Direct Observation of Longitudinally Polarised $W^{\pm}$ Bosons

W%2BW%22&type=SU">E+E-->W+W, Particle Physics - Experiment, Beam (structure) -->
Popis: The three different helicity states of W± bosons, produced in the reaction e+e−→W+W−→ℓνqq̄ are studied using leptonic and hadronic W decays at √s = 183 GeV and 189 GeV. The W polarisation is also measured as a function of the scattering angle between the W- and the direction of the e- beam. The analysis demonstrates that W bosons are produced with all three helicities, the longitudinal and the two transverse states. Combining the results from the two center-of-mass energies and with leptonic and hadronic W decays, the fraction of longitudinally polarised W± bosons is measured to be 0.261 ± 0.051 (stat.) ± 0.016 (syst.) in agreement with the expectation from the Standard Model.
Facultad de Ciencias Exactas
Popis souboru: application/pdf; STAMPA
Jazyk: English
ISSN: 0370-2693
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60b0e3aa683da26044e5a7d719d100f1
http://hal.in2p3.fr/in2p3-00009682
Rights: OPEN
Přírůstkové číslo: edsair.doi.dedup.....60b0e3aa683da26044e5a7d719d100f1
Autor: Acciarri, M, Achard, P, Adriani, O, Aguilar-Benitez, M, Alcaraz, J, Alemanni, G, Allaby, J, Aloisio, A, Alviggi, MG, Ambrosi, G, Anderhub, H, Andreev, VP, Angelescu, T, Anselmo, F, Arefiev, A, Azemoon, T, Aziz, T, Bagnaia, P, Baksay, L, Balandras, A, Ball, RC, Banerjee, S, Barczyk, A, Barillere, R, Barone, L, Bartalini, P, Basile, M, Battiston, R, Bay, A, Becattini, F, Becker, U, Behner, F, Bellucci, L, Berdugo, J, Berges, P, Bertucci, B, Betev, BL, Bhattacharya, S, Biasini, M, Biland, A, Blaising, JJ, Blyth, SC, Bobbink, GJ, Bohm, A, Boldizsar, L, Borgia, B, Bourilkov, D, Bourquin, M, Braccini, S, Branson, JG, Brigljevic, V, Brochu, F, Buffini, A, Buijs, A, Burger, JD, Burger, WJ, Button, A, Cai, XD, Campanelli, M, Capell, M, Romeo, GC, Carlino, G, Cartacci, AM, Casaus, J, Castellini, G, Cavallari, F, Cavallo, N, Cecchi, C, Cerrada, M, Cesaroni, F, Chamizo, M, Chang, YH, Chaturvedi, UK, Chemarin, H, Chen, A, Chen, G, Chen, GM, Chen, HF, Chen, HS, Chiefari, G, Cifarelli, L, Cindolo, F, Civinini, C, Clare, I, Clare, R, Coignet, G, Colijn, AP, Colino, N, Costantini, S, Cotorobai, F, Cozzoni, B, de la Cruz, B, Csilling, A, Cucciarelli, S, Dai, TS, van Dalen, JA, D'Alessandro, R, de Asmundis, R, Deglon, P, Degre, A, Deiters, K, della Volpe, D, Denes, P, DeNotaristefani, F, De Salvo, A, Diemoz, M, van Dierendonck, D, Di Lodovico, F, Dionisi, C, Dittmar, M, Dominguez, A, Doria, A, Dova, MT, Duchesneau, D, Dufournaud, D, Duinker, P, Duran, I, El Mamouni, H, Engler, A, Eppling, FJ, Erne, FC, Extermann, P, Fabre, M, Faccini, R, Falagan, MA, Falciano, S, Favara, A, Fay, J, Fedin, O, Felcini, M, Ferguson, T, Ferroni, F, Fesefeldt, H, Fiandrini, E, Field, JH, Filthaut, F, Fisher, PH, Fisk, I, Forconi, G, Fredj, L, Freudenreich, K, Furetta, C, Galaktionov, Y, Ganguli, SN, Garcia-Abia, P, Gataullin, M, Gau, SS, Gentile, S, Gheordanescu, N, Giagu, S, Gong, ZF, Grenier, G, Grimm, O, Gruenewald, MW, Guida, M, van Gulik, R, Gupta, VK, Gurtu, A, Gutay, LJ, Haas, D, Hasan, A, Hatzifotiadou, D, Hebbecker, T, Herve, A, Hidas, P, Hirschfelder, J, Hofer, H, Holzner, G, Hoorani, H, Hou, SR, Iashvili, I, Jin, BN, Jones, LW, de Jong, P, Josa-Mutuberria, I, Khan, RA, Kaur, M, Kienzle-Focacci, MN, Kim, D, Kim, DH, Kim, JK, Kim, SC, Kirkby, J, Kiss, D, Kittel, W, Klimentov, A, Konig, AC, Kopp, A, Koutsenko, V, Kraber, M, Kraemer, RW, Krenz, W, Kruger, A, Kunin, A, de Guevara, PL, Laktineh, I, Landi, G, Lassila-Perini, K, Lebeau, M, Lebedev, A, Lebrun, P, Lecomte, P, Lecoq, P, Le Coultre, P, Lee, HJ, Le Goff, JM, Leiste, R, Leonardi, E, Levtchenko, P, Li, C, Likhoded, S, Lin, CH, Lin, WT, Linde, FL, Lista, L, Liu, ZA, Lohmann, W, Longo, E, Lu, YS, Lubelsmeyer, K, Luci, C, Luckey, D, Lugnier, L, Luminari, L, Lustermann, W, Ma, WG, Maity, M, Malgeri, L, Malinin, A, Mana, C, Mangeol, D, Marchesini, P, Marian, G, Martin, JP, Marzano, F, Massaro, GGG, Mazumdar, K, McNeil, RR, Mele, S, Merola, L, Meschini, M, Metzger, WJ, von der Mey, M, Mihul, A, Milcent, H, Mirabelli, G, Mnich, J, Mohanty, GB, Molnar, P, Monteleoni, B, Moulik, T, Muanza, GS, Muheim, F, Muijs, AJM, Musy, M, Napolitano, M, Nessi-Tedaldi, F, Newman, H, Niessen, T, Nisati, A, Nowak, H, Oh, YD, Organtini, G, Oulianov, A, Palomares, C, Pandoulas, D, Paoletti, S, Paolucci, P, Paramatti, R, Park, HK, Park, IH, Pascale, G, Passaleva, G, Patricelli, S, Paul, T, Pauluzzi, M, Paus, C, Pauss, F, Pedace, M, Pensotti, S, Perret-Gallix, D, Petersen, B, Piccolo, D, Pierella, F, Pieri, M, Piroue, PA, Pistolesi, E, Plyaskin, V, Pohl, M, Pojidaev, V, Postema, H, Pothier, J, Produit, N, Prokofiev, DO, Prokofiev, D, Quartieri, J, Rahal-Callot, G, Rahaman, MA, Raics, P, Raja, N, Ramelli, R, Rancoita, PG, Raspereza, A, Raven, G, Razis, P, Ren, D, Rescigno, M, Reucroft, S, van Rhee, T, Riemann, S, Riles, K, Robohm, A, Rodin, J, Roe, BP, Romero, L, Rosca, A, Rosier-Lees, S, Rubio, JA, Ruschmeier, D, Rykaczewski, H, Saremi, S, Sarkar, S, Salicio, J, Sanchez, E, Sanders, MP, Sarakinos, ME, Schafer, C, Schegelsky, V, Schmidt-Kaerst, S, Schmitz, D, Schopper, H, Schotanus, DJ, Schwering, G, Sciacca, C, Sciarrino, D, Seganti, A, Servoli, L, Shevchenko, S, Shivarov, N, Shoutko, V, Shumilov, E, Shvorob, A, Siedenburg, T, Son, D, Smith, B, Spillantini, P, Steuer, M, Stickland, DP, Stone, A, Stone, H, Stoyanov, B, Straessner, A, Sudhakar, K, Sultanov, G, Sun, LZ, Suter, H, Swain, JD, Szillasi, Z, Sztaricskai, T, Tang, XW, Tauscher, L, Taylor, L, Timmermans, C, Ting, SCC, Ting, SM, Tonwar, SC, Toth, J, Tully, C, Tung, KL, Uchida, Y, Ulbricht, J, Valente, E, Vesztergombi, G, Vetlitsky, I, Vicinanza, D, Viertel, G, Villa, S, Vivargent, M, Vlachos, S, Vodopianov, I, Vogel, H, Vogt, H, Vorobiev, I, Vorobyov, AA, Vorvolakos, A, Wadhwa, M, Wallraff, W, Wang, M, Wang, XL, Wang, ZM, Weber, A, Weber, M, Wienemann, P, Wilkens, H, Wu, SX, Wynhoff, S, Xie, L, Xu, ZZ, Yang, BZ, Yang, CG, Yang, HJ, Yang, M, Ye, JB, Yeh, SC, Zalite, A, Zalite, Y, Zhang, ZP, Zhu, GY, Zhu, RY, Zichichi, A, Zilizi, G, Zoller, M, Collaboration, L
Přispěvatelé: Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), L3, Achard, Pablo, Ambrosi, Giovanni, Bourquin, Maurice, Braccini, Saverio, Chamizo Llatas, Maria, Deglon, Patrick, Delmeire, Evelyne, Extermann, Pierre, Field, John, Kienzle, Maria-Novella, Muheim, Franz, Pohl, Martin, Produit, Nicolas, Sciarrino, Deborah, L3 (IHEF, IoP, FNWI), Acciarri, M., Achard, P., Adriani, O., Aguilar Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, Alberto, Alviggi, Mariagrazia, Ambrosi, G., Anderhub, H., Andreev, V. P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., Balandras, A., Ball, R. C., Banerjee, S., Barczyk, A., Barillere, R., Barone, L., Bartalini, P., Basile, M., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bellucci, L., Berdugo, J., Berges, P., Bertucci, B., Betev, B. L., Bhattacharya, S., Biasini, M., Biland, A., Blaising, J. J., Blyth, S. C., Bobbink, G. J., Bohm, A., Boldizsar, L., Borgia, B., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J. G., V, B., Brochu, F., Buffini, A., Buijs, A., Burger, J. D., Burger, W. J., Button, A., Cai, X. D., Campanelli, M., Capell, M., Romeo, G. C., Carlino, G., Cartacci, A. M., Casaus, J., Castellini, G., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Cesaroni, F., Chamizo, M., Chang, Y. H., Chaturvedi, U. K., Chemarin, H., Chen, A., Chen, G., Chen, G. M., Chen, H. F., Chen, H. S., Chiefari, Giovanni, Cifarelli, L., Cindolo, F., Civinini, C., I, C., Clare, R., Coignet, G., Colijn, A. P., Colino, N., Costantini, S., Cotorobai, F., Cozzoni, B., B. d., La, Csilling, A., Cucciarelli, S., Dai, T. S., Van, J. A., D'Alessandro, R., Asmundis, R. d., Deglon, P., Degre, A., Deiters, K., DELLA VOLPE, Domenico, Denes, P., Denotaristefani, F., Salvo, A. D., Diemoz, M., Dierendonck, D. v., Lodovico, F. D., Dionisi, C., Dittmar, M., Dominguez, A., Doria, A., Dova, M. T., Duchesneau, D., Dufournaud, D., Duinker, P., I, D., Mamouni, H. E., Engler, A., Eppling, F. J., Erne, F. C., Extermann, P., Fabre, M., Faccini, R., Falagan, M. A., Falciano, S., Favara, A., Fay, J., Fedin, O., Felcini, M., Ferguson, T., Ferroni, F., Fesefeldt, H., Fiandrini, E., Field, J. H., Filthaut, F., Fisher, P. H., I, F., Forconi, G., Fredj, L., Freudenreich, K., Furetta, C., Galaktionov, Y., Ganguli, S. N., Garcia Abia, P., Gataullin, M., Gau, S. S., Gentile, S., Gheordanescu, N., Giagu, S., Gong, Z. F., Grenier, G., Grimm, O., Gruenewald, M. W., Guida, M., Gulik, R. v., Gupta, V. K., Gurtu, A., Gutay, L. J., Haas, D., Hasan, A., Hatzifotiadou, D., Hebbecker, T., Herve, A., Hidas, P., Hirschfelder, J., Hofer, H., Holzner, G., Hoorani, H., Sr, H., I, I., Jin, B. N., Jones, L. W., Jong, P. d., I, J., Khan, R. A., Kaur, M., Kienzle Focacci, M. N., Kim, D., Kim, D. H., Kim, J. K., Kim, S. C., Kirkby, J., Kiss, D., Kittel, W., Klimentov, A., Konig, A. C., Kopp, A., V, K., Kraber, M., Kraemer, R. W., Krenz, W., Kruger, A., Kunin, A., P. L., De, I, L., Landi, G., Lassila Perini, K., Lebeau, M., Lebedev, A., Lebrun, P., Lecomte, P., Lecoq, P., Coultre, P. L., Lee, H. J., J. M., Le, Leiste, R., Leonardi, E., Levtchenko, P., Li, C., Likhoded, S., Lin, C. H., Lin, W. T., Linde, F. L., Lista, L., Liu, Z. A., Lohmann, W., Longo, E., Y. S., Lu, Lubelsmeyer, K., Luci, C., Luckey, D., Lugnier, L., Luminari, L., Lustermann, W., W. G., Ma, Maity, M., Malgeri, L., Malinin, A., Mana, C., Mangeol, D., Marchesini, P., Marian, G., Martin, J. P., Marzano, F., G. G. G., Mazumdar, K., Mcneil, R. R., Mele, S., Merola, Leonardo, Meschini, M., Metzger, W. J., Der, M. v., Mihul, A., Milcent, H., Mirabelli, G., Mnich, J., Mohanty, G. B., Molnar, P., Monteleoni, B., Moulik, T., Muanza, G. S., Muheim, F., A. J. M., Musy, M., Napolitano, Marco, Nessi Tedaldi, F., Newman, H., Niessen, T., Nisati, A., Nowak, H., Y. D., Oh, Organtini, G., Oulianov, A., Palomares, C., Pandoulas, D., Paoletti, S., Paolucci, P., Paramatti, R., Park, H. K., Park, I. H., Pascale, G., Passaleva, G., Patricelli, Sergio, Paul, T., Pauluzzi, M., Paus, C., Pauss, F., Pedace, M., Pensotti, S., Perret Gallix, D., Petersen, B., Piccolo, D., Pierella, F., Pieri, M., Piroue, P. A., Pistolesi, E., V, P., Pohl, M., Postema, H., Pothier, J., Produit, N., Prokofiev, D. O., Prokofiev, D., Quartieri, J., Rahal Callot, G., Rahaman, M. A., Raics, P., Raja, N., Ramelli, R., Rancoita, P. G., Raspereza, A., Raven, G., Razis, P., Ren, D., Rescigno, M., Reucroft, S., Rhee, T. v., Riemann, S., Riles, K., Robohm, A., Rodin, J., Roe, B. P., Romero, L., Rosca, A., Rosier Lees, S., Rubio, J. A., Ruschmeier, D., Rykaczewski, H., Saremi, S., Sarkar, S., Salicio, J., Sanchez, E., Sanders, M. P., Sarakinos, M. E., Schafer, C., V, S., Schmidt Kaerst, S., Schmitz, D., Schopper, H., Schotanus, D. J., Schwering, G., Sciacca, Crisostomo, Sciarrino, D., Seganti, A., Servoli, L., Shevchenko, S., Shivarov, N., Shumilov, E., Shvorob, A., Siedenburg, T., Son, D., Smith, B., Spillantini, P., Steuer, M., Stickland, D. P., Stone, A., Stone, H., Stoyanov, B., Straessner, A., Sudhakar, K., Sultanov, G., Sun, L. Z., Suter, H., Swain, J. D., Szillasi, Z., Sztaricskai, T., Tang, X. W., Tauscher, L., Taylor, L., Timmermans, C., S. C. C., Ting, S. M., Tonwar, S. C., Toth, J., Tully, C., Tung, K. L., Uchida, Y., Ulbricht, J., Valente, E., Vesztergombi, G., I, V., Vicinanza, D., Viertel, G., Villa, S., Vivargent, M., Vlachos, S., Vogel, H., Vogt, H., Vorobyov, A. A., Vorvolakos, A., Wadhwa, M., Wallraff, W., Wang, M., Wang, X. L., Wang, Z. M., Weber, A., Weber, M., Wienemann, P., Wilkens, H., S. X., Wu, Wynhoff, S., Xie, L., Z. Z., Xu, Yang, B. Z., Yang, C. G., Yang, H. J., Yang, M., J. B., Ye, Yeh, S. C., Zalite, A., Zalite, Y., Zhang, Z. P., Zhu, G. Y., Zhu, R. Y., Zichichi, A., Zilizi, G., Zoller, M.
Jazyk: angličtina
Rok vydání: 2000
Předmět:
Zdroj: Physics Letters B
Physics Letters B, Elsevier, 2000, 474, pp.194-204
Physics Letters. B, Vol. 474, No 1-2 (2000) pp. 194-204
Physics Letters B, 474, 194-204. Elsevier
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
ISSN: 0370-2693
Popis: The three different helicity states of W± bosons, produced in the reaction e+e−→W+W−→ℓνqq̄ are studied using leptonic and hadronic W decays at √s = 183 GeV and 189 GeV. The W polarisation is also measured as a function of the scattering angle between the W- and the direction of the e- beam. The analysis demonstrates that W bosons are produced with all three helicities, the longitudinal and the two transverse states. Combining the results from the two center-of-mass energies and with leptonic and hadronic W decays, the fraction of longitudinally polarised W± bosons is measured to be 0.261 ± 0.051 (stat.) ± 0.016 (syst.) in agreement with the expectation from the Standard Model.
Facultad de Ciencias Exactas
Databáze: OpenAIRE
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