613 research outputs found
Exploring the Higgs Sector of a Most Natural NMSSM and its Prediction on Higgs Pair Production at the LHC
As a most natural realization of the Next-to Minimal Supersymmetry Standard
Model (NMSSM), {\lambda}-SUSY is parameterized by a large {\lambda} around one
and a low tan below 10. In this work, we first scan the parameter space
of {\lambda}-SUSY by considering various experimental constraints, including
the limitation from the Higgs data updated by the ATLAS and CMS collaborations
in the summer of 2014, then we study the properties of the Higgs bosons. We get
two characteristic features of {\lambda}-SUSY in experimentally allowed
parameter space. One is the triple self coupling of the SM-like Higgs boson may
get enhanced by a factor over 10 in comparison with its SM prediction. The
other is the pair production of the SM-like Higgs boson at the LHC may be two
orders larger than its SM prediction. All these features seems to be
unachievable in the Minimal Supersymmetric Standard Model and in the NMSSM with
a low {\lambda}. Moreover, we also find that naturalness plays an important
role in selecting the parameter space of {\lambda}-SUSY, and that the Higgs
obtained with the latest data is usually significantly smaller than
before due to the more consistency of the two collaboration measurements
Interpreting the galactic center gamma-ray excess in the NMSSM
In the Next-to-Minimal Supersymmetric Standard Model (NMSSM), all
singlet-dominated particles including one neutralino, one CP-odd Higgs boson
and one CP-even Higgs boson can be simultaneously lighter than about 100 GeV.
Consequently, dark matter (DM) in the NMSSM can annihilate into multiple final
states to explain the galactic center gamma-ray excess (GCE). In this work we
take into account the foreground and background uncertainties for the GCE and
investigate these explanations. We carry out a sophisticated scan over the
NMSSM parameter space by considering various experimental constraints such as
the Higgs data, -physics observables, DM relic desnity, LUX experiment and
the dSphs constraints. Then for each surviving parameter point we perform a fit
to the GCE spectrum by using the correlation matrix that incorporates both the
statistical and systematic uncertainties of the measured excess. After
examining the properties of the obtained GCE solutions, we conclude that the
GCE can be well explained by the pure annihilations and with being the lighter singlet-dominated CP-odd Higgs boson and
denoting the singlet-dominated CP-even Higgs boson or SM-like Higgs
boson, and it can also be explained by the mixed annihilation . Among these annihilation channels,
can provide the best
interpretation with the corresponding -value reaching 0.55. We also discuss
to what extent the future DM direct detection experiments can explore the GCE
solutions and conclude that the XENON-1T experiment is very promising in
testing nearly all the solutions.Comment: 31 pages, 7 figure
The Stressors in Professional Women’s Work-family Conflict: A Chinese Study
On the base of some existing studies on the “work-family conflict”, we investigated 121 professional women on role conflict. It summarizes the actuality of the professional women’s work-family conflict, discusses the relation of the women’s work-family conflict and their stressors, analyses the self-factors that effect the professional women’s work-family conflict. The result showed that (1) professional women’s self-role perceived and social-role perceived have conflicts;(2) education, incoming ratio, professional experience can influence the stress;(3) domesticity satisfaction, family activity, spouse stress, work devotion and work load are stressors of professional women’ s work-family conflict. Key words: professional woman; work family conflict; stressor Résumé: Sur la base des études existantes sur le "conflit travail-famille", nous avons enquêté sur 121 femmes professionnelles sur le rôle des conflits. Il résume la réalité du conflit travail-famille des femmes professionnelles, traite de la relation entre le conflit travail-famille et leur origine de stress et analyse des facteurs qui ont des influences sur le conflit travail-famille des femmes professionnelles. Le résultat a montré que (1)il y a des conflits entre le rôle personnel et le rôle social chez les femmes professionnelles; (2) l'éducation, les revenus, l'expérience professionnelle peuvent influencer le stress; (3) la satisfaction de la domesticité, les activités familiales, le stress conjugal, le dévouement pour le travail et les charges professionnelles sont des origines de stress des femmes professionnelles dans le conflit travail-famille. Mots-Clés: femmes professionnelles; le conflit travail-famille; l’origine de stres
A Simple and Green Procedure for the Synthesis of 5-Arylidenerhodanines Catalyzed by Diammonium Hydrogen Phosphate in Water
A simple and efficient procedure for the synthesis of 5-arylidenerhodanines by condensation of aromatic aldehydes with rhodanine in water using diammonium hydrogen phosphate as catalyst is described. The procedure offers several advantages including environmentally friendly, mild reaction conditions, short reaction times, high yields, and simple experimental and work-up procedures
Polarization Signals from Axion-Photon Resonant Conversion in Neutron Star Magnetosphere
Neutron stars provide ideal astrophysical laboratories for probing new
physics beyond the Standard Model. If axions exist, photons can develop linear
polarization during photon-axion conversion in the magnetic field of a neutron
star. We find that the plasma in the neutron star magnetosphere could
dramatically enhance the polarization through the resonant conversion effect.
With the polarization measurements from PSR B0531+21, PSR B0656+14, and 4U
0142+61, we derive new strong constraints on the axion-photon coupling in a
broad axion mass range eV.Comment: 7+5 pages, 2+2 figure
Explaining the DAMPE data with scalar dark matter and gauged interaction
Inspired by the peak structure observed by recent DAMPE experiment in
cosmic-ray spectrum, we consider a scalar dark matter (DM) model with
gauged symmetry, which is the most economical anomaly-free
theory to potentially explain the peak by DM annihilation in nearby subhalo. We
utilize the process , where , , denote the scalar DM,
the new gauge boson and , respectively, to generate the
spectrum. By fitting the predicted spectrum to the experimental data,
we obtain the favored DM mass range and at
Confidence Level (C.L.). Furthermore, we determine the parameter space
of the model which can explain the peak and meanwhile satisfy the constraints
from DM relic abundance, DM direct detection and the collider bounds. We
conclude that the model we consider can account for the peak, although there
exists a tension with the constraints from the LEP-II bound on
arising from the cross section measurement of .Comment: 15 pages, 4 figure
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