This article presents a model-independent search for an additional, mostly sterile, heavy neutral lepton (HNL), that is capable of mixing with the Standard Model tau neutrino with a mixing strength of jU tau 4j2, corresponding to the absolute square of the extended Pontecorvo-Maki-Nakagawa-Sakata matrix element. Data from the BABAR experiment, with a total integrated luminosity of 424 fb-1, are analyzed using a kinematic approach that makes no assumptions on the model behind the origins of the HNL, its lifetime or decay modes. No significant signal is found. Upper limits on jU tau 4j2 at the 95% confidence level, depend on the HNL mass hypothesis and vary from 2.31 x 10-2 to 5.04 x 10-6 (with all uncertainties considered), across the mass range 100 < m4 < 1300 MeV/c2; the more stringent limits being placed at higher masses. (BABAR Collaboration)

Search for heavy neutral leptons using tau lepton decays at BaBaR [Search for heavy neutral leptons using tau lepton decays at BABAR] / J. . Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. . Brown, Y. . Kolomensky, M. Fritsch, H. Koch, R. Cheaib, C. Hearty, T. . Mattison, J. . Mckenna, R. . So, V. . Blinov, A. . Buzykaev, V. . Druzhinin, E. . Kozyrev, E. . Kravchenko, S. . Serednyakov, Y. . Skovpen, E. . Solodov, K. . Todyshev, A. . Lankford, B. Dey, J. . Gary, O. Long, A. . Eisner, W. . Lockman, W. Panduro Vazquez, D. . Chao, C. . Cheng, B. Echenard, K. . Flood, D. . Hitlin, Y. Li, D. . Lin, S. Middleton, T. . Miyashita, P. Ongmongkolkul, J. Oyang, F. . Porter, M. Röhrken, B. . Meadows, M. . Sokoloff, J. . Smith, S. . Wagner, D. Bernard, M. Verderi, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, V. Santoro, A. Calcaterra, R. de Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I. . Peruzzi, M. Piccolo, M. Rotondo, A. Zallo, S. Passaggio, C. Patrignani, B. . Shuve, H. . Lacker, B. Bhuyan, U. Mallik, C. Chen, J. Cochran, S. Prell, A. . Gritsan, N. Arnaud, M. Davier, F. Le Diberder, A. . Lutz, G. Wormser, D. . Lange, D. . Wright, J. . Coleman, D. . Hutchcroft, D. . Payne, C. Touramanis, A. . Bevan, F. Di Lodovico, G. Cowan, S. Banerjee, D. . Brown, C. . Davis, A. . Denig, W. Gradl, K. Griessinger, A. Hafner, K. . Schubert, R. . Barlow, G. . Lafferty, R. Cenci, A. Jawahery, D. . Roberts, R. Cowan, S. . Robertson, R. . Seddon, N. Neri, F. Palombo, L. Cremaldi, R. Godang, D. . Summers, G. De Nardo, C. Sciacca, C. . Jessop, J. . Losecco, K. Honscheid, A. Gaz, M. Margoni, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben-Haim, M. Bomben, G. . Bonneaud, G. Calderini, J. Chauveau, G. Marchiori, J. Ocariz, M. Biasini, E. Manoni, A. Rossi, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, M. Chrzaszcz, F. Forti, M. . Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, M. Rama, G. Rizzo, J. . Walsh, L. Zani, A. . . Smith, F. Anulli, R. Faccini, F. Ferrarotto, F. Ferroni, A. Pilloni, C. Bünger, S. Dittrich, O. Grünberg, T. Leddig, C. Voß, R. Waldi, T. Adye, F. . Wilson, S. Emery, G. Vasseur, D. Aston, C. Cartaro, M. . Convery, M. Ebert, R. . Field, B. . Fulsom, M. . Graham, C. Hast, P. Kim, S. Luitz, D. . Macfarlane, D. . Muller, H. Neal, B. . Ratcliff, A. Roodman, M. . Sullivan, J. Va'Vra, W. . Wisniewski, M. . Purohit, J. . Wilson, S. . Sekula, H. Ahmed, N. Tasneem, M. Bellis, P. . Burchat, E. . . Puccio, J. . Ernst, R. Gorodeisky, N. Guttman, D. . Peimer, A. Soffer, S. . Spanier, J. . Ritchie, J. . Izen, X. . Lou, F. Bianchi, F. De Mori, A. Filippi, L. Lanceri, L. Vitale, F. Martinez-Vidal, A. Oyanguren, J. Albert, A. Beaulieu, F. . Bernlochner, G. . King, R. Kowalewski, T. Lueck, C. Miller, I. . Nugent, J. . Roney, R. . Sobie, T. . Gershon, P. . Harrison, T. . Latham, S. . Wu, N. Null. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 107:5(2023 Mar 23), pp. 052009.1-052009.18. [10.1103/physrevd.107.052009]

Search for heavy neutral leptons using tau lepton decays at BaBaR [Search for heavy neutral leptons using tau lepton decays at BABAR]

N. Neri;F. Palombo;
2023

Abstract

This article presents a model-independent search for an additional, mostly sterile, heavy neutral lepton (HNL), that is capable of mixing with the Standard Model tau neutrino with a mixing strength of jU tau 4j2, corresponding to the absolute square of the extended Pontecorvo-Maki-Nakagawa-Sakata matrix element. Data from the BABAR experiment, with a total integrated luminosity of 424 fb-1, are analyzed using a kinematic approach that makes no assumptions on the model behind the origins of the HNL, its lifetime or decay modes. No significant signal is found. Upper limits on jU tau 4j2 at the 95% confidence level, depend on the HNL mass hypothesis and vary from 2.31 x 10-2 to 5.04 x 10-6 (with all uncertainties considered), across the mass range 100 < m4 < 1300 MeV/c2; the more stringent limits being placed at higher masses. (BABAR Collaboration)
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
23-mar-2023
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1109670
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