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Full-Text Articles in Physics
Measurement Of B Hadron Lifetimes In Pp Collisions At √S = 8 Tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin S. Roy, Francisco Yumiceva, The Cms Collaboration
Measurement Of B Hadron Lifetimes In Pp Collisions At √S = 8 Tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin S. Roy, Francisco Yumiceva, The Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
Measurements are presented of the lifetimes of the B ⁰, Bs0, Λb0, and Bc+ hadrons using the decay channels B0→J/ψK∗(892)0, B0→J/ψKS0, Bs0→J/ψπ+π-, Bs0→J/ψϕ(1020), Λb0→J/ψΛ0, and Bc+→J/ψπ+. The data sample, corresponding to an integrated luminosity of 19.7fb-1, was collected by the CMS detector at the LHC in proton–proton collisions at s=8TeV. The B 0 lifetime is measured to be 453.0±1.6(stat)±1.8(syst)μm in J / ψK ∗(892) 0and 457.8±2.7(stat)±2.8(syst)μm in J/ψKS0, which results in a combined measurement of cτB0=454.1±1.4(stat)±1.7(syst)μm. The effective lifetime of the Bs0 meson is measured in two decay modes, with contributions from different amounts of the heavy and light eigenstates. …
Synthesizing Broadband Propagation-Invariant Space-Time Wave Packets Using Transmissive Phase Plates, H. Esat Kondakci, Murat Yessenov, Monjurul Feeroz Meem, Danielle Reyes, Daniel J. Thui, Shermineh Rostami Fairchild, Martin C. Richardson, Rajesh Menon, Ayman F. Abouraddy
Synthesizing Broadband Propagation-Invariant Space-Time Wave Packets Using Transmissive Phase Plates, H. Esat Kondakci, Murat Yessenov, Monjurul Feeroz Meem, Danielle Reyes, Daniel J. Thui, Shermineh Rostami Fairchild, Martin C. Richardson, Rajesh Menon, Ayman F. Abouraddy
Aerospace, Physics, and Space Science Faculty Publications
Space-time wave packets are a class of pulsed optical beams that are di raction-free and dispersion-free in free space by virtue of introducing a tight correlation between the spatial and temporal degrees of freedom of the field. Such wave packets have been recently synthesized in a novel configuration that makes use of a spatial light modulator to realize the required spatio-temporal correlations. This arrangement combines pulse-modulation and beam-shaping to assign one spatial frequency to each wavelength according to a prescribed correlation function. Relying on a spatial light modulator results in several limitations by virtue of their pixelation, small area, and …
Search For A Heavy Right-Handed W Boson And A Heavy Neutrino In Events With Two Same-Flavor Leptons And Two Jets At S√=13 Tev, The Cms Collaboration, A. M. Sirunyan, A. Tumasyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin Roy, Francisco Yumiceva
Search For A Heavy Right-Handed W Boson And A Heavy Neutrino In Events With Two Same-Flavor Leptons And Two Jets At S√=13 Tev, The Cms Collaboration, A. M. Sirunyan, A. Tumasyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin Roy, Francisco Yumiceva
Aerospace, Physics, and Space Science Faculty Publications
A search for a heavy right-handed W boson (WR) decaying to a heavy right-handed neutrino and a charged lepton in events with two same-flavor leptons (e or μ) and two jets, is presented. The analysis is based on proton-proton collision data, collected by the CMS Collaboration at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1. No significant excess above the standard model expectation is seen in the invariant mass distribution of the dilepton plus dijet system. Assuming that couplings are identical to those of the standard model, and that only one heavy neutrino flavor NR …
Measurement Of Associated Z + Charm Production In Proton–Proton Collisions At √S=8tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin Roy, Francisco Yumiceva, The Cms Collaboration
Measurement Of Associated Z + Charm Production In Proton–Proton Collisions At √S=8tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin Roy, Francisco Yumiceva, The Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
A study of the associated production of a Z boson and a charm quark jet (Z + c), and a comparison to production with a b quark jet (Z + b), in p p collisions at a centre-of-mass energy of 8TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7fb-1, collected with the CMS detector at the CERN LHC. The Z boson candidates are identified through their decays into pairs of electrons or muons. Jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays …
Search For New Physics In Events With A Leptonically Decaying Z Boson And A Large Transverse Momentum Imbalance In Proton–Proton Collisions At √S = 13 Tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin S. Roy, F. Yumiceva, The Cms Collaboration
Search For New Physics In Events With A Leptonically Decaying Z Boson And A Large Transverse Momentum Imbalance In Proton–Proton Collisions At √S = 13 Tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin S. Roy, F. Yumiceva, The Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
A search for new physics in events with a Z boson produced in association with large missing transverse momentum at the LHC is presented. The search is based on the 2016 data sample of proton-proton collisions recorded with the CMS experiment at s=13TeV, corresponding to an integrated luminosity of 35.9fb-1. The results of this search are interpreted in terms of a simplified model of dark matter production via spin-0 or spin-1 mediators, a scenario with a standard-model-like Higgs boson produced in association with the Z boson and decaying invisibly, a model of unparticle production, and a model with large extra …
A Novel Application Of Fiber Bragg Grating (Fbg) Sensors In Mpgd, Duccio Abbaneo, Vallary Bhopatkar, Marcus Hohlmann, Ajit K. Mohapatra, Aiwu Zhang
A Novel Application Of Fiber Bragg Grating (Fbg) Sensors In Mpgd, Duccio Abbaneo, Vallary Bhopatkar, Marcus Hohlmann, Ajit K. Mohapatra, Aiwu Zhang
Aerospace, Physics, and Space Science Faculty Publications
We present a novel application of Fiber Bragg Grating (FBG) sensors in the construction and characterisation of Micro Pattern Gaseous Detector (MPGD), with particular attention to the realisation of the largest triple (Gas electron Multiplier) GEM chambers so far operated, the GE1/1 chambers of the CMS experiment at LHC. The GE1/1 CMS project consists of 144 GEM chambers of about 0.5 m² active area each, employing three GEM foils per chamber, to be installed in the forward region of the CMS endcap during the long shutdown of LHC in 2108-2019. The large active area of each GE1/1 chamber consists of …
Azimuthal Anisotropy Of Charged Particles With Transverse Momentum Up To 100 Gev/C In Pbpb Collisions At Snn=5.02 Tev, M M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, M Hohlmann, D Noonan, Tuhin S. Roy, Francisco X. Yumiceva, Cms Collaboration
Azimuthal Anisotropy Of Charged Particles With Transverse Momentum Up To 100 Gev/C In Pbpb Collisions At Snn=5.02 Tev, M M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, M Hohlmann, D Noonan, Tuhin S. Roy, Francisco X. Yumiceva, Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
The Fourier coefficients v2 and v3 characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at sNN=5.02 TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 110 GeV/c range, where anisotropic azimuthal distributions should reflect the path-length dependence of parton energy loss in the created medium. Results are presented in several bins of PbPb collision centrality, spanning the 60% most central events. The v2 coefficient is measured with the scalar product and the multiparticle cumulant methods, which have different sensitivities to initial-state fluctuations. The values from …
Measurement Of Prompt And Nonprompt Charmonium Suppression In Pbpb Collisions At 5.02 Tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin S. Roy, F. Yumiceva, The Cms Collaboration
Measurement Of Prompt And Nonprompt Charmonium Suppression In Pbpb Collisions At 5.02 Tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin S. Roy, F. Yumiceva, The Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
The nuclear modification factors of J / ψ and ψ(2S) mesons are measured in PbPb collisions at a centre-of-mass energy per nucleon pair of sNN=5.02TeV. The analysis is based on PbPb and p p data samples collected by CMS at the LHC in 2015, corresponding to integrated luminosities of 464μb-1 and 28pb-1, respectively. The measurements are performed in the dimuon rapidity range of | y| < 2.4 as a function of centrality, rapidity, and transverse momentum (pT) from pT= 3 GeV/c in the most forward region and up to 50GeV/c. Both prompt and nonprompt (coming from b hadron decays) J / ψ mesons are observed to be increasingly suppressed with centrality, with a magnitude similar to the one observed at sNN=2.76TeV for the two J / ψ meson components. No dependence on rapidity is observed for either prompt or nonprompt J / ψ mesons. An indication of a lower prompt J / ψ meson suppression at pT> 25 GeV/c is seen with respect to that observed at intermediate pT. The prompt ψ(2S) meson yield is found to be more suppressed than that of the prompt J / ψ mesons in the entire …
Search For Standard Model Production Of Four Top Quarks With Same-Sign And Multilepton Final States In Proton–Proton Collisions At √S=13tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin S. Roy, F. Yumiceva, The Cms Collaboration
Search For Standard Model Production Of Four Top Quarks With Same-Sign And Multilepton Final States In Proton–Proton Collisions At √S=13tev, A. M. Sirunyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, Tuhin S. Roy, F. Yumiceva, The Cms Collaboration
Aerospace, Physics, and Space Science Faculty Publications
A search for standard model production of four top quarks (t t ¯ t t ¯) is reported using events containing at least three leptons (e , μ) or a same-sign lepton pair. The events are produced in proton–proton collisions at a center-of-mass energy of 13TeV at the LHC, and the data sample, recorded in 2016, corresponds to an integrated luminosity of 35.9fb-1. Jet multiplicity and flavor are used to enhance signal sensitivity, and dedicated control regions are used to constrain the dominant backgrounds. The observed and expected signal significances are, respectively, 1.6 and 1.0 standard deviations, and the t …
Erratum 2: Search For Dark Matter And Unparticles In Events With A Z Boson And Missing Transverse Momentum In Proton-Proton Collisions At S√=13 Tev, The Cms Collaboration, A. M. Sirunyan, A. Tumasyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, T. Roy, Francisco Yumiceva
Erratum 2: Search For Dark Matter And Unparticles In Events With A Z Boson And Missing Transverse Momentum In Proton-Proton Collisions At S√=13 Tev, The Cms Collaboration, A. M. Sirunyan, A. Tumasyan, Marc M. Baarmand, Vallary Bhopatkar, Stefano Colafranceschi, Marcus Hohlmann, Daniel Noonan, T. Roy, Francisco Yumiceva
Aerospace, Physics, and Space Science Faculty Publications
In the original paper, figure 10 was incorrect. The correct figgure is shown below. Additionally, the unparticle entries in table 3, as well as figure 4 and 5 were labelled with incorrect values of AU. The entries correctly correspond to AU = 1TeV.