395 research outputs found
A generic smartphone-based sensing and processing system applied to epileptic seizure monitoring
Daytime monitoring of patients with epileptic seizures using a smartphone processing framework and on-body sensors
Angular analysis and branching fraction measurement of the decay B0âK*0Îź+Îźâ
The angular distributions and the differential branching fraction of the decay B0âK*(892)0Îź+Îźâ are studied using a data sample corresponding to an integrated luminosity of 5.2Â fbâ1collected with the CMS detector at the LHC in pp collisions at âs=7Â TeV. From more than 400 signal decays, the forwardâbackward asymmetry of the muons, the K*(892)0 longitudinal polarization fraction, and the differential branching fraction are determined as a function of the square of the dimuon invariant mass. The measurements are in good agreement with standard model predictions
Erratum to: Search for new physics in events with same-sign dileptons and jets in pp collisions at âs = 8 TeV
Measurement of jet multiplicity distributions in ttÂŻ production in pp collisions at sâ=7TeV
This is the published version
Search for electroweak production of charginos and neutralinos in WH events in proton-proton collisions at sâ=13 TeV
Results are reported from a search for physics beyond the standard model in proton-proton collision events with a charged lepton (electron or muon), two jets identified as originating from a bottom quark decay, and significant imbalance in the transverse momentum. The search was performed using a data sample corresponding to 35.9 fbâ1, collected by the CMS experiment in 2016 at sâ=13 TeV. Events with this signature can arise, for example, from the electroweak production of gauginos, which are predicted in models based on supersymmetry. The event yields observed in data are consistent with the estimated standard model backgrounds. Limits are obtained on the cross sections for chargino-neutralino (Ď~Âą1Ď~02) production in a simplified model of supersymmetry with the decays ĎÂą1âWÂąĎ~01andĎ~02âHĎ01. Values of mĎ~Âą1 between 220 and 490 GeV are excluded at 95% confidence level by this search when the Ď~01 is massless, and values of mĎ~01 are 1 excluded up to 110 GeV for mĎ~Âą1â450 GeV
Constraining 2HDM by Present and Future Muon(g-2) Data
Constraints on the general 2HDM ("Model II") are obtained from the existing
data including limits on Higgs bosons masses from LEP I data. We
consider separately two cases: with a light scalar and with a light
pseudoscalar , assuming . The charged Higgs
contribution is also included. It is found that already the present
data improve limits obtained recently by ALEPH collaboration on
\tb for the mass of the pseudoscalar below \mr 2 GeV. The improvement in
the accuracy by factor 20 in the forthcoming E821 experiment may lead to more
stringent, than provided by ALEPH group, limits up to 30 GeV if the
mass difference between and is . Similar results should hold
for a light scalar scenario as well.Comment: 19 pages, including 5 figure
News from the Muon (g-2) Experiment at BNL
The magnetic moment anomaly a_mu = (g_mu - 2) / 2 of the positive muon has
been measured at the Brookhaven Alternating Gradient Synchrotron with an
uncertainty of 0.7 ppm. The new result, based on data taken in 2000, agrees
well with previous measurements. Standard Model evaluations currently differ
from the experimental result by 1.6 to 3.0 standard deviations.Comment: Talk presented at RADCOR - Loops and Legs 2002, Kloster Banz,
Germany, September 8-13 2002, to be published in Nuclear Physics B (Proc.
Suppl.); 5 pages, 3 figure
Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV
Results are presented from a search for a W' boson using a dataset
corresponding to 5.0 inverse femtobarns of integrated luminosity collected
during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV.
The W' boson is modeled as a heavy W boson, but different scenarios for the
couplings to fermions are considered, involving both left-handed and
right-handed chiral projections of the fermions, as well as an arbitrary
mixture of the two. The search is performed in the decay channel W' to t b,
leading to a final state signature with a single lepton (e, mu), missing
transverse energy, and jets, at least one of which is tagged as a b-jet. A W'
boson that couples to fermions with the same coupling constant as the W, but to
the right-handed rather than left-handed chiral projections, is excluded for
masses below 1.85 TeV at the 95% confidence level. For the first time using LHC
data, constraints on the W' gauge coupling for a set of left- and right-handed
coupling combinations have been placed. These results represent a significant
improvement over previously published limits.Comment: Submitted to Physics Letters B. Replaced with version publishe
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