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Results are reported from a search for supersymmetry in pp collisions at a center-of-mass energy of 8 TeV, based on events with a single isolated lepton (electron or muon) and multiple jets, at least two of which are identified as b jets.…

High Energy Physics - Experiment · Physics 2014-07-08 CMS Collaboration

The masses of vector supermultiplet and of the Higgs supertriplet in standard supersymmetric SU(5) model are calculated. Taking into account uncertainties related with the initial coupling constants and threshold corrections we find that in…

High Energy Physics - Phenomenology · Physics 2009-10-28 N. V. Krasnikov

Recent searches for physics beyond the standard model at high-energy colliders are reviewed, with emphasis on supersymmetry, additional space dimensions, extra gauge bosons, leptoquarks, and model-independent searches. The results reported…

High Energy Physics - Experiment · Physics 2009-01-06 J. -F. Grivaz

In unified $\mathcal{N}=1$ supergravity scenario the gaugino masses can be non-universal. The patterns of these non-universalities are dictated by the vacuum expectation values of non-singlet chiral super-fields in visible sector. Here, we…

High Energy Physics - Phenomenology · Physics 2015-07-10 Joydeep Chakrabortty , Arghya Choudhury , Subhadeep Mondal

Final states with leptons, jets and missing transverse energy are a promising way to detect Supersymmetry at the Large Hadron Collider. Results of simulation studies performed by the CMS and ATLAS collaborations are presented. The discovery…

High Energy Physics - Phenomenology · Physics 2007-10-26 Massimiliano Chiorboli

We present some phenomenology of the Higgs sector of the Minimal $B-L$ U(1) Extension of the Standard Model at the Large Hadron Collider. In this model, the existence of an extra gauge boson ($Z'$) and an extra scalar (heavy Higgs) are…

High Energy Physics - Phenomenology · Physics 2011-01-03 L. Basso , A. Belyaev , S. Moretti , G. M. Pruna

We explore a missing-partner model based on the minimal SU(5) gauge group with $\bf{75}$, $\bf{50}$ and $\bf{\overline{50}}$ Higgs representations, assuming a super-GUT CMSSM scenario in which soft supersymmetry-breaking parameters are…

High Energy Physics - Phenomenology · Physics 2021-07-14 John Ellis , Jason L. Evans , Natsumi Nagata , Keith A. Olive

Three searches are presented for signatures of physics beyond the standard model (SM) in $\tau\tau$ final states in proton-proton collisions at the LHC, using a data sample collected with the CMS detector at $\sqrt{s}$ = 13 TeV,…

High Energy Physics - Experiment · Physics 2023-07-25 CMS Collaboration

New large colliders will probe scales up to few TeV, indicating the way Nature has chosen to extend the Standard Model. We review alternative scenarios to the traditional Minimal Supersymmetric Standard Model: the little Higgs model, split…

High Energy Physics - Phenomenology · Physics 2007-05-23 F. del Aguila , R. Pittau

A search for events with jets and missing transverse energy is performed in a data sample of pp collisions collected at sqrt(s) = 7 TeV by the CMS experiment at the LHC. The analyzed data sample corresponds to an integrated luminosity of…

High Energy Physics - Experiment · Physics 2012-08-27 CMS Collaboration

We consider the simplest and most economic version among the proposed non-minimal supersymmetric models, in which the $\mu$-parameter is promoted to a singlet superfield, whose all self-couplings are absent from the renormalizable…

High Energy Physics - Phenomenology · Physics 2009-10-31 C. Panagiotakopoulos , A. Pilaftsis

Some doubts have been expressed about low energy supersymmetry (SUSY) following the first run of the LHC. In this talk I will try to present a more upbeat view based on data, rather than theoretical expectations. In particular, I will make…

High Energy Physics - Phenomenology · Physics 2015-07-28 K. Kowalska , L. Roszkowski , E. M. Sessolo , S. Trojanowski , A. J. Williams

The production of the Standard Model (SM) Higgs boson (H) in association with a jet is compared with that of the lightest scalar Higgs boson (h^0) and the pseudoscalar Higgs boson (A^0) of the Minimal Supersymmetric Model (MSSM) at both the…

High Energy Physics - Phenomenology · Physics 2008-11-26 B. Field , S. Dawson , J. Smith

Color scalars are salient features of non-minimal SU(5) model, where Higgs sector is extended by 45-dimensional multiplet. We show that gauge coupling unification can be realized in this model with TeV octet scalar and intermediate (~10^6…

High Energy Physics - Phenomenology · Physics 2015-06-23 S. Khalil , S. Salem , M. Allam

We propose a new seesaw mechanism for neutrino masses within a class of supersymmetric SO(10) models with broken D-parity. It is shown that in such scenarios the B-L scale can be as low as TeV without generating inconsistencies with gauge…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Malinsky , J. C. Romao , J. W. F. Valle

We promote the microscopic theory of standard model (MSM, hep-ph/0007077) into supersymmetric framework in order to solve its technical aspects of vacuum zero point energy and hierarchy problems, and attempt, further, to develop its…

High Energy Physics - Phenomenology · Physics 2007-05-23 G. T. Ter-Kazarian

We construct a supersymmetric SU(2)_L X SU(2)_R X U(1)_B-L model in which a discrete symmetry (C-parity) implements strict left-right symmetry in the scalar (Higgs) sector. Although two electroweak bidoublets are introduced to accommodate…

High Energy Physics - Phenomenology · Physics 2008-11-26 Chin-Aik Lee , Qaisar Shafi

The possibility of identification of an observable CMS $\mu^+ \mu^-$ excess at 28 GeV in the channel $pp\to \mu^+ \mu^- b \bar b$ at $\sqrt{s}$=8 TeV and 13 TeV as a manifestation of one of the minimal supersymmetric standard model (MSSM)…

High Energy Physics - Phenomenology · Physics 2019-08-15 Mikhail Dubinin , Elena Fedotova

We present phenomenological study of the most minimal realistic $SU(5)$ model that owns its predictivity solely to the gauge symmetry and the representational content. The model is built entirely out of the fields residing in the first five…

High Energy Physics - Phenomenology · Physics 2021-07-21 Ilja Doršner , Emina Džaferović-Mašić , Shaikh Saad

The Fermi National Accelerator Laboratory (FNAL) recently announced confirmation of the Brookhaven National Lab (BNL) measurements of the $g-2$ of the muon that uncovered a discrepancy with the theoretically calculated Standard Model value.…

High Energy Physics - Phenomenology · Physics 2021-12-03 Tianjun Li , James A. Maxin , Dimitri V. Nanopoulos