Two more hidden scalars around 125 GeV and $h \to \mu\tau$
作者： Anirban Kundu , Dipankar Das
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摘要: We show that the $2.4\sigma$ signal of leptonic flavor violating (LFV) Higgs boson decay $h\to\mu\tau$, as observed by CMS collaboration recently, can be explained a certain class two-Higgs doublet models allow controllable flavor-changing neutral current with minimal number free parameters. postulate (i) alignment limit is maintained, which means lightest scalar ($h$) has identical couplings to Standard Model and (ii) comes from two other scalars, CP-even $H$ CP-odd $A$, almost degenerate $h$ at 125 GeV. also it entirely possible these scalars are hidden, apart this LFV signal; strengths $b\bar{b}$, $\tau^+\tau^-$ $\gamma\gamma$ around GeV put severe constraints on parameter space such models; (iii) constraint further enhanced non-observation processes like $\mu\to e\gamma$, we predict branching ratio e\gamma$ cannot even an order below present experimental limit, highlighting role plays in forcing $A$ near-degenerate; (iv) enhancement production cross-section expected gluon fusion channel, should during next run LHC; (v) $e\tau$ channel least about $2\%$. The constrained minimum parameters, along strong predictions, make model easily testable falsifiable.
arxiv.org参考文章(39)
I Krätschmer, H Kirschenmann, G Steinbrück, O Gutsche, V Khachatryan, AM Sirunyan, A Tumasyan, W Adam, T Bergauer, M Dragicevic, J Erö, M Friedl, R Frühwirth, VM Ghete, C Hartl, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, D Liko, I Mikulec, D Rabady, B Rahbaran, H Rohringer, R Schöfbeck, J Strauss, W Treberer-Treberspurg, W Waltenberger, C-E Wulz, N Shumeiko, S Alderweireldt, S Bansal, T Cornelis, EA De Wolf, X Janssen, A Knutsson, J Lauwers, S Luyckx, S Ochesanu, R Rougny, M Van De Klundert, H Van Haevermaet, P Van Mechelen, A Van Spilbeeck, F Blekman, S Blyweert, J D'Hondt, N Daci, N Heracleous, J Keaveney, S Lowette, M Maes, A Olbrechts, Q Python, D Strom, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, C Caillol, B Clerbaux, G De Lentdecker, D Dobur, L Favart, APR Gay, A Grebenyuk, A Léonard, A Mohammadi, L Perniè, A Randle-conde, T Reis, T Seva, L Thomas, C Vander Velde, P Vanlaer, J Wang, F Zenoni, V Adler, K Beernaert, L Benucci, A Cimmino, S Costantini, S Crucy, A Fagot, G Garcia, J Mccartin, AA Ocampo Rios, D Poyraz, D Ryckbosch, S Salva Diblen, M Sigamani, N Strobbe, F Thyssen, M Tytgat, E Yazgan, N Zaganidis, S Basegmez, C Beluffi, G Bruno, R Castello, A Caudron, L Ceard, GG Da Silveira, C Delaere, T du Pree, D Favart, L Forthomme, A Giammanco, J Hollar, A Jafari, P Jez, M Komm, V Lemaitre, C Nuttens, D Pagano, L Perrini, A Pin, K Piotrzkowski, A Popov, L Quertenmont, M Selvaggi, M Vidal Marono, N Beliy, T Caebergs, E Daubie, GH Hammad, WL Aldá Júnior, GA Alves, L Brito, M Correa Martins Junior, T Dos Reis Martins, J Molina, C Mora Herrera, ME Pol, P Rebello Teles, W Carvalho, J Chinellato, A Custódio, EM Da Costa, D De Jesus Damiao, C De Oliveira Martins, S Fonseca De Souza, H Malbouisson, D Matos Figueiredo, L Mundim, H Nogima, WL Prado Da Silva, None, Search for lepton-flavour-violating decays of the Higgs boson Physics Letters B. ,vol. 749, pp. 337- 362 ,(2015) , 10.1016/J.PHYSLETB.2015.07.053
Roman Kogler, Max Baak, The global electroweak Standard Model fit after the Higgs discovery arXiv: High Energy Physics - Phenomenology. pp. 349- 358 ,(2013)
Scott Thomas, Jamison Galloway, Nathaniel Craig, Searching for Signs of the Second Higgs Doublet arXiv: High Energy Physics - Phenomenology. ,(2013)
Avelino Vicente, Theory and phenomenology of lepton flavor violation arXiv: High Energy Physics - Phenomenology. ,(2014)
Ivan Nisandzic, Svjetlana Fajfer, Jernej F. Kamenik, Nejc Kosnik, Ilja Dorsner, Admir Greljo, New Physics Models Facing Lepton Flavor Violating Higgs Decays at the Percent Level arXiv: High Energy Physics - Phenomenology. ,(2015) , 10.1007/JHEP06(2015)108
D Aristizabal Sierra, A Vicente, None, Explaining the CMS Higgs flavor violating decay excess Physical Review D. ,vol. 90, pp. 115004- ,(2014) , 10.1103/PHYSREVD.90.115004
W Grimus, P Osland, O M Ogreid, L Lavoura, A precision constraint on multi-Higgs-doublet models Journal of Physics G. ,vol. 35, pp. 075001- ,(2008) , 10.1088/0954-3899/35/7/075001
Chien-Yi Chen, Sally Dawson, Marc Sher, Heavy Higgs searches and constraints on two Higgs doublet models Physical Review D. ,vol. 88, pp. 015018- ,(2013) , 10.1103/PHYSREVD.88.015018
Martin Wiebusch, Ulrich Nierste, Otto Eberhardt, Status of the two-Higgs-doublet model of type II Journal of High Energy Physics. ,vol. 2013, pp. 118- ,(2013) , 10.1007/JHEP07(2013)118
Leonardo Pedro, F. J. Botella, Adrián Carmona, M. Nebot, G. C. Branco, M. N. Rebelo, Physical constraints on a class of two-Higgs doublet models with FCNC at tree level Journal of High Energy Physics. ,vol. 2014, pp. 78- ,(2014) , 10.1007/JHEP07(2014)078