1,258 research outputs found
A 96 GeV Higgs boson in the N2HDM
We discuss a ∼3σ signal (local) in the light Higgs-boson search in the diphoton decay mode at ∼96GeV as reported by CMS, together with a ∼2σ excess (local) in the bb¯ final state at LEP in the same mass range. We interpret this possible signal as a Higgs boson in the 2 Higgs Doublet Model with an additional real Higgs singlet (N2HDM). We find that the lightest Higgs boson of the N2HDM can perfectly fit both excesses simultaneously, while the second lightest state is in full agreement with the Higgs-boson measurements at 125GeV, and the full Higgs-boson sector is in agreement with all Higgs exclusion bounds from LEP, the Tevatron and the LHC as well as other theoretical and experimental constraints. We show that only the N2HDM type II and IV can fit both the LEP excess and the CMS excess with a large ggF production component at ∼96GeV. We derive bounds on the N2HDM Higgs sector from a fit to both excesses and describe how this signal can be further analyzed at the LHC and at future e+e- colliders, such as the ILCThe work was supported in part by the MEINCOP (Spain) under contract FPA2016-78022-P and in part by the AEI through the grant IFT Centro de Excelencia Severo Ochoa SEV-2016-0597. The work of T.B. and S.H. was supported in part by the Spanish Agencia Estatal de Investigación (AEI), in part by the EU Fondo Europeo de Desarrollo Regional (FEDER) through the project FPA2016-78645-P, in part by the “Spanish Red Consolider MultiDark” FPA2017-90566-REDC. The work of T.B. was funded by Fundación La Caixa under ‘La Caixa-Severo Ochoa’ international predoctoral gran
Implication of Higgs at 125 GeV within Stochastic Superspace Framework
We revisit the issue of considering stochasticity of Grassmannian coordinates
in N=1 superspace, which was analyzed previously by Kobakhidze {\it et al}. In
this stochastic supersymmetry(SUSY) framework, the soft SUSY breaking terms of
the minimal supersymmetric Standard Model(MSSM) such as the bilinear Higgs
mixing, trilinear coupling as well as the gaugino mass parameters are all
proportional to a single mass parameter \xi, a measure of supersymmetry
breaking arising out of stochasticity. While a nonvanishing trilinear coupling
at the high scale is a natural outcome of the framework, a favorable signature
for obtaining the lighter Higgs boson mass at 125 GeV, the model produces
tachyonic sleptons or staus turning to be too light. The previous analyses took
, the scale at which input parameters are given, to be larger than the
gauge coupling unification scale in order to generate acceptable scalar
masses radiatively at the electroweak scale. Still this was inadequate for
obtaining at 125 GeV. We find that Higgs at 125 GeV is highly achievable
provided we are ready to accommodate a nonvanishing scalar mass soft SUSY
breaking term similar to what is done in minimal anomaly mediated SUSY breaking
(AMSB) in contrast to a pure AMSB setup. Thus, the model can easily accommodate
Higgs data, LHC limits of squark masses, WMAP data for dark matter relic
density, flavor physics constraints and XENON100 data. In contrast to the
previous analyses we consider , thus avoiding any ambiguities of a
post-grand unified theory physics. The idea of stochastic superspace can easily
be generalized to various scenarios beyond the MSSM . PACS Nos: 12.60.Jv,
04.65.+e, 95.30.Cq, 95.35.+dComment: LaTex, 35 pages, 7 figures. Minor changes in text. B-physics
constraints updated with no change in conclusion. Version to be published in
PR
Relaxation in statistical many-agent economy models
We review some statistical many-agent models of economic and social systems
inspired by microscopic molecular models and discuss their stochastic
interpretation. We apply these models to wealth exchange in economics and study
how the relaxation process depends on the parameters of the system, in
particular on the saving propensities that define and diversify the agent
profiles.Comment: Revised final version. 6 pages, 5 figure
The "96 GeV excess" at the LHC
The CMS collaboration reported an intriguing \sim 3 sigma (local) excess at
96 GeV in the light Higgs-boson search in the diphoton decay mode. This mass
coincides with a \sim 2 sigma (local) excess in the bb final state at LEP. We
briefly review the proposed combined interpretations for the two excesses. In
more detail we review the interpretation of this possible signal as the
lightest Higgs boson in the 2 Higgs Doublet Model with an additional real Higgs
singlet (N2HDM). We show which channels have the best prospects for the
discovery of additional Higgs bosons at the upcoming Run 3 of the LHC.Comment: 7 pages, 1 figure. Talk presented at the IAS Program on High Energy
Physics (HEP) 2020. These proceedings complement with new material the
original paper, arXiv:1903.11661, and the subsequent arXiv:1910.06858,
arXiv:2002.06904. On popular demand we have included again a list of models
explaining the excesse
UV completion of an axial, leptophobic,
The -portal is one of most popular and well-explored scenarios of dark
matter (DM). To avoid the strong constraints coming from dilepton resonance
searches at the LHC and direct detection of DM, it is usually required that in
addition to being leptophobic, the is axially coupled to either the
(fermionic) DM or the standard model (SM) quarks. The first possibility has
been extensively studied both in the context of simplified model and UV
complete scenarios. However, the studies on the second possibiliy are largely
confined to simplified models only. Here, we construct the minimal UV
completion of these models satisfying both the criteria of leptophobia and
purely axial quark coupling. The anomaly cancellation conditions demand
highly non-trivial structures, not only in the dark sector, but also in the
Higgs sector.Comment: 15 pages. Improved version with phenomenological implications
addressed and references adde
A Review on Beneficiation Prospect of Some of the Graphite Deposits of Palamu District of Bihar
Graphite constitutes one of the important minerals for the manufacture of special types of refractory materials. In nature it occurs both in crystalline as well as amorphous forms. It is reported to occur in almost every State of India. In Bihar economic deposits of graphite are confined to the district of Palamu only with some minor occurences in Monghyr and Ranchi districts. G.S.I has located some important workable deposits whose estimated total reserves amount to about 16 lakhs tonnes upto 20 meters depth. These depsits are poorer in grade but sometimes the fixed carbon content is of the order of 50% F.C. A few customary processing plants have also been put up by some private parties
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