Search for dark Higgsstrahlung in e+ e- -> mu+ mu- and missing energy events with the KLOE experiment

2 Collaboration; D. Babusci; G. Bencivenni; C. Bloise; F. Bossi; P. Branchini; A. Budano; L. Caldeira Balkestahl; F. Ceradini; P. Ciambrone; F. Curciarello; E. Czerwinski; E. Dane'; V. De Leo; E. De Lucia; A. De Santis; P. De Simone; A. Di Cicco; A. Di Domenico; R. Di Salvo; D. Domenici; A. Fantini; G. Felici; S. Fiore; A. Gajos; P. Gauzzi; G. Giardina; S. Giovannella; E. Graziani; F. Happacher; L. Heijkenskjold; W. Ikegami Andersson; T. Johansson; D. Kaminska; W. Krzemien; A. Kupsc; S. Loffredo; G. Mandaglio; M. Martini; M. Mascolo; R. Messi; S. Miscetti; G. Morello; D. Moricciani; P. Moskal; F. Nguyen; A. Palladino; A. Passeri; V. Patera; A. Ranieri; P. Santangelo; I. Sarra; M. Schioppa; M. Silarski; L. Tortora; G. Venanzoni; W. Wislicki; M. Wolke

doi:10.1016/j.physletb.2015.06.015

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arXiv · 1501.06795

Search for dark Higgsstrahlung in e+ e- -> mu+ mu- and missing energy events with the KLOE experiment

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Abstract

We searched for evidence of a Higgsstrahlung process in a secluded sector, leading to a final state with a dark photon U and a dark Higgs boson h', with the KLOE detector at DAFNE. We investigated the case of h' lighter than U, with U decaying into a muon pair and h' producing a missing energy signature. We found no evidence of the process and set upper limits to its parameters in the range 2m_mu<m_U<1000 MeV, m_h'<m_U.

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2 Collaboration, D. Babusci, G. Bencivenni, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkestahl, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwinski, E. Dane', V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, R. Di Salvo, D. Domenici, A. Fantini, G. Felici, S. Fiore, A. Gajos, P. Gauzzi, G. Giardina, S. Giovannella, E. Graziani, F. Happacher, L. Heijkenskjold, W. Ikegami Andersson, T. Johansson, D. Kaminska, W. Krzemien, A. Kupsc, S. Loffredo, G. Mandaglio, M. Martini, M. Mascolo, R. Messi, S. Miscetti, G. Morello, D. Moricciani, P. Moskal, F. Nguyen, A. Palladino, A. Passeri, V. Patera, A. Ranieri, P. Santangelo, I. Sarra, M. Schioppa, M. Silarski, L. Tortora, G. Venanzoni, W. Wislicki, M. Wolke. 2015-01-27. Search for dark Higgsstrahlung in e+ e- -> mu+ mu- and missing energy events with the KLOE experiment. https://doi.org/10.1016/j.physletb.2015.06.015

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