 214, p. 229
  • Bravar, A., Von Harrach, D., Kotzinian, A., (1998) Phys. Lett. B, 421, p. 349
  • Baum, G., COMPASS: A Proposal for a Common Muon and Proton Apparatus for Structure and Spectroscopy, , Report No. CERN-SPSLC-96-14
  • Airapetian, A., (2000) Phys. Rev. Lett., 84, p. 2584
  • Arneodo, M., (1984) Phys. Lett., 149 B, p. 415
  • (1987) Z. Phys. C, 36, p. 527
  • Adams, M.R., (1993) Phys. Rev. D, 48, p. 5057
  • (1994) Phys. Rev. Lett., 72, p. 466
  • Adams, D., (1997) Phys. Rev. D, 56, p. 5330
  • Adeva, B., (2000) Nucl. Instrum. Methods Phys. Res. A, 443, p. 1
  • Adeva, B., (1999) Nucl. Instrum. Methods Phys. Res. A, 437, p. 23
  • Klosterman, L., (1995), Ph.D. thesis, Delft University of Technology, Delft; Akhundov, A.A., (1996) Fortschr. Phys., 44, p. 373
  • (1977) Sov. J. Nucl. Phys., 26, p. 660
  • (1986) Sov. J. Nucl. Phys., 44, p. 988
  • Bardin, D., Shumeiko, N., (1979) Sov. J. Nucl. Phys., 29, p. 499
  • Kukhto, T.V., Shumeiko, N.M., (1983) Nucl. Phys., B219, p. 412
  • König, A., (1983) Z. Phys. C, 18, p. 63
  • Ingelman, G., Edin, A., Rathsman, J., (1997) Comput. Phys. Commun., 101, p. 108
  • Glück, M., Reya, E., Vogt, A., (1995) Z. Phys. C, 67, p. 433
  • Bravar, A., Kurek, K., Windmolders, R., (1997) Comput. Phys. Commun., 105, p. 42
  • Gehrmann, T., Stirling, W.J., (1996) Phys. Rev. D, 53, p. 6100
  • Sjöstrand, T., (2001) Comput. Phys. Commun., 135, p. 238
  • Makins, N.C.R., private communication; Geiger, P., (1998), Ph.D. thesis, University of Heidelberg; Kowalik, K., (2004), Ph.D. thesis, Institute for Nuclear Studies, Warsaw; Gilly, H., (2000), Ph.D. thesis, University of Freiburg; Kowalik, K., (2001) Acta Phys. Pol. B, 32, p. 2929

Citas:

---------- APA ----------
(2004) . Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization. Physical Review D - Particles, Fields, Gravitation and Cosmology, 70(1), 012002-1-012002-9.
http://dx.doi.org/10.1103/PhysRevD.70.012002
---------- CHICAGO ----------
Adeva, B. "Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization" . Physical Review D - Particles, Fields, Gravitation and Cosmology 70, no. 1 (2004) : 012002-1-012002-9.
http://dx.doi.org/10.1103/PhysRevD.70.012002
---------- MLA ----------
Adeva, B. "Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 70, no. 1, 2004, pp. 012002-1-012002-9.
http://dx.doi.org/10.1103/PhysRevD.70.012002
---------- VANCOUVER ----------
Adeva, B. Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization. Phys Rev D Part Fields Gravit Cosmol. 2004;70(1):012002-1-012002-9.
http://dx.doi.org/10.1103/PhysRevD.70.012002