Ghosh, Kirtiman ; Mukhopadhyaya, Biswarup ; Sarkar, Utpal (2011) Signals of an invisibly decaying Higgs boson in a scalar dark matter scenario: a study for the large hadron collider Physical Review D, 84 (1). 015017_1-015017_9. ISSN 0556-2821
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Official URL: http://prd.aps.org/abstract/PRD/v84/i1/e015017
Related URL: http://dx.doi.org/10.1103/PhysRevD.84.015017
Abstract
We consider the collider phenomenology of a singlet Majoron model with softly broken lepton number. Lepton number is spontaneously broken when the real part of a new singlet scalar develops a vacuum expectation value. With the additional soft terms violating lepton numbers, the imaginary part of this singlet scalar becomes a massive pseudo-Majoron which can account for the dark matter. In the presence of the coupling of the pseudo-Majoron with the standard model (SM) Higgs, the SM Higgs mostly decays into a pair of pseudo-Majorons, giving rise to ET signals at a hadron collider. Since the Higgs visible decay branching fractions get reduced in the presence of this invisible decay mode, the bounds on the SM Higgs mass from the CERN LEP and Tevatron experiments get diluted, and the invisible decay channel of the Higgs becomes important for the discovery of low mass Higgs at the Large Hadron Collider.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Physical Society. |
ID Code: | 95794 |
Deposited On: | 07 Dec 2012 09:07 |
Last Modified: | 07 Dec 2012 09:07 |
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