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Selection of Single Top Events with the CMS Detector at LHC
/ Abramov, Victor ; Konstantinov, Dmitri ; Slabospitsky, Sergey ; Najafabadi, M Mohammadi ; Giammanco, Andrea ; Tenchini, Roberto ; Boos, Edouard ; Dudko, Lev ; Savrin, Viktor ; Sherstnev, Alexander et al.
The detection of single-top events with CMS is discussed. Two selections are proposed, aimed to measure single top production in the Standard Model t- and s-channel, respectively. [...]
CMS-NOTE-2006-084.-
Geneva : CERN, 2006 - 19 p.
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Study of PDF and QCD Scale Uncertainties in $pp \to ZZ \to 4\mu$ Events at the LHC
/ Abdullin, Salavat ; Bartalini, Paolo ; Cavanaugh, Richard ; Drozdetsky, A A ; Korytov, Andrey ; Mitselmakher, Guenakh ; Pakhotin, Yuriy ; Scurlock, Bobby ; Sherstnev, Alexander ; Stenzel, H
Theoretical uncertainties from Parton Distribution Functions and from hard scattering scale are studied for the qqbar -> ZZ -> 4mu process, the main irreducible background in searches for the Higgs boson via its H -> ZZ -> 4mu decay mode. Effects are quoted for both total and differential cross sections, investigating the distributions used in pp -> H -> 4mu search. [...]
CMS-NOTE-2006-068.-
Geneva : CERN, 2006 - 11 p.
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Relative Contributions of t- and s-Channels to the ZZ -> 4mu Process
/ Abdullin, Salavat ; Acosta, Darin ; Bartalini, Paolo ; Cavanaugh, Richard ; Drozdetsky, A A ; Korytov, Andrey ; Mitselmakher, Guenakh ; Pakhotin, Yuriy ; Scurlock, Bobby ; Sherstnev, Alexander
We show that the s-channel contribution to the qqbar{q} rightarrow ZZ rightarrow 4mu process, the main irreducible background in searches for the Higgs boson via its rm H rightarrow ZZ rightarrow 4\mu }$ decay mode, not available in the PYTHIA event generator, can add as much as sim 15% to the cross section arising from the commonly considered t-channel process. Moreover, the s-channel contribution has very different kinematics and cannot be taken into account by introducing an overall scaling K-factor. [...]
CMS-NOTE-2006-057.-
Geneva : CERN, 2006 - 7 p.
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Sensitivity of the Muon Isolation Cut Efficiency to the Underlying Event Uncertainties
/ Abdullin, Salavat ; Acosta, Darin ; Bartalini, Paolo ; Cavanaugh, Richard ; Drozdetsky, A A ; Korytov, Andrey ; Mitselmakher, Guenakh ; Pakhotin, Yuriy ; Scurlock, Bobby ; Sherstnev, Alexander
In the context of the rm H rightarrow ZZ rightarrow 4mu analysis, uncertainties in predicting the muon isolation cut efficiency are studied by varying the PYTHIA parameters responsible for simulation of the underlying event. The processes considered are rm H rightarrow ZZ rightarrow 4mu, rm ZZ rightarrow 4mu, and rm tbar {t} rightarrow 4mu + X. [...]
CMS-NOTE-2006-033.-
Geneva : CERN, 2006 - 11 p.
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Search Strategy for the Standard Model Higgs Boson in the $H \to ZZ^{(*)} \to 4\mu$ Decay Channel using $M(4\mu)$-Dependent Cuts
/ Abdullin, Salavat (Fermi National Laboratory, Chicago, IL, USA) ; Acosta, Darin (Univ. Florida, Gainesville, FL, USA) ; Bartalini, Paolo (Univ. Florida, Gainesville, FL, USA) ; Cavanaugh, Richard (Univ. Florida, Gainesville, FL, USA) ; Drozdetsky, A AN (Univ. Florida, Gainesville, FL, USA) ; Korytov, Andrey (Univ. Florida, Gainesville, FL, USA) ; Mitselmakher, Guenakh (Univ. Florida, Gainesville, FL, USA) ; Pakhotin, Yuriy (Univ. Florida, Gainesville, FL, USA) ; Scurlock, Bobby (Univ. Florida, Gainesville, FL, USA) ; Sherstnev, Alexander (Cavendish Laboratory, Univ. Cambridge, UK)
We present a strategy for a Higgs-boson search in its four-muon decay channel Hmu. The method is based on using optimized, smooth M(4mu)-dependent cuts that automatically ensure an optimal signal-to-background ratio for any mass at which the Higgs boson might appear. [...]
CMS-NOTE-2006-122.-
Geneva : CERN, 2007 - 26 p.
- Published in : Acta Phys. Pol. B 38 (2007) 731-738
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Tracker Operation and Performance at the Magnet Test and Cosmic Challenge
/ Abbaneo, Duccio (CERN) ; Albergo, Sebastiano ; Ambroglini, Filippo ; Azzi, Patrizia ; Bogelsbacher, F ; Bacchetta, Nicola ; Bainbridge, Robert ; Barvich, Tobias ; Basti, Andrea ; Beaulieu, G et al.
During summer 2006 a fraction of the CMS silicon strip tracker was operated in a comprehensive slice test called the Magnet Test and Cosmic Challenge (MTCC). At the MTCC, cosmic rays detected in the muon chambers were used to trigger the readout of all CMS sub-detectors in the general data acquisition system and in the presence of the 4 T magnetic field produced by the CMS superconducting solenoid. [...]
CMS-NOTE-2007-029.-
Geneva : CERN, 2007 - 52 p.
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Design, Performance, and Calibration of CMS Hadron Endcap Calorimeters
/ CMS HCAL Collaboration
Detailed measurements have been made with the CMS hadron calorimeter endcaps (HE) in response to beams of muons, electrons, and pions. Readout of HE with custom electronics and hybrid photodiodes (HPDs) shows no change of performance compared to readout with commercial electronics and photomultipliers. [...]
CMS-NOTE-2008-010.-
Geneva : CERN, 2008 - 36 p.
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Potential to Discover Supersymmetry in Events with Muons, Jets and Missing Energy in pp Collisions at $\sqrt{s}$ = 14 TeV with the CMS Detector
/ Pakhotin, Yuriy ; Scurlock, Bobby ; Acosta, Darin ; Bartalini, Paolo ; Cavanaugh, Richard ; Drozdetsky, A A ; Korytov, Andrey ; Kotov, Khristian ; Matchev, Konstantin ; Mitselmakher, Guenakh et al.
Generic signatures of supersymmetry with R-Parity conservation include those of single isolated muons or like-sign isolated dimuon pairs, accompanied with energetic jets and missing transverse energy. The ability of CMS to discover supersymmetry with these signals is estimated for 10 fb^-1 of collected data with the inclusive single- and di-muon High Level Trigger paths. [...]
CMS-NOTE-2006-134.-
Geneva : CERN, 2006 - 26 p.
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