5 research outputs found

    Search for exotic resonances decaying into WZ/ZZ in pp collisions at √s=7 TeV

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    Journal of High Energy Physics 2013.2 (2013): 036 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMA search for new exotic particles decaying to the VZ final state is performed, where V is either a W or a Z boson decaying into two overlapping jets and the Z decays into a pair of electrons, muons or neutrinos. The analysis uses a data sample of pp collisions corresponding to an integrated luminosity of 5 fb-1 collected by the CMS experiment at the LHC at √s=7 TeV in 2011. No significant excess is observed in the mass distribution of the VZ candidates compared with the background expectation from standard model processes. Model-dependent upper limits at the 95% confidence level are set on the product of the cross section times the branching fraction of hypothetical particles decaying to the VZ final state as a function of mass. Sequential standard model W′ bosons with masses between 700 and 940 GeV are excluded. In the Randall-Sundrum model for graviton resonances with a coupling parameter of 0.05, masses between 750 and 880 GeV are also exclude

    Searches for long-lived charged particles in pp collisions at √s =7 and 8 TeV

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    Results of searches for heavy stable charged particles produced in pp collisions at √s =7 and 8 TeV are presented corresponding to an integrated luminosity of 5.0 fb⁻¹ and 18.8 fb⁻¹, respectively. Data collected with the CMS detector are used to study the momentum, energy deposition, and time-of-flight of signal candidates. Leptons with an electric charge between e/3 and 8e, as well as bound states that can undergo charge exchange with the detector material, are studied. Analysis results are presented for various combinations of signatures in the inner tracker only, inner tracker and muon detector, and muon detector only. Detector signatures utilized are long time-of-flight to the outer muon system and anomalously high (or low) energy deposition in the inner tracker. The data are consistent with the expected background, and upper limits are set on the production cross section of long-lived gluinos, scalar top quarks, and scalar τ leptons, as well as pair produced long-lived leptons. Corresponding lower mass limits, ranging up to 1322 GeV/c² for gluinos, are the most stringent to date

    Extradition and Individual Rights: The Need for an International Criminal Court to Safeguard Individual Rights

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    This Note argues that nations, in their zeal to prosecute terrorists and pursue fugitives, are trampling on the same fundamental human rights they espouse in the international forum. Part I traces the history of extradition and its safeguards. Part II analyzes problems in modern extradition law and explores the arguments for and against the development of an international standard. Part III argues that current extradition practices violate international law and proposes that an International Criminal Court be established to provide a neutral forum for extradition hearings that will protect rights established by international law. This Note concludes that extradition procedures conflict with international human rights and that only an International Criminal Court can guarantee that individual rights are respected

    Measurement of pseudorapidity distributions of charged particles in proton-proton collisions at sqrt(s) = 8 TeV by the CMS and TOTEM experiments

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    Pseudorapidity ( η\eta ) distributions of charged particles produced in proton–proton collisions at a centre-of-mass energy of 8  TeV~\text {TeV} are measured in the ranges η<2.2|\eta | < 2.2 and 5.3<η<6.45.3 < |\eta | < 6.4 covered by the CMS and TOTEM detectors, respectively. The data correspond to an integrated luminosity of L=45μb1\mathcal {L} = 45 \mu {\mathrm {b}}^{-1} . Measurements are presented for three event categories. The most inclusive category is sensitive to 91–96 % of the total inelastic proton–proton cross section. The other two categories are disjoint subsets of the inclusive sample that are either enhanced or depleted in single diffractive dissociation events. The data are compared to models used to describe high-energy hadronic interactions. None of the models considered provide a consistent description of the measured distributions
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