# PH-EP Articles

Последно добавени:
2014-09-21
18:09
 Search for neutral Higgs bosons of the minimal supersymmetric standard model in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector / ATLAS Collaboration A search for the neutral Higgs bosons predicted by the Minimal Supersymmetric Standard Model (MSSM) is reported. The analysis is performed on data from proton--proton collisions at a centre-of-mass energy of $8 TeV$ collected with the ATLAS detector at the Large Hadron Collider. [...] arXiv:1409.6064; CERN-PH-EP-2014-210.- Geneva : CERN, 2014 - 32 p. - Published in : J. High Energy Phys. 11 (2014) 056 Fulltext: PDF; Springer Open Access article: PDF; External links: Previous draft version; Preprint

2014-09-05
07:34
 Measurement of the $\chi_b(3P)$ mass and of the relative rate of $\chi_{b1}(1P)$ and $\chi_{b2}(1P)$ production / LHCb collaboration The production of $\chi_b$ mesons in proton-proton collisions is studied using a data sample collected by the LHCb detector, at centre-of-mass energies of $\sqrt{s}=7$ and $8$ TeV and corresponding to an integrated luminosity of 3.0 fb$^{-1}$. The $\chi_b$ mesons are identified through their decays to $\Upsilon(1S)\gamma$ and $\Upsilon(2S)\gamma$ using photons that converted to $e^+e^-$ pairs in the detector [...] arXiv:1409.1408; LHCB-PAPER-2014-040; CERN-PH-EP-2014-206.- Geneva : CERN, 2014 - 24 p. - Published in : J. High Energy Phys. 10 (2014) 088 Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2014-08-25
13:32
 Measurement of the total cross section from elastic scattering in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector / ATLAS Collaboration A measurement of the total $pp$ cross section at the LHC at $\sqrt{s}=7$ TeV is presented. In a special run with high-$\beta^{\star}$ beam optics, an integrated luminosity of 80 $\mu$b$^{-1}$ was accumulated in order to measure the differential elastic cross section as a function of the Mandelstam momentum transfer variable $t$ [...] arXiv:1408.5778; CERN-PH-EP-2014-177.- Geneva : CERN, 2014 - 38 p. - Published in : Nucl. Phys. B 889 (2014) 486-548 Elsevier Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint

2014-08-22
18:12
 Search for the lepton flavor violating decay $Z \rightarrow e\mu$ in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector / ATLAS Collaboration The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process $Z \rightarrow e\mu$ in $pp$ collisions using $20.3~\textrm{fb}^{-1}$ of data collected at $\sqrt{s}= 8~\textrm{TeV}$. An enhancement in the $e\mu$ invariant mass spectrum is searched for at the $Z$ boson mass. [...] arXiv:1408.5774; CERN-PH-EP-2014-195.- Geneva : CERN, 2014 - 6 p. - Published in : Phys. Rev. D 90 (2014) 072010 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint

2014-08-14
20:50
 Search for neutral MSSM Higgs bosons decaying to a pair of tau leptons in pp collisions / CMS Collaboration A search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model (MSSM) decaying to tau-lepton pairs in pp collisions is performed, using events recorded by the CMS experiment at the LHC. The dataset corresponds to an integrated luminosity of 24.6 fb$^{-1}$, with 4.9 fb$^{-1}$ at 7 TeV and 19.7 fb$^{-1}$ at 8 TeV. [...] arXiv:1408.3316; CMS-HIG-13-021; CERN-PH-EP-2014-192.- Geneva : CERN, 2014 - 53 p. - Published in : J. High Energy Phys. 10 (2014) 160 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint

2014-08-13
17:03
 Measurement of the CKM angle $\gamma$ using $B^\pm \to D K^\pm$ with $D \to K^0_{\rm S} \pi^+\pi^-, K^0_{\rm S} K^+ K^-$ decays / LHCb Collaboration A binned Dalitz plot analysis of $B^\pm \to D K^\pm$ decays, with $D \to K^0_{\rm S} \pi^+\pi^-$ and $D \to K^0_{\rm S} K^+ K^-$, is performed to measure the $C\!P$-violating observables $x_{\pm}$ and $y_{\pm}$, which are sensitive to the Cabibbo-Kobayashi-Maskawa angle $\gamma$. The analysis exploits a sample of proton-proton collision data corresponding to 3.0 fb$^{-1}$ collected by the LHCb experiment. [...] arXiv:1408.2748; LHCB-PAPER-2014-041; CERN-PH-EP-2014-202.- Geneva : CERN, 2014 - 35 p. - Published in : J. High Energy Phys. 10 (2014) 097 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2014-08-08
09:03
 Search for the associated production of the Higgs boson with a top-quark pair / CMS Collaboration A search for the standard model Higgs boson produced in association with a top-quark pair ($t\bar{t}$H) is presented, using data samples corresponding to integrated luminosities of up to 5.1 fb$^{-1}$ and 19.7 fb$^{-1}$ collected in pp collisions at center-of-mass energies of 7 TeV and 8 TeV respectively. The search is based on the following signatures of the Higgs boson decay: H $\to$ hadrons, H $\to$ photons, and H $\to$ leptons. [...] arXiv:1408.1682; CMS-HIG-13-029; CERN-PH-EP-2014-189.- Geneva : CERN, 2014 - 61 p. - Published in : J. High Energy Phys. 09 (2014) 087 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint

2014-08-07
09:53
 First observations of the rare decays $B^+\!\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and $B^+\!\rightarrow\phi K^+\mu^+\mu^-$ / LHCb collaboration First observations of the rare decays $B^+\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and $B^+\rightarrow \phi K^+\mu^+\mu^-$ are presented using data corresponding to an integrated luminosity of $3.0\,\mbox{fb}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of $7$ and $8\mathrm{\,TeV}$. The branching fractions of the decays are \begin{eqnarray*} \mathcal{B}(B^+\rightarrow K^+\pi^+\pi^-\mu^+\mu^-) &=& (4.36\,^{+0.29}_{-0.27}\,\mathrm{(stat)}\pm 0.21\,\mathrm{(syst)}\pm0.18\,\mathrm{(norm)})\times10^{-7},\\ \mathcal{B}(B^+\rightarrow\phi K^+\mu^+\mu^-) &=& (0.82 \,^{+0.19}_{-0.17}\,\mathrm{(stat)}\,^{+0.10}_{-0.04}\,\mathrm{(syst)}\pm0.27\,\mathrm{(norm)}) \times10^{-7},\end{eqnarray*} where the uncertainties are statistical, systematic, and due to the uncertainty on the branching fractions of the normalisation modes. [...] arXiv:1408.1137; LHCB-PAPER-2014-030; CERN-PH-EP-2014-193.- Geneva : CERN, 2014 - 20 p. - Published in : J. High Energy Phys. 10 (2014) 064 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2014-08-06
04:10
 Measurement of $C\!P$ asymmetries in the decays $B^0 \rightarrow K^{*0} \mu^+ \mu^-$ and $B^+ \rightarrow K^{+} \mu^+ \mu^-$ / LHCb collaboration The direct $C\!P$ asymmetries of the decays $B^0 \rightarrow K^{*0} \mu^+ \mu^-$ and $B^+ \rightarrow K^{+} \mu^+ \mu^-$ are measured using $pp$ collision data corresponding to an integrated luminosity of 3.0$\mbox{fb}^{-1}$ collected with the LHCb detector. The respective control modes $B^0 \rightarrow J/\psi K^{*0}$ and $B^+ \rightarrow J/\psi K^{+}$ are used to account for detection and production asymmetries. [...] arXiv:1408.0978; CERN-PH-EP-2014-191; LHCB-PAPER-2014-032.- Geneva : CERN, 2014 - 19 p. - Published in : J. High Energy Phys. 09 (2014) 177 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2014-07-28
17:36
 Search for new particles in events with one lepton and missing transverse momentum in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector / ATLAS Collaboration This paper presents a search for new particles in events with one lepton (electron or muon) and missing transverse momentum using 20.3~$fb^{-1}$ of proton-proton collision data at $\sqrt{s}=8$ TeV recorded by the ATLAS experiment at the Large Hadron Collider. No significant excess beyond Standard Model expectations is observed. [...] arXiv:1407.7494; CERN-PH-EP-2014-139.- Geneva : CERN, 2014 - 28 p. - Published in : J. High Energy Phys. 09 (2014) 037 Fulltext: PDF; Springer Open Access article: PDF; External links: Previous draft version; Preprint