Measurement of charge asymmetry in hadronic Z decays

Décamp, D.; Deschizeaux, B.; Goy, C.; Less, J.-P.; Minard, M.-N.; Alemany, R.; Crespo, J.M.; Delfino, M.; Fernández, E.; Gaitan, V.; Garrido, Ll.; Mató, P.; Mir, L. M.; Pacheco, A.; Catanesi, M. G.; Creanza, D.; Palma, M. De; Farilla, A.; Iaselli, G.; Mäggi, G.; Maggi, M.; Natali, S.; Nuzzo, S.; Quattromini, M.; Ranieri, A.; Raso, G.; Romanò, F.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Zito, G.; Hu, H.; Huang, D.; Huang, X. T.; Lin, J.; Lou, J.; Qiao, C. F.; Ruan, T.; Wang, T.; Xie, Y.; Xu, D.; Xu, R.; Zhang, J.; Zhao, W.; Atwood, W. B.; Bird, F.; Blucher, E.; Bonvicini, G.; Bossi, F.; Brown, D. N.; Burnett, T. H.; Drevermann, H.; Dydak, F.; Forty, R.; Grab, C.; Hagelberg, R.; Haywood, A.; Hilgart, J.; Jost, B.; Kasemann, M.; Knobloch, J.; Lacourt, A.; Lançon, E.; Lehraus, I.; Löhse, T.; Marchioro, A.; Martı́nez, M.; May, J.; Menary, S.; Minten, A.; Miotto, A.; Miquel, R.; Moser, H. G.; Nash, J.; Palazzi, P.; Ranjard, F.; Redlinger, G.; Roth, A.; Rothberg, J.; Rotscheidt, H.; Denis, R. St.; Schlatter, D.; Takashima, M.; Talby, M.; Tejessy, W.; Wachsmuth, H.; Wasserbaech, S.; Wheeler, S.; Wiedenmann, W.; Witzeling, W.; Wotschack, J.; Ajaltouni, Z.; Bardadin-Otwinowska, M.; Falvard, A.; Fellous, R. El; Harvey, J.; Henrard, P.; Jousset, J.; Michel, B.; Montret, J. C.; Pallin, D.; Perret, P.; Proriol, J.; Prulhière, F.; Stimpfl, G.; Hansen, J. D.; Hansen, J. R.; Hansen, P. H.; Möllerud, R.; Nielsen, E.R.; Nilsson, B.S.; Efthymiopoulos, I.; Simopoulou, E.; Vayaki, A.; Badier, J.; Blondel, A.; Bonneaud, G. R.; Bourotte, J.; Braems, F.; Brient, J. C.; Fouque, G.; Gamess, A.; Guirlet, R.; Orteu, S.; Rosowsky, A.; Rougé, A.; Rumpf, M.; Tanaka, R.; Videau, H.; Candlin, D. J.; Veitch, E.; Parrini, G.; Corden, M.; Georgiopoulos, C.; Ikeda, M.; Lannutti, J.; Levinthal, D.; Mermikides, M.; Sawyer, L.; Antonelli, A.; Baldini, R.; Bencivenni, G.; Bologna, G.; Campana, P.; Capon, G.; Chiarella, V.; D’Ettorre-Piazzoli, B.; Felici, G.; Laurelli, P.; Mannocchi, G.; Massimo-Brancaccio, F.; Murtas, F.; Murtas, F.; Nicoletti, G.; Passalacqua, L.; Pepe-Altarelli, M.; Picchi, P.; Zografou, P.; Altoon, B.; Boyle, O.; Halley, A.W.; Have, I. ten; Hearns, J. L.; Lynch, J.G.; Morton, W. T.; Raine, C.; Scarr, J. M.; Smith, K. M.; Thompson, A. S.; Turnbull, R.M.; Brandl, B.; Braun, O.; Geiges, R.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E. E.; Maumary, Y.; Putzer, A.; Rensch, B.; Stahl, A.; Tittel, K.; Wunsch, M.; Belk, A. T.; Beuselinck, R.; Binnie, D. M.; Cameron, W.; Cattaneo, M.; Dornan, P. J.; Dugeay, S.; Greene, A. M.; Hassard, J. F.; Lieske, N. M.; Patton, S.; Payne, D. G.; Phillips, M. J.; Sedgbeer, J. K.; Taylor, G. P.; Tomalin, I. R.; Wright, A. G.; Girtler, P.; Kühn, D.; Rudolph, G.; Bowdery, C. K.; Brodbeck, T. J.; Finch, A. J.; Foster, F.; Hughes, G.; Keemer, N. R.; Nuttall, M.; Patel, Apoorva; Rowlingson, B. S.; Sloan, T.; Snow, S. W.; Whelan, E. P.; Barczewski, T.; Bauerdick, L. A. T.; Kleinknecht, K.; Renk, B.; Roehn, S.; Sander, A.-G.; Schmelling, M.; Schmidt, H.; Steeg, F.; Albanèse, J.P.; Aubert, J.J.; Benchouk, C.; Bernard, Véronique; Bonissent, A.; Courvoisier, D.; Etienne, F.; Papalexiou, S.; Payre, P.; Pietrzyk, B.; Qian, Z.; Becker, H.; Blum, W.; Cattaneo, P. W.; Cowan, G.; Dehning, B.; Dietl, H.; Fernández-Bosman, M.; Hansl‐Kozanecka, T.; Jahn, A.; Kozanecki, W.; Lange, E.; Lauber, J.; Lütjens, G.; Lütz, G.; Männer, W.; Richter, R.; Schröder, J.; Schwarz, A. S.; Settles, R.; Stierlin, U.; Thomas, J. P.; Wolf, G.; Bertín, V.; Boucrot, J.; Callot, O.; Chen, X.; Cordier, A.; Davier, M.; Ganis, G.; Grivaz, J.-F.; Heusse, P.; Janot, P.; Kim, D.W.; Diberber, F. Le; Lefrançois, J.; Lutz, A. M.; Veillet, J. J.; Videau, I.; Zhang, Z.; Zomer, F.; Amendolia, S. R.; Bagliesi, G.; Batignani, G.; Bosisio, L.; Bottigli, U.; Bradaschia, C.; Carpinelli, M.; Ciocci, M. A.; Dell’Orso, R.; Ferrante, I.; Fidecaro, F.; Foà, L.; Focardi, E.; Forti, F.; Giassi, A.; Giorgi, M. A.; Ligabue, F.; Lusiani, A.; Mannelli, E. B.; Marrocchesi, P. S.; Messineo, A.; Moneta, L.; Palla, F.; Sanguinetti, G.; Steinberger, J.; Тенчини, Р.; Tonelli, G.; Triggiani, G.; Viannini, C.; Venturi, A.; Verdini, P. G.; Walsh, J.; Carter, J.M.; Green, M.G.; March, P.V.; Medcalf, T.; Quazi, I. S.; Saich, M.; Strong, J. A.; Thomas, R. M.; West, L.R.; Wildish, T.; Botterill, D.; Clifft, R. W.; Edgecock, R.; Edwards, M.; Fisher, S. M.; Jones, T. J.; Norton, P. R.; Salmon, D. P.; Thompson, J.C.; Bloch-Devaux, B.; Colas, P.; Klopfenstein, C.; Locci, E.; Loucatos, S.; Monnier, E.; Pérez, P.; Perlas, J. A.; Perrier, Frédéric; Rander, J.; Renardy, J. F.; Roussarie, A.; Schuller, J. P.; Schwindling, J.; Vallage, B.; Ashman, J. G.; Booth, C. N.; Buttar, C. M.; Carney, R.; Cartwright, S. L.; Combley, F.; Dinsdale, M.; Doḡru, M.; Hatfield, F.; Martin, J. P.; Parker, D.; Reeves, P.; Thompson, L.F.; Brandt, Siegmund; Burkhardt, Hans; Grupen, C.; Meinhard, H.; Mirabito, L.; Neugebauer, E.; Schäfer, U.; Seywerd, H.; Apollinari, G.; Giannini, G.; Gobbo, B.; Liello, F.; Rolandi, G.; Stiegler, U.; Bellantoni, L.; Boudreau, J.; Cinabro, D.; Conway, J.; Cowen, D. F.; DeWeerd, A.J.; Feng, Z.; Ferguson, D.P.S.; Gao, Y. S.; Grahl, J.; Harton, J. L.; Jacobsen, J.; Jared, R. C.; Johnson, R.P.; LeClaire, B. W.; Pan, Y.; Pater, J. R.; Saadi, Y.; Sharma, V.; Walsh, A. M.; Wear, J.; Weber, F. V.; Whitney, Milton; Sau, Lan. Wu; Zhou, Zhengfang; Zobernig, G.

doi:10.1016/0370-2693(91)90844-g

Cited by 40 publications

(11 citation statements)

References 26 publications

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“…Here a particular scattering is called "forward" if the negatively charged quark or antiquark scatters into the forward hemisphere of the electron beam. The hadronic forwardbackward asymmetry of this process was studied at PEP [27], in PETRA [28], in TRIS-TAN [29] and in LEP [30]. We chose to concentrate on the results of TRISTAN and LEP.…”

Section: A3 Hadronic Forward-backward Asymmetry In E + E − Collidersmentioning

confidence: 99%

Comprehensive study of leptoquark bounds

1994

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We make a comprehensive study of indirect bounds on scalar leptoquarks that couple chirally and diagonally to the first generation by examining available data from low energy experiments as well as from high energy e + e − and pp accelerators.The strongest bounds turn out to arise from low energy data: For leptoquarks that couple to right-handed quarks, the most stringent bound comes from atomic parity violation. For leptoquarks that couple to left-handed quarks, there are two mass regions: At low masses the bounds arise from atomic parity violation or from universality in leptonic π decays. At masses above a few hundred GeV's the dominant bounds come from the FCNC processes that are unavoidable in these leptoquarks: The FCNC bound of the up sector, that arises from D 0 −D 0 mixing, combines with the FCNC bounds from the down sector, that arise from rare K decays and K 0 −K 0 mixing, to a bound on the flavour conserving coupling to the first generation.The bounds restrict leptoquarks that couple with electromagnetic strength to lie above 600 GeV or 630 GeV for leptoquarks that couple to RH quarks, and above 1040 GeV, 440 GeV, and 750 GeV for the SU(2) W scalar, doublet and triplet leptoquarks that couple to LH quarks. These bounds are considerably stronger than the first results from the direct searches at HERA. Our bounds also already exclude large regions in the parameter space that could be examined by various methods proposed for indirect leptoquark searches.

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Section: A3 Hadronic Forward-backward Asymmetry In E + E − Collidersmentioning

confidence: 99%

Comprehensive study of leptoquark bounds

1994

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“…Such a jet-charge method has been employed in the identification of light quarks, for instance in Ref. [11]. First, this can result in a definite charge relation between the whole jet and the B flavor.…”

Section: Fragmentation Of B Andb Quarksmentioning

confidence: 99%

Method for flavor tagging in neutralBmeson decays

1993

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“…Hadronic forward backward asymmetries in e + e − machines: The process we look at is e + e − −→ qq, where a particular scattering is called "forward" if the negatively charged quark or antiquark scatters into the forward hemisphere of the electron beam. Hadronic forward-backward asymmetry was studied at PEP [22], in PETRA [23], in TRISTAN [24] and in LEP [25]. We concentrated on the results of TRISTAN and LEP, and found that TRISTAN data gives the stricter bounds on the leptoquarks parameters.…”

Section: Other Boundsmentioning

confidence: 99%

Bounds on vector leptoquarks

Leurer

1994

Phys. Rev. D

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We derive bounds on vector leptoquarks coupling to the first generation, using data from low energy experiments as well as from high energy accelerators. Similarly to the case of scalar leptoquarks, we find that the strongest indirect bounds arise from atomic parity violation and universality in leptonic 1~ decays. These bounds are considerably stronger than the first direct bounds of the DESY ep collider HERA, restricting vector leptoquarks that couple with electromagnetic strength to right-handed quarks to lie above 430 GeV or 460 GeV, and leptoquarks that couple with electromagnetic strength to lefthanded quarks to lie above 1.3 TeV, 1.2 TeV, and 1.5 TeV for the SU(2)w singlet, doublet, and triplet, respectively.PACS number(s): 14.80. -j, 12.60.-i

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Measurement of charge asymmetry in hadronic Z decays

Cited by 40 publications

References 26 publications

Comprehensive study of leptoquark bounds

Comprehensive study of leptoquark bounds

Method for flavor tagging in neutralBmeson decays

Bounds on vector leptoquarks

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