학술논문

Measurement of the τ lepton polarization in Z boson decays in proton-proton collisions at s = 13 TeV
Document Type
Original Paper
Author
Hayrapetyan, A.Tumasyan, A.Adam, W.Andrejkovic, J. W.Bergauer, T.Chatterjee, S.Damanakis, K.Dragicevic, M.Escalante Del Valle, A.Hussain, P. S.Jeitler, M.Krammer, N.Liko, D.Mikulec, I.Schieck, J.Schöfbeck, R.Schwarz, D.Sonawane, M.Templ, S.Waltenberger, W.Wulz, C.-E.Darwish, M. R.Janssen, T.Van Mechelen, P.Bols, E. S.D’Hondt, J.Dansana, S.De Moor, A.Delcourt, M.El Faham, H.Lowette, S.Makarenko, I.Müller, D.Sahasransu, A. R.Tavernier, S.Tytgat, M.Van Putte, S.Vannerom, D.Clerbaux, B.De Lentdecker, G.Favart, L.Hohov, D.Jaramillo, J.Khalilzadeh, A.Lee, K.Mahdavikhorrami, M.Malara, A.Paredes, S.Pétré, L.Postiau, N.Thomas, L.Vanden Bemden, M.Vander Velde, C.Vanlaer, P.De Coen, M.Dobur, D.Hong, Y.Knolle, J.Lambrecht, L.Mestdach, G.Rendón, C.Samalan, A.Skovpen, K.Van Den Bossche, N.Wezenbeek, L.Benecke, A.Bruno, G.Caputo, C.Delaere, C.Donertas, I. S.Giammanco, A.Jaffel, K.Jain, Sa.Lemaitre, V.Lidrych, J.Mastrapasqua, P.Mondal, K.Tran, T. T.Wertz, S.Alves, G. A.Coelho, E.Hensel, C.Menezes De Oliveira, T.Moraes, A.Rebello Teles, P.Soeiro, M.Aldá Júnior, W. L.Alves Gallo Pereira, M.Barroso Ferreira Filho, M.Brandao Malbouisson, H.Carvalho, W.Chinellato, J.Da Costa, E. M.Da Silveira, G. G.De Jesus Damiao, D.Fonseca De Souza, S.Martins, J.Mora Herrera, C.Mota Amarilo, K.Mundim, L.Nogima, H.Santoro, A.Silva Do Amaral, S. M.Sznajder, A.Thiel, M.Vilela Pereira, A.Bernardes, C. A.Calligaris, L.Fernandez Perez Tomei, T. R.Gregores, E. M.Mercadante, P. G.Novaes, S. F.Orzari, B.Padula, Sandra S.Aleksandrov, A.Antchev, G.Hadjiiska, R.Iaydjiev, P.Misheva, M.Shopova, M.Sultanov, G.Dimitrov, A.Ivanov, T.Litov, L.Pavlov, B.Petkov, P.Petrov, A.Shumka, E.Keshri, S.Thakur, S.Cheng, T.Guo, Q.Javaid, T.Mittal, M.Yuan, L.Bauer, G.Hu, Z.Yi, K.Chen, G. M.Chen, H. S.Chen, M.Iemmi, F.Jiang, C. H.Kapoor, A.Liao, H.Liu, Z.-A.Monti, F.Sharma, R.Song, J. N.Tao, J.Wang, C.Wang, J.Wang, Z.Zhang, H.Agapitos, A.Ban, Y.Levin, A.Li, C.Li, Q.Lyu, X.Mao, Y.Qian, S. J.Sun, X.Wang, D.Yang, H.Zhou, C.You, Z.Lu, N.Gao, X.Leggat, D.Okawa, H.Zhang, Y.Lin, Z.Lu, C.Xiao, M.Avila, C.Barbosa Trujillo, D. A.Cabrera, A.Florez, C.Fraga, J.Reyes Vega, J. A.Mejia Guisao, J.Ramirez, F.Rodriguez, M.Ruiz Alvarez, J. D.Giljanovic, D.Godinovic, N.Lelas, D.Sculac, A.Kovac, M.Sculac, T.Bargassa, P.Brigljevic, V.Chitroda, B. K.Ferencek, D.Mishra, S.Starodumov, A.Susa, T.Attikis, A.Christoforou, K.Konstantinou, S.Mousa, J.Nicolaou, C.Ptochos, F.Razis, P. A.Rykaczewski, H.Saka, H.Stepennov, A.Finger, M.Finger, Jr., M.Kveton, A.Ayala, E.Carrera Jarrin, E.Assran, Y.Elgammal, S.Lotfy, A.Mahmoud, M. A.Dewanjee, R. K.Ehataht, K.Kadastik, M.Lange, T.Nandan, S.Nielsen, C.Pata, J.Raidal, M.Tani, L.Veelken, C.Kirschenmann, H.Osterberg, K.Voutilainen, M.Bharthuar, S.Brücken, E.Garcia, F.Havukainen, J.Kallonen, K. T. S.Kim, M. S.Kinnunen, R.Lampén, T.Lassila-Perini, K.Lehti, S.Lindén, T.Lotti, M.Martikainen, L.Myllymäki, M.Rantanen, M. m.Siikonen, H.Tuominen, E.Tuominiemi, J.Luukka, P.Petrow, H.Tuuva, T.Besancon, M.Couderc, F.Dejardin, M.Denegri, D.Faure, J. L.Ferri, F.Ganjour, S.Gras, P.Hamel de Monchenault, G.Lohezic, V.Malcles, J.Rander, J.Rosowsky, A.Sahin, M. Ö.Savoy-Navarro, A.Simkina, P.Titov, M.Baldenegro Barrera, C.Beaudette, F.Buchot Perraguin, A.Busson, P.Cappati, A.Charlot, C.Damas, F.Davignon, O.De Wit, A.Falmagne, G.Fontana Santos Alves, B. A.Ghosh, S.Gilbert, A.Granier de Cassagnac, R.Hakimi, A.Harikrishnan, B.Kalipoliti, L.Liu, G.Motta, J.Nguyen, M.Ochando, C.Portales, L.Salerno, R.Sarkar, U.Sauvan, J. B.Sirois, Y.Tarabini, A.Vernazza, E.Zabi, A.Zghiche, A.Agram, J.-L.Andrea, J.Apparu, D.Bloch, D.Brom, J.-M.Chabert, E. C.Collard, C.Falke, S.Goerlach, U.Grimault, C.Haeberle, R.Le Bihan, A.-C.Sessini, M. A.Van Hove, P.Beauceron, S.Blancon, B.Boudoul, G.Chanon, N.Choi, J.Contardo, D.Depasse, P.Dozen, C.El Mamouni, H.Fay, J.Gascon, S.Gouzevitch, M.Greenberg, C.Grenier, G.Ille, B.Laktineh, I. B.Lethuillier, M.Mirabito, L.Perries, S.Vander Donckt, M.Verdier, P.Xiao, J.Chokheli, D.Lomidze, I.Tsamalaidze, Z.Botta, V.Feld, L.Klein, K.Lipinski, M.Meuser, D.Pauls, A.Röwert, N.Teroerde, M.Diekmann, S.Dodonova, A.Eich, N.Eliseev, D.Engelke, F.Erdmann, M.Fackeldey, P.Fischer, B.Hebbeker, T.Hoepfner, K.Ivone, F.Jung, A.Lee, M. y.Mastrolorenzo, L.Merschmeyer, M.Meyer, A.Mukherjee, S.Noll, D.Novak, A.Nowotny, F.Pozdnyakov, A.Rath, Y.Redjeb, W.Rehm, F.Reithler, H.Sarkisovi, V.Schmidt, A.Schuler, S. C.Sharma, A.Stein, A.Torres Da Silva De Araujo, F.Vigilante, L.Wiedenbeck, S.Zaleski, S.Dziwok, C.Flügge, G.Haj Ahmad, W.Kress, T.Nowack, A.Pooth, O.Stahl, A.Ziemons, T.Zotz, A.Aarup Petersen, H.Aldaya Martin, M.Alimena, J.Amoroso, S.An, Y.Baxter, S.Bayatmakou, M.Becerril Gonzalez, H.Behnke, O.Belvedere, A.Bhattacharya, S.Blekman, F.Borras, K.Brunner, D.Campbell, A.Cardini, A.Cheng, C.Colombina, F.Consuegra Rodríguez, S.Correia Silva, G.De Silva, M.Eckerlin, G.Eckstein, D.Estevez Banos, L. I.Filatov, O.Gallo, E.Geiser, A.Giraldi, A.Greau, G.Guglielmi, V.Guthoff, M.Hinzmann, A.Jafari, A.Jeppe, L.Jomhari, N. Z.Kaech, B.Kasemann, M.Kaveh, H.Kleinwort, C.Kogler, R.Komm, M.Krücker, D.Lange, W.Leyva Pernia, D.Lipka, K.Lohmann, W.Mankel, R.Melzer-Pellmann, I.-A.Mendizabal Morentin, M.Metwally, J.Meyer, A. B.Milella, G.Mussgiller, A.Nürnberg, A.Otarid, Y.Pérez Adán, D.Ranken, E.Raspereza, A.Ribeiro Lopes, B.Rübenach, J.Saggio, A.Scham, M.Scheurer, V.Schnake, S.Schütze, P.Schwanenberger, C.Shchedrolosiev, M.Sosa Ricardo, R. E.Sreelatha Pramod, L. P.Stafford, D.Vazzoler, F.Ventura Barroso, A.Walsh, R.Wang, Q.Wen, Y.Wichmann, K.Wiens, L.Wissing, C.Wuchterl, S.Yang, Y.Zimermmane Castro Santos, A.Albrecht, A.Albrecht, S.Antonello, M.Bein, S.Benato, L.Bonanomi, M.Connor, P.Eich, M.El Morabit, K.Fischer, Y.Fröhlich, A.Garbers, C.Garutti, E.Grohsjean, A.Hajheidari, M.Haller, J.Jabusch, H. R.Kasieczka, G.Keicher, P.Klanner, R.Korcari, W.Kramer, T.Kutzner, V.Labe, F.Lange, J.Lobanov, A.Matthies, C.Mehta, A.Moureaux, L.Mrowietz, M.Nigamova, A.Nissan, Y.Paasch, A.Pena Rodriguez, K. J.Quadfasel, T.Raciti, B.Rieger, M.Savoiu, D.Schindler, J.Schleper, P.Schröder, M.Schwandt, J.Sommerhalder, M.Stadie, H.Steinbrück, G.Tews, A.Wolf, M.Brommer, S.Burkart, M.Butz, E.Chwalek, T.Dierlamm, A.Droll, A.Faltermann, N.Giffels, M.Gottmann, A.Hartmann, F.Horzela, M.Husemann, U.Klute, M.Koppenhöfer, R.Link, M.Lintuluoto, A.Maier, S.Mitra, S.Mormile, M.Müller, Th.Neukum, M.Oh, M.Quast, G.Rabbertz, K.Shvetsov, I.Simonis, H. J.Trevisani, N.Ulrich, R.van der Linden, J.Von Cube, R. F.Wassmer, M.Wieland, S.Wittig, F.Wolf, R.Wunsch, S.Zuo, X.Anagnostou, G.Assiouras, P.Daskalakis, G.Kyriakis, A.Papadopoulos, A.Stakia, A.Karasavvas, D.Kontaxakis, P.Melachroinos, G.Panagiotou, A.Papavergou, I.Paraskevas, I.Saoulidou, N.Theofilatos, K.Tziaferi, E.Vellidis, K.Zisopoulos, I.Bakas, G.Chatzistavrou, T.Karapostoli, G.Kousouris, K.Papakrivopoulos, I.Siamarkou, E.Tsipolitis, G.Zacharopoulou, A.Adamidis, K.Bestintzanos, I.Evangelou, I.Foudas, C.Gianneios, P.Kamtsikis, C.Katsoulis, P.Kokkas, P.Kosmoglou Kioseoglou, P. G.Manthos, N.Papadopoulos, I.Strologas, J.Csanád, M.Farkas, K.Gadallah, M. M. A.Kadlecsik, Á.Major, P.Mandal, K.Pásztor, G.Rádl, A. J.Veres, G. I.Bartók, M.Hajdu, C.Horvath, D.Sikler, F.Veszpremi, V.Raics, P.Ujvari, B.Zilizi, G.Bencze, G.Czellar, S.Karancsi, J.Molnar, J.Szillasi, Z.Csorgo, T.Nemes, F.Novak, T.Babbar, J.Bansal, S.Beri, S. B.Bhatnagar, V.Chaudhary, G.Chauhan, S.Dhingra, N.Gupta, R.Kaur, A.Kaur, A.Kaur, H.Kaur, M.Kumar, S.Kumari, P.Meena, M.Sandeep, K.Sheokand, T.Singh, J. B.Singla, A.Ahmed, A.Bhardwaj, A.Chhetri, A.Choudhary, B. C.Kumar, A.Naimuddin, M.Ranjan, K.Saumya, S.Baradia, S.Barman, S.Bhattacharya, S.Bhowmik, D.Dutta, S.Dutta, S.Gomber, B.Palit, P.Saha, G.Sahu, B.Sarkar, S.Ameen, M. M.Behera, P. K.Behera, S. C.Chatterjee, S.Jana, P.Kalbhor, P.Komaragiri, J. R.Kumar, D.Panwar, L.Pradhan, R.Pujahari, P. R.Saha, N. R.Sharma, A.Sikdar, A. K.Verma, S.Aziz, T.Das, I.Dugad, S.Kumar, M.Mohanty, G. B.Suryadevara, P.Bala, A.Banerjee, S.Chatterjee, R. M.Guchait, M.Karmakar, S.Kumar, S.Majumder, G.Mazumdar, K.Mukherjee, S.Thachayath, A.Bahinipati, S.Das, A. K.Kar, C.Maity, D.Mal, P.Mishra, T.Muraleedharan Nair Bindhu, V. K.Naskar, K.Nayak, A.Sadangi, P.Saha, P.Swain, S. K.Varghese, S.Vats, D.Alpana, A.Dube, S.Kansal, B.Laha, A.Rastogi, A.Sharma, S.Bakhshiansohi, H.Khazaie, E.Zeinali, M.Chenarani, S.Etesami, S. M.Khakzad, M.Mohammadi Najafabadi, M.Grunewald, M.Abbrescia, M.Aly, R.Colaleo, A.Creanza, D.D‘ Anzi, B.De Filippis, N.De Palma, M.Di Florio, A.Elmetenawee, W.Fiore, L.Iaselli, G.Maggi, G.Maggi, M.Margjeka, I.Mastrapasqua, V.My, S.Nuzzo, S.Pellecchia, A.Pompili, A.Pugliese, G.Radogna, R.Ramirez-Sanchez, G.Ramos, D.Ranieri, A.Silvestris, L.Simone, F. M.Sözbilir, Ü.Stamerra, A.Venditti, R.Verwilligen, P.Zaza, A.Abbiendi, G.Battilana, C.Bonacorsi, D.Borgonovi, L.Campanini, R.Capiluppi, P.Cavallo, F. R.Cuffiani, M.Dallavalle, G. M.Diotalevi, T.Fabbri, F.Fanfani, A.Fasanella, D.Giacomelli, P.Giommi, L.Grandi, C.Guiducci, L.Lo Meo, S.Lunerti, L.Marcellini, S.Masetti, G.Navarria, F. L.Perrotta, A.Primavera, F.Rossi, A. M.Rovelli, T.Siroli, G. P.Costa, S.Di Mattia, A.Potenza, R.Tricomi, A.Tuve, C.Barbagli, G.Bardelli, G.Camaiani, B.Cassese, A.Ceccarelli, R.Ciulli, V.Civinini, C.D’Alessandro, R.Focardi, E.Latino, G.Lenzi, P.Lizzo, M.Meschini, M.Paoletti, S.Papanastassiou, A.Sguazzoni, G.Viliani, L.Benussi, L.Bianco, S.Meola, S.Piccolo, D.Chatagnon, P.Ferro, F.Robutti, E.Tosi, S.Benaglia, A.Boldrini, G.Brivio, F.Cetorelli, F.De Guio, F.Dinardo, M. E.Dini, P.Gennai, S.Ghezzi, A.Govoni, P.Guzzi, L.Lucchini, M. T.Malberti, M.Malvezzi, S.Massironi, A.Menasce, D.Moroni, L.Paganoni, M.Pedrini, D.Pinolini, B. S.Ragazzi, S.Redaelli, N.Tabarelli de Fatis, T.Zuolo, D.Buontempo, S.Cagnotta, A.Carnevali, F.Cavallo, N.De Iorio, A.Fabozzi, F.Iorio, A. O. M.Lista, L.Paolucci, P.Rossi, B.Sciacca, C.Ardino, R.Azzi, P.Bacchetta, N.Bisello, D.Bortignon, P.Bragagnolo, A.Carlin, R.Checchia, P.Dorigo, T.Gasparini, F.Grosso, G.Layer, L.Lusiani, E.Margoni, M.Meneguzzo, A. T.Migliorini, M.Pazzini, J.Ronchese, P.Rossin, R.Sgaravatto, M.Simonetto, F.Strong, G.Tosi, M.Triossi, A.Ventura, S.Yarar, H.Zanetti, M.Zotto, P.Zucchetta, A.Zumerle, G.Abu Zeid, S.Aimè, C.Braghieri, A.Calzaferri, S.Fiorina, D.Montagna, P.Re, V.Riccardi, C.Salvini, P.Vai, I.Vitulo, P.Ajmal, S.Asenov, P.Bilei, G. M.Ciangottini, D.Fanò, L.Magherini, M.Mantovani, G.Mariani, V.Menichelli, M.Moscatelli, F.Piccinelli, A.Presilla, M.Rossi, A.Santocchia, A.Spiga, D.Tedeschi, T.Azzurri, P.Bagliesi, G.Bhattacharya, R.Bianchini, L.Boccali, T.Bossini, E.Bruschini, D.Castaldi, R.Ciocci, M. A.Cipriani, M.D’Amante, V.Dell’Orso, R.Donato, S.Giassi, A.Ligabue, F.Matos Figueiredo, D.Messineo, A.Musich, M.Palla, F.Parolia, S.Rizzi, A.Rolandi, G.Roy Chowdhury, S.Sarkar, T.Scribano, A.Spagnolo, P.Tenchini, R.Tonelli, G.Turini, N.Venturi, A.Verdini, P. G.Barria, P.Campana, M.Cavallari, F.Cunqueiro Mendez, L.Del Re, D.Di Marco, E.Diemoz, M.Errico, F.Longo, E.Meridiani, P.Mijuskovic, J.Organtini, G.Pandolfi, F.Paramatti, R.Quaranta, C.Rahatlou, S.Rovelli, C.Santanastasio, F.Soffi, L.Tramontano, R.Amapane, N.Arcidiacono, R.Argiro, S.Arneodo, M.Bartosik, N.Bellan, R.Bellora, A.Biino, C.Cartiglia, N.Costa, M.Covarelli, R.Demaria, N.Finco, L.Grippo, M.Kiani, B.Legger, F.Luongo, F.Mariotti, C.Maselli, S.Mecca, A.Migliore, E.Monteno, M.Mulargia, R.Obertino, M. M.Ortona, G.Pacher, L.Pastrone, N.Pelliccioni, M.Ruspa, M.Siviero, F.Sola, V.Solano, A.Soldi, D.Staiano, A.Tarricone, C.Tornago, M.Trocino, D.Umoret, G.Vlasov, E.Belforte, S.Candelise, V.Casarsa, M.Cossutti, F.De Leo, K.Della Ricca, G.Dogra, S.Hong, J.Huh, C.Kim, B.Kim, D. H.Kim, J.Lee, H.Lee, S. W.Moon, C. S.Oh, Y. D.Pak, S. I.Ryu, M. S.Sekmen, S.Yang, Y. C.Bak, G.Gwak, P.Kim, H.Moon, D. H.Asilar, E.Kim, D.Kim, T. J.Merlin, J. A.Park, J.Choi, S.Han, S.Hong, B.Lee, K.Lee, K. S.Park, J.Park, S. K.Yoo, J.Goh, J.Kim, H. S.Kim, Y.Lee, S.Almond, J.Bhyun, J. H.Choi, J.Jeon, S.Jun, W.Kim, J.Kim, J. S.Ko, S.Kwon, H.Lee, H.Lee, J.Lee, J.Lee, S.Oh, B. H.Oh, S. B.Seo, H.Yang, U. K.Yoon, I.Jang, W.Kang, D. Y.Kang, Y.Kim, S.Ko, B.Lee, J. S. H.Lee, Y.Park, I. C.Roh, Y.Watson, I. J.Yang, S.Ha, S.Yoo, H. D.Choi, M.Kim, M. R.Lee, H.Lee, Y.Yu, I.Beyrouthy, T.Maghrbi, Y.Dreimanis, K.Gaile, A.Pikurs, G.Potrebko, A.Seidel, M.Veckalns, V.Strautnieks, N. R.Ambrozas, M.Juodagalvis, A.Rinkevicius, A.Tamulaitis, G.Bin Norjoharuddeen, N.Yusuff, I.Zolkapli, Z.Benitez, J. F.Castaneda Hernandez, A.Encinas Acosta, H. A.Gallegos Maríñez, L. G.León Coello, M.Murillo Quijada, J. A.Sehrawat, A.Valencia Palomo, L.Ayala, G.Castilla-Valdez, H.De La Cruz-Burelo, E.Heredia-De La Cruz, I.Lopez-Fernandez, R.Mondragon Herrera, C. A.Sánchez Hernández, A.Oropeza Barrera, C.Ramírez García, M.Bautista, I.Pedraza, I.Salazar Ibarguen, H. A.Uribe Estrada, C.Bubanja, I.Raicevic, N.Butler, P. 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S.Zarubin, A.Zhizhin, I.Zhokin, A.
Source
Journal of High Energy Physics. 2024(1)
Subject
Hadron-Hadron Scattering
Tau Physics
Language
English
ISSN
1029-8479
Abstract
Abstract: The polarization of τ leptons is measured using leptonic and hadronic τ lepton decays in Z → τ+τ events in proton-proton collisions at sPτZ−PτZθWeffθWeff = 13 TeV recorded by CMS at the CERN LHC with an integrated luminosity of 36.3 fb−1. The measured τ lepton polarization at the Z boson mass pole is sPτZ−PτZθWeffθWeff = −0.144 ± 0.006 (stat) ± 0.014 (syst) = −0.144 ± 0.015, in good agreement with the measurement of the τ lepton asymmetry parameter of Aτ = 0.1439 ± 0.0043 = sPτZ−PτZθWeffθWeff at LEP. The τ lepton polarization depends on the ratio of the vector to axial-vector couplings of the τ leptons in the neutral current expression, and thus on the effective weak mixing angle sin2sPτZ−PτZθWeffθWeff, independently of the Z boson production mechanism. The obtained value sin2sPτZ−PτZθWeffθWeff = 0.2319 ± 0.0008(stat) ± 0.0018(syst) = 0.2319 ± 0.0019 is in good agreement with measurements at e+e colliders.