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The charged particle transverse momentum (p T) spectra are presented for pp collisions at \( \sqrt {s} = 0.9 \) and 7 TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231... more
The charged particle transverse momentum (p T) spectra are presented for pp collisions at \( \sqrt {s} = 0.9 \) and 7 TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231 μb−1 and 2.96 pb−1, respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-p T measurements. The results are compared with leading and next-to-leading order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable \( {x_{\text{T}}} \equiv {{{2{p_{\text{T}}}}} \left/ {{\sqrt {s} }} \right.} \) over the p T range up to 200 GeV/c. Using a combination of x T scaling and direct interpolation at fixed p T, a reference transverse momentum spectrum at \( \sqrt {s} = 2.76 \) TeV is constructed, which can be used for studying high-p T particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy.
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... means are consistent with the muon minimum ionizing signals measured for segments of the calorimeters in test beams [4, 6], without magnetic field, for a wide momen-tum range after taking into account magnetic field effects,... more
... means are consistent with the muon minimum ionizing signals measured for segments of the calorimeters in test beams [4, 6], without magnetic field, for a wide momen-tum range after taking into account magnetic field effects, correcting the signal for the muon path length and ...
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Page 1. Performance of the CMS drift-tube chamber local trigger with cosmic rays This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2010 JINST 5 T03003... more
Page 1. Performance of the CMS drift-tube chamber local trigger with cosmic rays This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2010 JINST 5 T03003 (http://iopscience.iop.org/1748-0221/5/03/T03003) ...
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Page 1. Performance and operation of the CMS electromagnetic calorimeter This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2010 JINST 5 T03010... more
Page 1. Performance and operation of the CMS electromagnetic calorimeter This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2010 JINST 5 T03010 (http://iopscience.iop.org/1748-0221/5/03/T03010) ...
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Commissioning studies of the CMS hadron calorimeter have identified sporadic uncharacteristic noise and a small number of malfunctioning calorimeter channels. Algorithms have been developed to identify and address these problems in the... more
Commissioning studies of the CMS hadron calorimeter have identified sporadic uncharacteristic noise and a small number of malfunctioning calorimeter channels. Algorithms have been developed to identify and address these problems in the data. The methods have been tested ...
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Page 1. Commissioning of the CMS High-Level Trigger with cosmic rays This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2010 JINST 5 T03005 (http://iopscience.iop.org/1748-0221/5/03/T03005)... more
Page 1. Commissioning of the CMS High-Level Trigger with cosmic rays This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2010 JINST 5 T03005 (http://iopscience.iop.org/1748-0221/5/03/T03005) ...
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... THOM, J; VAUGHAN, J; WENG, Y; WITTICH, P; BEETZ, C; CIRINO, G; SANZENI, C; WINN, D; ABDULLIN, S; AFAQ, M; ALBROW ... SMITH, K; STRANG, M; ALVERSON, G; BARBERIS, E; BOERIU, O; EULISSE, G; GOVI, G; MCCAULEY, T; MUSIENKO, Y; MUZAFFAR, S;... more
... THOM, J; VAUGHAN, J; WENG, Y; WITTICH, P; BEETZ, C; CIRINO, G; SANZENI, C; WINN, D; ABDULLIN, S; AFAQ, M; ALBROW ... SMITH, K; STRANG, M; ALVERSON, G; BARBERIS, E; BOERIU, O; EULISSE, G; GOVI, G; MCCAULEY, T; MUSIENKO, Y; MUZAFFAR, S; OSBORNE ...
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Page 1. Commissioning and performance of the CMS pixel tracker with cosmic ray muons This article has been downloaded from IOPscience. ... Commissioning and performance of the CMS pixel tracker with cosmic ray muons CMS Collaboration ...
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Abstract The CMS silicon tracker, consisting of 1440 silicon pixel and 15 148 silicon strip detector modules, has been aligned using more than three million cosmic ray charged particles, with additional information from optical surveys.... more
Abstract The CMS silicon tracker, consisting of 1440 silicon pixel and 15 148 silicon strip detector modules, has been aligned using more than three million cosmic ray charged particles, with additional information from optical surveys. The positions of the modules ...
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A search for the standard model Higgs boson decaying into two Z bosons with subsequent decay into a final state containing two quark jets and two leptons, $H \to ZZ^{(*)} \to q\bar{q}l^-l^+$ is presented. Results are based on data... more
A search for the standard model Higgs boson decaying into two Z bosons with subsequent decay into a final state containing two quark jets and two leptons, $H \to ZZ^{(*)} \to q\bar{q}l^-l^+$ is presented. Results are based on data corresponding to an integrated luminosity of 4.6 inverse femtobarns of proton-proton collisions at $\sqrt{s}$=7 TeV, collected with the CMS detector at
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Page 1. EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH (CERN) CERN-PH-EP/ 2011-002 2011/03/08 CMS-EXO-10-013 Search for Resonances in the Dilepton Mass Distribution in pp Collisions at √ s = 7 TeV The CMS Collaboration ∗ Abstract ...
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A measurement of the angular correlations between beauty and anti-beauty hadrons () produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular... more
A measurement of the angular correlations between beauty and anti-beauty hadrons () produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation
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