Abstract
Events with high energy isolated electrons, muons or tau leptons and missing transverse momentum are studied using the full e ± p data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb−1. Within the Standard Model, events with isolated leptons and missing transverse momentum mainly originate from the production of single W bosons. The total single W boson production cross section is measured as 1.14±0.25 (stat.)±0.14 (sys.) pb, in agreement with the Standard Model expectation. The data are also used to establish limits on the WW γ gauge couplings and for a measurement of the W boson polarisation.
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References
T. Ahmed et al. (H1 Collaboration), DESY preprint 94-248 (1994)
C. Adloff et al. (H1 Collaboration), Eur. Phys. J. C 5, 575 (1998). hep-ex/9806009
V. Andreev et al. (H1 Collaboration), Phys. Lett. B 561, 241 (2003). hep-ex/0301030
A. Aktas et al. (H1 Collaboration), Eur. Phys. J. C 33, 9 (2004). hep-ex/0310032
S. Chekanov et al. (ZEUS Collaboration), Phys. Lett. B 559, 153 (2003). hep-ex/0302010
S. Chekanov et al. (ZEUS Collaboration), DESY-03-188
A. Aktas et al. (H1 Collaboration), Phys. Lett. B 599, 159 (2004). hep-ex/0405070
C. Diaconu, DESY-04-006,. hep-ph/0401111
T. Carli, D. Dannheim, L. Bellagamba, Mod. Phys. Lett. A 19, 1881 (2004). hep-ph/0402012
S.Y. Choi et al., Eur. Phys. J. C 51, 543 (2007). hep-ph/0612302
S.Y. Choi et al., Acta Phys. Pol. B 38, 3415 (2007). 0710.3334 [hep-ph]
S. Chekanov et al. (ZEUS Collaboration), 0807.0589 [hep-ex]
S. Chekanov et al. (ZEUS Collaboration), Phys. Lett. B 583, 41 (2004). hep-ex/0311028
A. Aktas et al. (H1 Collaboration), Eur. Phys. J. C 48, 699 (2006). hep-ex/0604022
U. Baur, J.A. Vermaseren, D. Zeppenfeld, Nucl. Phys. B 375, 3 (1992)
K.P. Diener, C. Schwanenberger, M. Spira, hep-ex/0302040
K.P. Diener, C. Schwanenberger, M. Spira, Eur. Phys. J. C 25, 405 (2002). hep-ph/0203269
P. Nason, R. Rückl, M. Spira, J. Phys. G 25, 1434 (1999). hep-ph/9902296
M. Spira, hep-ph/9905469
P. Aurenche et al., Z. Phys. C 56, 589 (1992)
H.L. Lai et al., Phys. Rev. D 55, 1280 (1997). hep-ph/9606399
C. Diaconu, Parton shower effects for W production at HERA, in Proceedings of the Workshop “Monte Carlo Generators for HERA Physics”, ed. by A.T. Doyle et al., DESY (1998), DESY-PROC-1999-02, 631
H. Jung, RAPGAP version 3.1. Comput. Phys. Commun. 86, 147 (1995)
A. Kwiatkowski, H. Spiesberger, H.J. Möhring, Comput. Phys. Commun. 69, 155 (1992)
C. Berger, P. Kandel, A new generator for wide angle bremsstrahlung, in Proceedings of the Workshop “Monte Carlo Generators for HERA Physics”, ed. by A.T. Doyle et al., DESY (1998), DESY-PROC-1999-02, p. 596
T. Sjöstrand, S. Mrenna, P. Skands, PYTHIA version 6.4. J. High Energy Phys. 0605, 026 (2006). hep-ph/0603175
C. Adloff et al. (H1 Collaboration), Eur. Phys. J. C 25, 13 (2002). hep-ex/0201006
A. Aktas et al. (H1 Collaboration), Phys. Lett. B 602, 14 (2004). hep-ex/0408044
G.A. Schuler, H. Spiesberger, DJANGOH version 1.4, Django: the interface for the event generators heracles and lepto, in Proceedings of the Workshop “Physics at HERA”, vol. 3, ed. by W. Buchmüller and G. Ingelman, DESY (1991), p. 1419
L. Lönnblad, Comput. Phys. Commun. 71, 15 (1992)
T. Abe, GRAPE version 1.1. Comput. Phys. Commun. 136, 126 (2001). hep-ph/0012029
R. Brun et al., “GEANT3 user’s guide”, CERN-DD/EE/84-1
I. Abt et al. (H1 Collaboration), Nucl. Instrum. Methods A 386, 310 (1997)
I. Abt et al. (H1 Collaboration), Nucl. Instrum. Methods A 386, 348 (1997)
B. Andrieu et al. (H1 Calorimeter Group Collaboration), Nucl. Instrum. Methods A 336, 460 (1993)
B. Andrieu et al. (H1 Calorimeter Group Collaboration), Nucl. Instrum. Methods A 336, 499 (1993)
B. Andrieu et al. (H1 Calorimeter Group Collaboration), Nucl. Instrum. Methods A 350, 57 (1994)
R.D. Appuhn et al. (H1 SPACAL Group Collaboration), Nucl. Instrum. Methods A 386, 397 (1997)
C. Kleinwort, H1 alignment experience, in Proceedings of “First LHC Detector Alignment Workshop”, ed. by S. Blusk et al., CERN (2006), CERN-2007-04, 41
C. Adloff et al. (H1 Collaboration), Eur. Phys. J. C 30, 1 (2003). hep-ex/0304003
P. Bruel, Recherche d’interactions au-delà du Modèle Standard à HERA. Ph.D. thesis, Université Paris (1998), available at http://www-h1.desy.de/psfiles/theses/
C. Adloff et al. (H1 Collaboration), Eur. Phys. J. C 13, 609 (2000). hep-ex/9908059
A. Aktas et al. (H1 Collaboration), Phys. Lett. B 583, 28 (2004). hep-ex/0311015
F.D. Aaron et al. (H1 Collaboration), Phys. Lett. B 668, 268 (2008). 0806.3987 [hep-ex]
M. Peez, Recherche de déviations au Model Standard dans les processus de grande énergie transverse sur le collisionneur électron-proton HERA. Ph.D. thesis, Université de Lyon (2003), DESY-THESIS-2003-023, available at http://www-h1.desy.de/psfiles/theses/
B. Portheault, Première mesure des sections efficaces de courant chargé et neutre avec le faisceau de positrons polarisé à HERA II et analyses QCD-électrofaibles. Ph.D. thesis, Université Paris XI (2005), LAL-05-05, available at http://www-h1.desy.de/psfiles/theses/
S.D. Ellis, D.E. Soper, Phys. Rev. D 48, 3160 (1993). hep-ph/9305266
S. Catani et al., Nucl. Phys. B 406, 187 (1993)
F. Jacquet, A. Blondel, Detectors for charged current events, in Proceedings of “Study of an ep Facility for Europe”, ed. by U. Amaldi, DESY (1979), DESY 79/48, 391
D.M. South, Events with isolated leptons and missing transverse momentum in e + p collisions at HERA. Ph.D. thesis, University of Manchester (2003), DESY-THESIS-2003-030, available at http://www-h1.desy.de/psfiles/theses/
G. Brandt, Analysis of events with isolated leptons and missing transverse momentum in ep collisions at HERA. Ph.D. thesis, University of Heidelberg (2007), available at http://www-h1.desy.de/psfiles/theses/
Y.R. de Boer, Measurement of single W boson production in ep scattering. Ph.D. thesis, Institute for Theoretical and Experimental Physics, Moscow (2007), available at http://www-h1.desy.de/psfiles/theses/
W.M. Yao et al. (Particle Data Group), J. Phys. G 33, 1 (2006)
U. Baur, D. Zeppenfeld, Nucl. Phys. B 325, 253 (1989)
K. Hagiwara et al., Nucl. Phys. B 282, 253 (1987)
F. Herzog, Phys. Lett. B 148, 355 (1984) [Erratum: Phys. Lett. B 155, 468 (1985)]
J.C. Wallet, Phys. Rev. D 32, 813 (1985)
J.A. Grifols, S. Peris, J. Sola, Phys. Lett. B 197, 437 (1987) [Erratum: Phys. Lett. B 218, 508 (1989)]
M. Suzuki, Phys. Lett. B 153, 289 (1985)
J.J. Van Der Bij, Phys. Rev. D 35, 1088 (1987)
V.M. Abazov et al. (DØ Collaboration), Phys. Rev. D 71, 091108 (2005). hep-ex/0503048
T. Aaltonen et al. (CDF Collaboration), Phys. Rev. D 76, 111103 (2007). 0705.2247 [hep-ex]
S. Schael et al. (ALEPH Collaboration), Phys. Lett. B 614, 7 (2005)
J. Abdallah et al. (DELPHI Collaboration), Eur. Phys. J. C 54, 345 (2008). 0801.1235 [hep-ex]
P. Achard et al. (L3 Collaboration), Phys. Lett. B 586, 151 (2004). hep-ex/0402036
G. Abbiendi et al. (OPAL Collaboration), Eur. Phys. J. C 33, 463 (2004). hep-ex/0308067
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The H1 Collaboration., Aaron, F.D., Alexa, C. et al. Events with isolated leptons and missing transverse momentum and measurement of W production at HERA. Eur. Phys. J. C 64, 251 (2009). https://doi.org/10.1140/epjc/s10052-009-1160-6
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DOI: https://doi.org/10.1140/epjc/s10052-009-1160-6