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2
result(s) for
"Lethuillie"
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Search for a very light NMSSM Higgs boson produced in decays of the 125 GeV scalar boson and decaying into τ leptons in pp collisions at s=8 TeV
A
bstract
A search for a very light Higgs boson decaying into a pair of
τ
leptons is presented within the framework of the next-to-minimal supersymmetric standard model. This search is based on a data set corresponding to an integrated luminosity of 19.7 fb
−1
of proton-proton collisions collected by the CMS experiment at a centre-of-mass energy of 8 TeV. The signal is defined by the production of either of the two lightest scalars, h
1
or h
2
, via gluon-gluon fusion and subsequent decay into a pair of the lightest Higgs bosons, a
1
or h
1
. The h
1
or h
2
boson is identified with the observed state at a mass of 125 GeV. The analysis searches for decays of the a
1
(h
1
) states into pairs of
τ
leptons and covers a mass range for the a
1
(h
1
) boson of 4 to 8 GeV. The search reveals no significant excess in data above standard model background expectations, and an upper limit is set on the signal production cross section times branching fraction as a function of the a
1
(h
1
) boson mass. The 95% confidence level limit ranges from 4.5 pb at
m
a
1
m
h
1
=
8
GeV to 10.3 pb at
m
a
1
m
h
1
=
5
GeV.
Journal Article
In-medium modification of dijets in PbPb collisions at $ \\sqrt{s_{\\mathrm{NN}}} $ = 5.02 TeV
Modifications to the distribution of charged particles with respect to high transverse momentum (pT) jets passing through a quark-gluon plasma are explored using the CMS detector. Back-to-back dijets are analyzed in lead-lead and proton-proton collisions at √sNN = 5.02 TeV via correlations of charged particles in bins of relative pseudorapidity and angular distance from the leading and subleading jet axes. In comparing the lead-lead and proton-proton collision results, modifications to the charged-particle relative distance distribution and to the momentum distributions around the jet axis are found to depend on the dijet momentum balance xj, which is the ratio between the subleading and leading jet pT. For events with xj ≈ 1, these modifications are observed for both the leading and subleading jets. However, while subleading jets show significant modifications for events with a larger dijet momentum imbalance, much smaller modifications are found for the leading jets in these events.
Journal Article