# PH-EP Articles

Последние добавления:
2013-09-05
04:14
 Measurement of the production cross section for $Z\gamma \to \nu\bar{\nu}\gamma$ in pp collisions at $\sqrt{s}$ = 7 TeV and limits on $ZZ\gamma$ and $Z\gamma\gamma$ triple gauge boson couplings / CMS Collaboration A measurement of the $Z\gamma \to \nu\bar{\nu}\gamma$ cross section in pp collisions at $\sqrt{s}$ = 7 TeV is presented, using data corresponding to an integrated luminosity of 5.0 inverse femtobarns collected with the CMS detector. This measurement is based on the observation of events with an imbalance of transverse energy in excess of 130 GeV and a single photon in the absolute pseudorapidity range |$\eta$| < 1.4 with transverse energy above 145 GeV. [...] arXiv:1309.1117; CMS-SMP-12-020; CERN-PH-EP-2013-098.- Geneva : CERN, 2013 - 29 p. - Published in : J. High Energy Phys. 10 (2013) 164 Springer Open Access article: PDF; External link: Preprint

2013-09-01
20:41
 Search for a new bottomonium state decaying to $\Upsilon(1S)\pi^+ \pi^-$ in pp collisions at $\sqrt{s}$ = 8 TeV / CMS Collaboration The results of a search for the bottomonium counterpart, denoted as $X_b$, of the exotic charmonium state X(3872) is presented. The analysis is based on a sample of pp collisions at $\sqrt{s}$ = 8 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 20.7 inverse femtobarns. [...] arXiv:1309.0250; CMS-BPH-11-016; CERN-PH-EP-2013-157.- Geneva : CERN, 2013 - 27 p. - Published in : Phys. Lett. B 727 (2013) 57-76 Elsevier Open Access article: PDF; External link: Preprint

2013-08-28
04:09
 First observation of $\overline{B}^0 \rightarrow J/\psi K^{+}K^{-}$ and search for $\overline{B}^0 \rightarrow J/\psi \phi$ decays / LHCb collaboration The first observation of the $\overline{B}^0 \rightarrow J/\psi K^{+}K^{-}$ decay is presented with a data sample corresponding to an integrated luminosity of 1.0 $\rm fb^{-1}$ of $pp$ collisions at a center-of-mass energy of 7 TeV collected with the LHCb detector. The branching fraction is measured to be $\mathcal{B}(\overline{B}^0 \rightarrow J/\psi K^{+}K^{-}) = (2.53\pm 0.31 \pm 0.19)\times 10^{-6}$, where the first uncertainty is statistical and the second is systematic. [...] arXiv:1308.5916; CERN-PH-EP-2013-159; LHCB-PAPER-2013-045.- Geneva : CERN, 2013 - 22 p. - Published in : Phys. Rev. D 88 (2013) 072005 APS Open Access article: PDF; Fulltext: ZIP; External link: Preprint

2013-08-22
04:23
 Observation of the decay $B_c^+ \to B_s^0 \pi^+$ / LHCb collaboration The result of a search for the decay $B_c^+ \to B_s^0 \pi^+$ is presented, using the $B_s^0 \to D_s^- \pi^+$ and $B_s^0 \to J/\psi \phi$ channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb$^{-1}$ taken at a center-of-mass energy of 7 TeV, and 2 fb$^{-1}$ taken at 8 TeV. [...] arXiv:1308.4544; CERN-PH-EP-2013-136; LHCB-PAPER-2013-044.- Geneva : CERN, 2013 - 16 p. - Published in : Phys. Rev. Lett. 111 (2013) 181801 APS Open Access article: PDF; Related data file(s): ZIP; External link: Preprint

2013-08-19
15:03
 Search for Microscopic Black Holes in a Like-sign Dimuon Final State using large Track Multiplicity with the ATLAS detector / ATLAS Collaboration A search for microscopic black holes in a like-sign dimuon final state in proton−proton collisions at √s = 8 TeV is presented. The data were collected with the ATLAS detector at the Large Hadron Collider in 2012 and correspond to an integrated luminosity of 20.3 fb$^{-1}$. [...] arXiv:1308.4075; CERN-PH-EP-2013-120.- Geneva : CERN, 2013 - 10 p. - Published in : Phys. Rev. D 88 (2013) 072001 APS Open Access article: PDF; External links: Previous draft version; Preprint

2013-08-19
07:46
 Measurement of the W-boson helicity in top-quark decays from $t\bar{t}$ production in lepton+jets events in pp collisions at $\sqrt{s}$=7 TeV / CMS Collaboration The W-boson helicity fractions in top-quark decays are measured with $t\bar{t}$ events in the lepton+jets final state, using proton-proton collisions at a centre-of-mass energy of 7 TeV, collected in 2011 with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 5.0 inverse femtobarns. [...] arXiv:1308.3879; CMS-TOP-11-020; CERN-PH-EP-2013-133.- Geneva : CERN, 2013 - 41 p. - Published in : J. High Energy Phys. 10 (2013) 167 Springer Open Access article: PDF; External link: Preprint

2013-08-15
16:35
 Angular analysis and branching fraction measurement of the decay $B^0 \to K^{*0} \mu^+\mu^-$ / CMS Collaboration The angular distributions and the differential branching fraction of the decay $B^0 \to K^*(892)^0 \mu^+ \mu^-$ are studied using a data sample corresponding to an integrated luminosity of 5.2 inverse femtobarns collected with the CMS detector at the LHC in pp collisions at $\sqrt{s}$ = 7 TeV. From more than 400 signal decays, the forward-backward asymmetry of the muons, the $K^*(892)^0$ longitudinal polarization fraction, and the differential branching fraction are determined as a function of the square of the dimuon invariant mass. [...] arXiv:1308.3409; CMS-BPH-11-009; CERN-PH-EP-2013-152.- Geneva : CERN, 2013 - 33 p. - Published in : Phys. Lett. B 727 (2013) 77-100 Elsevier Open Access article: PDF; External link: Preprint

2013-08-15
07:20
 Model-independent search for $CP$ violation in $D^{0} \to K^{-}K^{+}\pi^{-}\pi^{+}$ and $D^{0} \to \pi^{-}\pi^{+}\pi^{+}\pi^{-}$ decays / LHCb collaboration A search for $CP$ violation in the phase-space structures of $D^{0}$ and $\bar{D^{0}}$ decays to the final states $K^{-}K^{+}\pi^{-}\pi^{+}$ and $\pi^{-}\pi^{+}\pi^{+}\pi^{-}$ is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0 fb$^{−1}$ collected in 2011 by the LHCb experiment in $pp$ collisions at a centre-of-mass energy of 7 TeV. [...] arXiv:1308.3189; CERN-PH-EP-2013-151; LHCB-PAPER-2013-041.- Geneva : CERN, 2013 - 13 p. - Published in : Phys. Lett. B 726 (2013) 623-633 Elsevier Open Access article: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

2013-08-09
04:19
 Measurement of form-factor independent observables in the decay $B^{0} \to K^{*0} \mu^+ \mu^-$ / LHCb collaboration We present a measurement of form-factor independent angular observables in the decay $B^0\to K^{*}(892)^{0}\mu^+ \mu^-$. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb experiment in $pp$ collisions at a center-of-mass energy of 7TeV. [...] arXiv:1308.1707; LHCB-PAPER-2013-037; CERN-PH-EP-2013-146.- Geneva : CERN, 2013 - 14 p. - Published in : Phys. Rev. Lett. 111 (2013) 191801 APS Open Access article: PDF; Related data file(s): ZIP; External link: Preprint

2013-08-08
13:34
 Search for new phenomena in final states with large jet multiplicities and missing transverse momentum at √s = 8 TeV proton-proton collisions using the ATLAS experiment / ATLAS Collaboration A search is presented for new particles decaying to large numbers (7 or more) of jets, with missing transverse momentum and no isolated electrons or muons. This analysis uses 20.3 fb$^{-1}$ of pp collision data at √s = 8 TeV collected by the ATLAS experiment at the Large Hadron Collider. [...] arXiv:1308.1841; CERN-PH-EP-2013-110.- Geneva : CERN, 2013 - 60 p. - Published in : J. High Energy Phys. 10 (2013) 130 Springer Open Access article: PDF; External links: Previous draft version; Preprint