Many extensions of the Standard Model include SU(2) L × U(1) Y singlet higgs bosons, h 0 , and also vector-like fermions which couple to it. The production and detection possibilities of such singlet neutral scalars at hadron colliders are considered for different scenarios of vectorlike fermions. We find that for some values of masses and couplings, detection at the CERN large hadron collider (LHC) appears to be a distinct possibility, while at the Fermilab Tevatron upgrade the h 0 might be observed only in very favourable circumstances. © Springer-Verlag 1996.

ANINDYA DATTA

Physics

A RAYCHAUDHURI

S RAYCHAUDHURI

S CHAKRABARTI

Fulltext

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Zeitschrift fur Physik C-Particles and Fields

We investigate the parameter space of the Standard Model enhanced by a gauge singlet real scalar S. Taking into account all the theoretical and experimental constraints, we show the allowed parameter space for two different types of such singlet-enhanced Standard Model. For the first case, the scalar potential has an explicit Z2 symmetry and may lead to a dark matter candidate under certain conditions. For the second case, the scalar potential does not respect any Z2. This is again divided into two subcategories: one where the Standard Model vacuum is stable, and one where it is unstable and can decay into a deeper minimum. We show how the parameters in the scalar potential control the range of validity of all these models. Finally, we show the effect of one-loop correction on the positions and depths of the minima of the potential. © 2016 American Physical Society.

Physical Review D

Potential of a singlet scalar enhanced standard model

The possibility of production of singlet Higgs particles coupling to exotic fermions at the CERN e+e- Collider LEP or the SLAC Linear Collider through the loop-induced decay Z0h0 is discussed and decay signatures for the singlet Higgs boson are suggested. It appears that singlet Higgs bosons may be detectable with 107 Z0's, if the unknown masses and couplings are in the right range. © 1991 The American Physical Society.

Singlet-Higgs-boson signals at electron-positron colliders

We present a detailed calculation of the contributions from supersymmetric diagrams (involving gluino exchange) to flavor-changing decay modes of the Z boson. We find that for all processes such as Ztc» and Ztū, the supersymmetric contribution to the branching ratios is small compared to that from the standard model. Any experimental detection of such modes beyond the standard-model prediction will therefore point to the existence of new physics other than supersymmetry. © 1989 The American Physical Society.

Journal	Data powered by TypesetZeitschrift fur Physik C-Particles and Fields
Publisher	Data powered by TypesetSpringer Verlag
ISSN	0170-9739
Open Access	No