A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the H arrow right gamma gamma and H arrow right ZZ arrow ...right 4scriptl decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two experiments. The measured masses from the individual channels and the two experiments are found to be consistent among themselves. The combined measured mass of the Higgs boson is mH=125.09+ or -0.21 (stat)+ or -0.11 (syst) GeV.
Zusammenfassung
Medikationsanalysen durch Stationsapotheker:innen sind eine wichtige Maßnahme der Arzneimitteltherapiesicherheit (AMTS). Dabei werden medikationsbezogene Probleme (Medication Related ...Problems MRPs) identifiziert und zusammen mit den behandelnden Ärzt:innen gelöst. Die Personalressourcen für erweiterte Medikationsanalysen und eine vollständige Dokumentation sind jedoch häufig begrenzt. Bisher müssen Daten, die für die Identifikation von Risikopatient:innen und für eine erweiterte Medikationsanalyse benötigt werden, oft aus verschiedenen Teilen der einrichtungsinternen elektronischen Patientenakte („Electronic Medical Record“ EMR) zusammengesucht werden. Dieser fehleranfällige und zeitaufwändige Prozess soll im Projekt INTERPOLAR durch die Nutzung eines durch die Datenintegrationszentren (DIZ) bereitgestellten IT-Werkzeuges verbessert werden.
INTERPOLAR (INTERventional POLypharmacy – Drug InterActions – Risks) ist ein „Use Case“ der Medizininformatik-Initiative (MII), der auf das Thema AMTS fokussiert. Die Planungsphase fand im Jahr 2023 statt, die Routineimplementation ist ab 2024 vorgesehen. AMTS-relevante Daten aus dem EMR sollen dargestellt und die Dokumentation der MRPs in der Routineversorgung erleichtert werden. Die prospektive multizentrische, clusterrandomisierte INTERPOLAR-1-Studie dient dazu, den Nutzen der IT-Unterstützung in der Routineversorgung zu evaluieren. Ziel ist es, zu zeigen, dass mithilfe der IT-Unterstützung mehr MRPs entdeckt und auch gelöst werden können. Dazu werden an 8 Universitätskliniken jeweils 6 Normalstationen ausgewählt, sodass 48 Cluster (mit insgesamt mindestens 70.000 Fällen) zur Randomisierung bereitstehen.
The first direct search for lepton-flavour-violating decays of the recently discovered Higgs boson (H) is described. The search is performed in the H to mu taue and H to mu tauh channels, where taue ...and tauh are tau leptons reconstructed in the electronic and hadronic decay channels, respectively. The data sample used in this search was collected in pp collisions at a centre-of-mass energy of sqrt(s) = 8 TeV with the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 19.7 inverse femtobarns. The sensitivity of the search is an order of magnitude better than the existing indirect limits. A slight excess of signal events with a significance of 2.4 standard deviations is observed. The p-value of this excess at MH = 125 GeV is 0.010. The best fit branching fraction is B(H to mu tau)=(0.84+0.39-0.3})%. A constraint on the branching fraction, B(H to mu tau)<1.51% at 95% confidence level is set. This limit is subsequently used to constrain the mu-tau Yukawa couplings to be less than 3.6E-3.
Following the success of the XRootd-based US CMS data federation, the AAA project investigated extensions of the federation architecture by developing two sample implementations of an XRootd, ...disk-based, caching proxy. The first one simply starts fetching a whole file as soon as a file open request is received and is suitable when completely random file access is expected or it is already known that a whole file be read. The second implementation supports on-demand downloading of partial files. Extensions to the Hadoop Distributed File System have been developed to allow for an immediate fallback to network access when local HDFS storage fails to provide the requested block. Both cache implementations are in pre-production testing at UCSD.
A search for the resonant production of high-mass photon pairs is presented. The analysis is based on samples of proton-proton collision data collected by the CMS experiment at center-of-mass ...energies of 8 and 13 TeV, corresponding to integrated luminosities of 19.7 and 3.3fb super(?1), respectively. The interpretation of the search results focuses on spin-0 and spin-2 resonances with masses between 0.5 and 4 TeV and with widths, relative to the mass, between 1.4x10 super(?4) and 5.6x10 super(?2). Limits are set on scalar resonances produced through gluon-gluon fusion, and on Randall-Sundrum gravitons. A modest excess of events compatible with a narrow resonance with a mass of about 750 GeV is observed. The local significance of the excess is approximately 3.4 standard deviations. The significance is reduced to 1.6 standard deviations once the effect of searching under multiple signal hypotheses is considered. More data are required to determine the origin of this excess.
A search is performed for a new resonance decaying into a lighter resonance and a Z boson. Two channels are studied, targeting the decay of the lighter resonance into either a pair of oppositely ...charged τ leptons or a bb‾ pair. The Z boson is identified via its decays to electrons or muons. The search exploits data collected by the CMS experiment at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.8 fb−1. No significant deviations are observed from the standard model expectation and limits are set on production cross sections and parameters of two-Higgs-doublet models.
We present a measurement of the Z boson differential cross section in rapidity and transverse momentum using a data sample of pp collision events at a centre-of-mass energy sqrt(s)=8 TeV, ...corresponding to an integrated luminosity of 19.7 inverse femtobarns. The Z boson is identified via its decay to a pair of muons. The measurement provides a precision test of quantum chromodynamics over a large region of phase space. In addition, due to the small experimental uncertainties in the measurement the data has the potential to constrain the gluon parton distribution function in the kinematic regime important for Higgs boson production via gluon fusion. The results agree with the next-to-next-to-leading-order predictions computed with the FEWZ program. The results are also compared to the commonly used leading-order MADGRAPH and next-to-leading-order POWHEG generators.
Results are presented of a search for heavy particles decaying into two photons. The analysis is based on a 19.7fb-1 sample of proton–proton collisions at $\sqrt{s}$ = 8 TeV collected with the CMS ...detector at the CERN LHC. The diphoton mass spectrum from 150 to 850 GeV is used to search for an excess of events over the background. The search is extended to new resonances with natural widths of up to 10% of the mass value. No evidence for new particle production is observed and limits at 95% confidence level on the production cross section times branching fraction to diphotons are determined. These limits are interpreted in terms of two-Higgs-doublet model parameters.
The inclusive cross section for top-quark pair production measured by the CMS experiment in proton–proton collisions at a center-of-mass energy of 7 TeV is compared to the QCD prediction at ...next-to-next-to-leading order with various parton distribution functions to determine the top-quark pole mass, mtpole, or the strong coupling constant, αS. With the parton distribution function set NNPDF2.3, a pole mass of 176.7−3.4+3.8 GeV is obtained when constraining αS at the scale of the Z boson mass, mZ, to the current world average. Alternatively, by constraining mtpole to the latest average from direct mass measurements, a value of αS(mZ)=0.1151−0.0032+0.0033 is extracted. This is the first determination of αS using events from top-quark production.
A search for the pair production of new light bosons, each decaying into a pair of muons, is performed with the CMS experiment at the LHC, using a dataset corresponding to an integrated luminosity of ...20.7 fb−1 collected in proton–proton collisions at center-of-mass energy of s=8 TeV. No excess is observed in the data relative to standard model background expectation and a model independent upper limit on the product of the cross section, branching fraction, and acceptance is derived. The results are compared with two benchmark models, the first one in the context of the next-to-minimal supersymmetric standard model, and the second one in scenarios containing a hidden sector, including those predicting a nonnegligible light boson lifetime.
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