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11 papers found.
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Searching for flavored gauge bosons

Abstract Standard Model may allow an extended gauge sector with anomaly-free flavored gauge symmetries, such as Li −Lj , Bi −Lj , and B −3Li, where i, j = 1, 2, 3 are flavor indices. We investigate phenomenological implications of the new flavored gauge boson Z′ in the above three classes of gauge symmetries. Focusing on the gauge boson mass above 5 GeV, we use the lepton...

Heavy Majorana neutrino pair productions at the LHC in minimal U(1) extended Standard Model

In our recent paper (Das et al. in Phys Rev D 97:115023, 2018) we explored a prospect of discovering the heavy Majorana right-handed neutrinos (RHNs) at the future LHC in the context of the minimal non-exotic U(1) extended Standard Model (SM), where a pair of RHNs are created via decay of resonantly produced massive U(1) gauge boson (\(Z^{\prime }\)). We have pointed out that...

Scalar dark matter search from the extended νTHDM

Abstract We consider a neutrino Two Higgs Doublet Model (νTHDM) in which neutrinos obtain naturally small Dirac masses from the soft symmetry breaking of a global U(1) X symmetry. We extended the model so the soft term is generated by the spontaneous breaking of U(1) X by a new scalar field. The symmetry breaking pattern can also stabilize a scalar dark matter candidate. After...

Searching for the Minimal Seesaw Models at the LHC and Beyond

@scisyhpmadnirasad Received 28 July 2017; Accepted 21 February 2018; Published 19 April 2018 Academic Editor: Ning Chen Copyright © 2018 Arindam Das. This is an open access article distributed under the Creative

Searching for the Minimal Seesaw Models at the LHC and Beyond

The existence of the tiny neutrino mass and the flavor mixing can be naturally explained by type I Seesaw model which is probably the simplest extension of the Standard Model (SM) using Majorana type SM gauge singlet heavy Right Handed Neutrinos (RHNs). If the RHNs are around the Electroweak- (EW-) scale having sizable mixings with the SM light neutrinos, they can be produced at...

Searching for the Minimal Seesaw Models at the LHC and Beyond

@scisyhpmadnirasad Received 28 July 2017; Accepted 21 February 2018; Published 19 April 2018 Academic Editor: Ning Chen Copyright © 2018 Arindam Das. This is an open access article distributed under the Creative

Electroweak vacuum stability in classically conformal \(B-L\) extension of the standard model

We consider the minimal U(1)\(_{B-L}\) extension of the standard model (SM) with the classically conformal invariance, where an anomaly-free U(1)\(_{B-L}\) gauge symmetry is introduced along with three generations of right-handed neutrinos and a U(1)\(_{B-L}\) Higgs field. Because of the classically conformal symmetry, all dimensional parameters are forbidden. The \(B-L\) gauge...

Understanding collaboration in a multi-national research capacity-building partnership: a qualitative study

Background Research capacity building and its impact on policy and international research partnership is increasingly seen as important. High income and low- and middle-income countries frequently engage in research collaborations. These can have a positive impact on research capacity building, provided such partnerships are long-term collaborations with a unified aim, but they...

Production of heavy neutrino in next-to-leading order QCD at the LHC and beyond

Majorana and pseudo-Dirac heavy neutrinos are introduced into the type-I and inverse seesaw models, respectively, in explaining the naturally small neutrino mass. TeV scale heavy neutrinos can also be accommodated to have a sizable mixing with the Standard Model light neutrinos, through which they can be produced and detected at the high energy colliders. In this paper we...

Testing the 2-TeV resonance with trileptons

The CMS collaboration has reported a 2.8σ excess in the search of the SU(2) R gauge bosons decaying through right-handed neutrinos into the two electron plus two jets (eejj) final states. This can be explained if the SU(2) R charged gauge bosons W R ± have a mass of around 2 TeV and a right-handed neutrino with a mass of \( \mathcal{O} \)(1) TeV mainly decays to electron. Indeed...