Search for heavy neutral resonances decaying to tau lepton pairs in proton-proton collisions at √s=13 TeV

Search for heavy neutral resonances decaying to tau lepton pairs in proton-proton collisions at (Formula presented)
  • Hayrapetyan, A.
  • Tumasyan, A.
  • Adam, W.
  • Andrejkovic, J.W.
  • Benato, L.
  • ... Kim, T.J.
  • 외 1,184명
Citations

WEB OF SCIENCE

0
Citations

SCOPUS

3

초록

A search for heavy neutral gauge bosons (Z ') decaying into a pair of tau leptons is performed in proton-proton collisions at root s =13 TeV at the CERN LHC. The data were collected with the CMS detector and correspond to an integrated luminosity of 138 fb(-1). The observations are found to be in agreement with the expectation from standard model processes. Limits at 95% confidence level are set on the product of the Z ' production cross section and its branching fraction to tau lepton pairs for a range of Z ' boson masses. For a narrow resonance in the sequential standard model scenario, a Z ' boson with a mass below 3.5 TeV is excluded. This is the most stringent limit to date from this type of search.

키워드

PHYSICS
제목
Search for heavy neutral resonances decaying to tau lepton pairs in proton-proton collisions at √s=13 TeV
제목 (타언어)
Search for heavy neutral resonances decaying to tau lepton pairs in proton-proton collisions at (Formula presented)
저자
Hayrapetyan, A.Tumasyan, A.Adam, W.Andrejkovic, J.W.Benato, L.Asilar, E.Choi, J.Kim, D.Kim, T.J.Merlin, J.A.Bergauer, T.Chatterjee, S.Damanakis, K.Dragicevic, M.Hussain, P.S.Jeitler, M.Krammer, N.Li, A.Liko, D.Mikulec, I.Schieck, J.Schöfbeck, R.Schwarz, D.Sonawane, M.Waltenberger, W.Wulz, C.-E.Janssen, T.Van Laer, T.Van Mechelen, P.Breugelmans, N.D’Hondt, J.Dansana, S.De Moor, A.Delcourt, M.Heyen, F.Lowette, S.Makarenko, I.Müller, D.Tavernier, S.Tytgat, M.Van Onsem, G.P.Van Putte, S.Vannerom, D.Bilin, B.Clerbaux, B.Das, A.K.De Bruyn, I.De Lentdecker, G.Evard, H.Favart, L.Gianneios, P.Jaramillo, J.Khalilzadeh, A.Khan, F.A.Lee, K.Mahdavikhorrami, M.Malara, A.Paredes, S.Shahzad, M.A.Thomas, L.Vanden Bemden, M.Vander Velde, C.Vanlaer, P.De Coen, M.Dobur, D.Gokbulut, G.Hong, Y.Knolle, J.Lambrecht, L.Marckx, D.Mota Amarilo, K.Skovpen, K.Van Den Bossche, N.van der Linden, J.Wezenbeek, L.Benecke, A.Bethani, A.Bruno, G.Caputo, C.De Favereau De Jeneret, J.Delaere, C.Donertas, I.S.Giammanco, A.Guzel, A.O.Jain, Sa.Lemaitre, V.Lidrych, J.Mastrapasqua, P.Tran, T.T.Alves, G.A.Coelho, E.Correia Silva, G.Hensel, C.Menezes De Oliveira, T.Mora Herrera, C.Rebello Teles, P.Soeiro, M.Vilela Pereira, A.Aldá, W.L.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.Gomes De Souza, R.Laux Kuhn, T.Macedo, M.Martins, J.Mundim, L.Nogima, H.Pinheiro, J.P.Santoro, A.Sznajder, A.Thiel, M.Bernardes, C.A.Calligaris, L.Tomei, T.R. Fernandez PerezGregores, E.M.Maietto Silverio, I.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.Litov, L.Pavlov, B.Petkov, P.Petrov, A.Shumka, E.Keshri, S.Laroze, D.Thakur, S.Cheng, T.Javaid, T.Yuan, L.Hu, Z.Liang, Z.Liu, J.Chen, G.M.Chen, H.S.Chen, M.Iemmi, F.Jiang, C.H.Kapoor, A.Liao, H.Liu, Z.-A.Sharma, R.Song, J.N.Tao, J.Wang, C.Wang, J.Wang, Z.Zhang, H.Zhao, J.Agapitos, A.Ban, Y.De Oliveira, A. Carvalho AntunesDeng, S.Guo, B.Jiang, C.Levin, A.Li, C.Li, Q.Mao, Y.Qian, S.Qian, S.J.Qin, X.Sun, X.Wang, D.Yang, H.Zhang, L.Zhao, Y.Zhou, C.Yang, S.You, Z.Jaffel, K.Lu, N.Bauer, G.Li, B.Yi, K.Zhang, J.Li, Y.Lin, Z.Lu, C.Xiao, M.Avila, C.Barbosa Trujillo, D.A.Cabrera, A.Florez, C.Fraga, J.Reyes Vega, J.A.Ramirez, F.Rendón, C.Rodriguez, M.Ruales Barbosa, A.A.Ruiz Alvarez, J.D.Giljanovic, D.Godinovic, N.Lelas, D.Sculac, A.Kovac, M.Petkovic, A.Sculac, T.Bargassa, P.Brigljevic, V.Chitroda, B.K.Ferencek, D.Jakovcic, K.Starodumov, A.Susa, T.Attikis, A.Christoforou, K.Hadjiagapiou, A.Leonidou, C.Mousa, J.Nicolaou, C.Paizanos, L.Ptochos, F.Razis, P.A.Rykaczewski, H.Saka, H.Stepennov, A.Finger, M.Finger, M.Kveton, A.Ayala, E.Carrera Jarrin, E.El-Mahdy, B.Khalil, S.Salama, E.Abdullah Al-Mashad, M.Mahmoud, M.A.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.Bin Norjoharuddeen, N.Brücken, E.Garcia, F.Inkaew, P.Kallonen, K.T.S.Lampén, T.Lassila-Perini, K.Lehti, S.Lindén, T.Myllymäki, M.Rantanen, M.m.Siikonen, H.Tuominiemi, J.Luukka, P.Petrow, H.Besancon, M.Couderc, F.Dejardin, M.Denegri, D.Faure, J.L.Ferri, F.Ganjour, S.Gras, P.de Monchenault, G. HamelKumar, M.Lohezic, V.Malcles, J.Orlandi, F.Portales, L.Rosowsky, A.Sahin, M.Ö.Savoy-Navarro, A.Simkina, P.Titov, M.Tornago, M.Beaudette, F.Boldrini, G.Busson, P.Cappati, A.Charlot, C.Chiusi, M.Cuisset, T.D.Damas, F.Davignon, O.De Wit, A.Ehle, I.T.Fontana Santos Alves, B.A.Ghosh, S.Gilbert, A.Granier de Cassagnac, R.Hakimi, A.Harikrishnan, B.Kalipoliti, L.Liu, G.Nguyen, M.Ochando, C.Salerno, R.Sauvan, J.B.Sirois, Y.Urda Gómez, L.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.Haeberle, R.Le Bihan, A.-C.Meena, M.Poncet, O.Saha, G.Sessini, M.A.Van Hove, P.Vaucelle, P.Di Florio, A.Amram, D.Beauceron, S.Blancon, B.Boudoul, G.Chanon, N.Contardo, D.Depasse, P.Dozen, C.El Mamouni, H.Fay, J.Gascon, S.Gouzevitch, M.Greenberg, C.Grenier, G.Ille, B.Jourd‘huy, E.Laktineh, I.B.Lethuillier, M.Mirabito, L.Perries, S.Purohit, A.Vander Donckt, M.Verdier, P.Xiao, J.Adamov, G.Lomidze, I.Tsamalaidze, Z.Botta, V.Consuegra Rodríguez, S.Feld, L.Klein, K.Lipinski, M.Meuser, D.Pauls, A.Pérez Adán, D.Röwert, N.Teroerde, M.Diekmann, S.Dodonova, A.Eich, N.Eliseev, D.Engelke, F.Erdmann, J.Erdmann, M.Fackeldey, P.Fischer, B.Hebbeker, T.Hoepfner, K.Ivone, F.Jung, A.Lee, M.y.Mausolf, F.Merschmeyer, M.Meyer, A.Mukherjee, S.Noll, D.Nowotny, F.Pozdnyakov, A.Rath, Y.Redjeb, W.Rehm, F.Reithler, H.Sarkisovi, V.Schmidt, A.Seth, C.Sharma, A.Spah, J.L.Stein, A.Da Silva De Araujo, F. TorresWiedenbeck, S.Zaleski, S.Dziwok, C.Flügge, G.Kress, T.Nowack, A.Pooth, O.Stahl, A.Ziemons, T.Zotz, A.Aarup Petersen, H.Aldaya Martin, M.Alimena, J.Amoroso, S.An, Y.Bach, J.Baxter, S.Bayatmakou, M.Becerril Gonzalez, H.Behnke, O.Belvedere, A.Blekman, F.Borras, K.Campbell, A.Cardini, A.Cheng, C.Colombina, F.Eckerlin, G.Eckstein, D.Estevez Banos, L.I.Filatov, O.Gallo, E.Geiser, A.Guglielmi, V.Guthoff, M.Hinzmann, A.Jeppe, L.Kaech, B.Kasemann, M.Kleinwort, C.Kogler, R.Komm, M.Krücker, D.Lange, W.Leyva Pernia, D.Lipka, K.Lohmann, W.Lorkowski, F.Mankel, R.Melzer-Pellmann, I.-A.Mendizabal Morentin, M.Meyer, A.B.Milella, G.Moral Figueroa, K.Mussgiller, A.Nair, L.P.Niedziela, J.Nürnberg, A.Otarid, Y.Park, J.Ranken, E.Raspereza, A.Rastorguev, D.Rübenach, J.Rygaard, L.Saggio, A.Scham, M.Schnake, S.Schütze, P.Schwanenberger, C.Selivanova, D.Sharko, K.Shchedrolosiev, M.Stafford, D.Vazzoler, F.Ventura Barroso, A.Walsh, R.Wang, D.Wang, Q.Wen, Y.Wichmann, K.Wiens, L.Wissing, C.Yang, Y.Zimermmane Castro Santos, A.Albrecht, A.Albrecht, S.Antonello, M.Bein, S.Bollweg, S.Bonanomi, M.Connor, P.El Morabit, K.Fischer, Y.Garutti, E.Grohsjean, A.Haller, J.Hundhausen, D.Jabusch, H.R.Kasieczka, G.Keicher, P.Klanner, R.Korcari, W.Kramer, T.Kuo, C.c.Kutzner, V.Labe, F.Lange, J.Lobanov, A.Matthies, C.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.Wiederspan, B.Wolf, M.Brommer, S.Butz, E.Chwalek, T.Dierlamm, A.Droll, A.Elicabuk, U.Faltermann, N.Giffels, M.Gottmann, A.Hartmann, F.Hofsaess, R.Horzela, M.Husemann, U.Kieseler, J.Klute, M.Koppenhöfer, R.Lavoryk, O.Lawhorn, J.M.Link, M.Lintuluoto, A.Maier, S.Mitra, S.Mormile, M.Müller, Th.Neukum, M.Oh, M.Pfeffer, E.Presilla, M.Quast, G.Rabbertz, K.Regnery, B.Shadskiy, N.Shvetsov, I.Simonis, H.J.Sowa, L.Stockmeier, L.Tauqeer, K.Toms, M.Trevisani, N.Von Cube, R.F.Wassmer, M.Wieland, S.Wittig, F.Wolf, R.Zuo, X.Anagnostou, G.Daskalakis, G.Kyriakis, A.Papadopoulos, A.Stakia, A.Kontaxakis, P.Melachroinos, G.Painesis, Z.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.Bestintzanos, I.Evangelou, I.Foudas, C.Kamtsikis, C.Katsoulis, P.Kokkas, P.Kosmoglou Kioseoglou, P.G.Manthos, N.Papadopoulos, I.Strologas, J.Hajdu, C.Horvath, D.Márton, K.Rádl, A.J.Sikler, F.Veszpremi, V.Csanád, M.Farkas, K.Fehérkuti, A.Gadallah, M.M.A.Kadlecsik, Á.Major, P.Pásztor, G.Veres, G.I.Ujvari, B.Zilizi, G.Bencze, G.Czellar, S.Molnar, J.Szillasi, Z.Csorgo, T.Novak, T.Bansal, S.Beri, S.B.Bhatnagar, V.Chaudhary, G.Chauhan, S.Dhingra, N.Kaur, A.Kaur, A.Kaur, H.Kaur, M.Kumar, S.Sheokand, T.Singh, J.B.Singla, A.Ahmed, A.Bhardwaj, A.Chhetri, A.Choudhary, B.C.Kumar, A.Kumar, A.Naimuddin, M.Ranjan, K.Saini, M.K.Saumya, S.Baradia, S.Barman, S.Bhattacharya, S.Das Gupta, S.Dutta, S.Dutta, S.Sarkar, S.Ameen, M.M.Behera, P.K.Behera, S.C.Chatterjee, S.Dash, G.Jana, P.Kalbhor, P.Kamble, S.Komaragiri, J.R.Kumar, D.Mishra, T.Parida, B.Pujahari, P.R.Saha, N.R.Sharma, A.Sikdar, A.K.Singh, R.K.Verma, P.Verma, S.Vijay, A.Dugad, S.Mohanty, G.B.Shelake, M.Suryadevara, P.Bala, A.Banerjee, S.Chatterjee, R.M.Guchait, M.Jain, Sh.Jaiswal, A.Kumar, S.Majumder, G.Mazumdar, K.Parolia, S.Thachayath, A.Bahinipati, S.Kar, C.Maity, D.Mal, P.Muraleedharan Nair Bindhu, V.K.Naskar, K.Nayak, A.Nayak, S.Pal, K.Sadangi, P.Swain, S.K.Varghese, S.Vats, D.Acharya, S.Alpana, A.Dube, S.Gomber, B.Hazarika, P.Kansal, B.Laha, A.Sahu, B.Sharma, S.Vaish, K.Y.Bakhshiansohi, H.Jafari, A.Zeinali, M.Bashiri, S.Chenarani, S.Etesami, S.M.Hosseini, Y.Khakzad, M.Khazaie, E.Mohammadi Najafabadi, M.Tizchang, S.Felcini, M.Grunewald, M.Abbrescia, M.Colaleo, A.Creanza, D.D’Anzi, B.De Filippis, N.De Palma, M.Elmetenawee, W.Ferrara, N.Fiore, L.Iaselli, G.Longo, L.Louka, M.Maggi, G.Maggi, M.Margjeka, I.Mastrapasqua, V.My, S.Nuzzo, S.Pellecchia, A.Pompili, A.Pugliese, G.Radogna, R.Ramos, D.Ranieri, A.Silvestris, L.Simone, F.M.Sözbilir, Ü.Stamerra, A.Troiano, D.Venditti, R.Verwilligen, P.Zaza, A.Abbiendi, G.Battilana, C.Bonacorsi, D.Capiluppi, P.Castro, A.Cavallo, F.R.Cuffiani, M.Dallavalle, G.M.Diotalevi, T.Fabbri, F.Fanfani, A.Fasanella, D.Giommi, L.Grandi, C.Guiducci, L.Lo Meo, S.Lorusso, M.Lunerti, L.Marcellini, S.Masetti, G.Navarria, F.L.Paggi, G.Perrotta, A.Primavera, F.Rossi, A.M.Rossi Tisbeni, S.Rovelli, T.Siroli, G.P.Costa, S.Di Mattia, A.Lapertosa, A.Potenza, R.Tricomi, A.Tuve, C.Assiouras, P.Barbagli, G.Bardelli, G.Camaiani, B.Cassese, A.Ceccarelli, R.Ciulli, V.Civinini, C.D’Alessandro, R.Focardi, E.Kello, T.Latino, G.Lenzi, P.Lizzo, M.Meschini, M.Paoletti, S.Papanastassiou, A.Sguazzoni, G.Viliani, L.Benussi, L.Bianco, S.Meola, S.Piccolo, D.Alves Gallo Pereira, M.Ferro, F.Robutti, E.Tosi, S.Benaglia, A.Brivio, F.Cetorelli, F.De Guio, F.Dinardo, M.E.Dini, P.Gennai, S.Gerosa, R.Ghezzi, A.Govoni, P.Guzzi, L.Lucchini, M.T.Malberti, M.Malvezzi, S.Massironi, A.Menasce, D.Moroni, L.Paganoni, M.Palluotto, S.Pedrini, D.Perego, A.Pinolini, B.S.Pizzati, G.Ragazzi, S.de Fatis, T. TabarelliBuontempo, S.Cagnotta, A.Carnevali, F.Cavallo, N.Fabozzi, F.Iorio, A.O.M.Lista, L.Paolucci, P.Rossi, B.Ardino, R.Azzi, P.Bacchetta, N.Bellato, M.Bisello, D.Bortignon, P.Bortolato, G.Bragagnolo, A.Bulla, A.C.M.Checchia, P.Dorigo, T.Gasparini, F.Gasparini, U.Giorgetti, S.Lusiani, E.Margoni, M.Meneguzzo, A.T.Migliorini, M.Pazzini, J.Ronchese, P.Rossin, R.Simonetto, F.Tosi, M.Triossi, A.Ventura, S.Zanetti, M.Zotto, P.Zucchetta, A.Zumerle, G.Braghieri, A.Calzaferri, S.Fiorina, D.Montagna, P.Re, V.Riccardi, C.Salvini, P.Vai, I.Vitulo, P.Ajmal, S.Ascioti, M.E.Bilei, G.M.Carrivale, C.Ciangottini, D.Fanò, L.Magherini, M.Mariani, V.Menichelli, M.Moscatelli, F.Rossi, A.Santocchia, A.Spiga, D.Tedeschi, T.Aimè, C.Alexe, C.A.Asenov, P.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.Marini, A.C.Matos Figueiredo, D.Messineo, A.Mishra, S.Musich, M.Palla, F.Rizzi, A.Rolandi, G.Roy Chowdhury, S.Sarkar, T.Scribano, A.Spagnolo, P.Tenchini, R.Tonelli, G.Turini, N.Vaselli, F.Venturi, A.Verdini, P.G.Baldenegro Barrera, C.Barria, P.Basile, C.Cavallari, F.Cunqueiro Mendez, L.Del Re, D.Di Marco, E.Diemoz, M.Errico, F.Gargiulo, R.Longo, E.Martikainen, L.Mijuskovic, J.Organtini, G.Pandolfi, F.Paramatti, R.Quaranta, C.Rahatlou, S.Rovelli, C.Santanastasio, F.Soffi, L.Vladimirov, V.Amapane, N.Arcidiacono, R.Argiro, S.Arneodo, M.Bartosik, N.Bellan, R.Bellora, A.Biino, C.Borca, C.Cartiglia, N.Costa, M.Covarelli, R.Demaria, N.Finco, L.Grippo, M.Kiani, B.Legger, F.Luongo, F.Mariotti, C.Markovic, L.Maselli, S.Mecca, A.Menzio, L.Meridiani, P.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.Staiano, A.Tarricone, C.Trocino, D.Umoret, G.White, R.Babbar, J.Belforte, S.Candelise, V.Casarsa, M.Cossutti, F.De Leo, K.Della Ricca, G.Dogra, S.Hong, J.Kim, B.Kim, J.Lee, D.Lee, H.Lee, S.W.Moon, C.S.Oh, Y.D.Ryu, M.S.Sekmen, S.Tae, B.Yang, Y.C.Kim, M.S.Bak, G.Gwak, P.Kim, H.Moon, D.H.Ryou, Y.Choi, S.Han, S.Hong, B.Lee, K.Lee, K.S.Lee, S.Yoo, J.Goh, J.Yang, S.Kim, H.S.Kim, Y.Lee, S.Almond, J.Bhyun, J.H.Choi, J.Choi, J.Jun, W.Kim, J.Kim, Y.W.Ko, S.Kwon, H.Lee, H.Lee, J.Lee, J.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.Ha, S.Hwang, K.Yoo, H.D.Choi, M.Kim, M.R.Lee, H.Lee, Y.Yu, I.Beyrouthy, T.Gharbia, Y.Alazemi, F.Dreimanis, K.Gaile, A.Munoz Diaz, C.Osite, D.Pikurs, G.Potrebko, A.Seidel, M.Sidiropoulos Kontos, D.Strautnieks, N.R.Ambrozas, M.Juodagalvis, A.Rinkevicius, A.Tamulaitis, G.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.Crotte Ledesma, H.De La Cruz-Burelo, E.Heredia-De La Cruz, I.Lopez-Fernandez, R.Mejia Guisao, J.Mondragon Herrera, C.A.Sánchez Hernández, A.Oropeza Barrera, C.Ramirez Guadarrama, D.L.Ramírez García, M.Bautista, I.Pedraza, I.Salazar Ibarguen, H.A.Uribe Estrada, C.Bubanja, I.Raicevic, N.Butler, P.H.Ahmad, A.Asghar, M.I.Awais, A.Awan, M.I.M.Hoorani, H.R.Khan, W.A.Avati, V.Grzanka, L.Malawski, M.Bialkowska, H.Bluj, M.Górski, M.Kazana, M.Szleper, M.Zalewski, P.Bunkowski, K.Doroba, K.Kalinowski, A.Konecki, M.Krolikowski, J.Muhammad, A.Fokow, P.Pozniak, K.Zabolotny, W.Araujo, M.Bastos, D.Da Cruz E Silva, C. BeirãoBoletti, A.Bozzo, M.Camporesi, T.Da Molin, G.Faccioli, P.Gallinaro, M.Hollar, J.Leonardo, N.Marozzo, G.B.Niknejad, T.Petrilli, A.Pisano, M.Seixas, J.Varela, J.Wulff, J.W.Adzic, P.Milenovic, P.Devetak, D.Dordevic, M.Milosevic, J.Nadderd, L.Rekovic, V.Alcaraz Maestre, J.Bedoya, Cristina F.Brochero Cifuentes, J.A.Carretero, Oliver M.Cepeda, M.Cerrada, M.Colino, N.De La Cruz, B.
DOI
10.1103/PhysRevD.111.112004
발행일
2025-06
유형
Article
저널명
Physical Review d
111
11
페이지
1 ~ 26