# CERN Preprints

2014-08-22
18:12
 Search for the lepton flavor violating decay $Z \rightarrow e\mu$ in $pp$ collisions at $\sqrt{s} = 8~\textrm{TeV}$ with the ATLAS detector 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 $\sqrt{s}= 8~\textrm{TeV}$. [...] CERN-PH-EP-2014-195. - 2014. Fulltext - Previous draft version

2014-08-22
10:14
 On the Flavor Structure of Natural Composite Higgs Models & Top Flavor Violation / Azatov, Aleksandr ; Panico, Giuliano ; Perez, Gilad ; Soreq, Yotam We explore the up flavor structure of composite pseudo Nambu-Goldstone-boson Higgs models, where we focus on the flavor anarchic minimal $SO(5)$ case. [...] arXiv:1408.4525 ; CERN-PH-TH-2014-159. - 2014. - 23 p. Preprint - Full text

2014-08-22
10:13
 The chiral phase transition in two-flavor QCD from imaginary chemical potential / Bonati, Claudio ; de Forcrand, Philippe ; D'Elia, Massimo ; Philipsen, Owe ; Sanfilippo, Francesco We investigate the order of the finite temperature chiral symmetry restoration transition for QCD with two massless fermions, by using a novel method, based on simulating imaginary values of the quark chemical potential $\mu=i\mu_i,\mu_i\in\mathbb{R}$. [...] arXiv:1408.5086 ; CERN-PH-TH-2014-158 ; IFUP-TH-2014-8. - 2014. - 8 p. Preprint - Full text

2014-08-22
08:26
 Dark matter direct detection constraints from gauge bosons loops / Crivellin, Andreas ; Haisch, Ulrich While many interactions of dark matter (DM) with the standard model (SM) affect direct detection and LHC searches, there are only a few operators generating annihilation of DM into photons. [...] arXiv:1408.5046 ; CERN-PH-TH-2014-147. - 2014. - 7 p. Preprint - Full text

2014-08-22
08:25
 EFT Beyond the Horizon: Stochastic Inflation and How Primordial Quantum Fluctuations Go Classical / Burgess, C P ; Holman, R ; Tasinato, G ; Williams, M We identify the effective theory describing inflationary super-Hubble scales and show it to be a special case of effective field theories appropriate to open systems. [...] arXiv:1408.5002 ; CERN-PH-TH-2014-142. - 2014. - 25 p. Preprint - Full text

2014-08-22
08:24
 Magnetization of fluid phonons and large-scale curvature perturbations / Giovannini, Massimo The quasinormal mode of a gravitating and magnetized fluid in a spatially flat, isotropic and homogeneous cosmological background is derived in the presence of the fluid sources of anisotropic stress and of the entropic fluctuations of the plasma. [...] arXiv:1408.4620 ; CERN-PH-TH-2014-119. - 2014. - 30 p. Preprint - Full text

2014-08-21
20:27
 Measurements of Higgs boson production and couplings in the four-lepton channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector The final ATLAS Run 1 measurements of Higgs boson production and couplings in the decay channel $H\to ZZ^{*}\to\ell^+\ell^-\ell^{'+}\ell^{'-}$, where $\ell,\ell^{'}=e$ or $\mu$, are presented. [...] CERN-PH-EP-2014-170. - 2014. Fulltext - Previous draft version

2014-08-20
14:14
 Measurement of the production and lepton charge asymmetry of $\textit{W}$ bosons in Pb+Pb collisions at $\sqrt{s_{\mathrm{\mathbf{NN}}}}=$2.76 TeV with the ATLAS detector / ATLAS Collaboration A measurement of $\textit{W}$ boson production in lead-lead collisions at $\sqrt{s_{\mathrm{NN}}}=$2.76 TeV is presented [...] CERN-PH-EP-2014-156 ; arXiv:1408.4674. - 2014. - 18 p. Previous draft version - Full text - Full text

2014-08-20
07:34
 Determination of gamma and -2beta_s from charmless two-body decays of beauty mesons / LHCb collaboration Using the latest LHCb measurements of time-dependent CP violation in the B^0_s -> K^+K^- decay, a U-spin relation between the decay amplitudes of B^0_s -> K^+K^- and B^0 -> \pi^+\pi^- decay processes allows constraints to be placed on the angle gamma of the unitarity triangle and on the B^0_s mixing phase -2\beta_s. [...] arXiv:1408.4368 ; CERN-PH-EP-2014-207 ; LHCB-PAPER-2014-045. - 2014. Preprint - Full text

2014-08-20
07:34
 Measurement of the forward $W$ boson cross-section in $pp$ collisions at $\sqrt{s} = 7 {\rm \, TeV}$ / LHCb collaboration A measurement of the inclusive $W \to \mu\nu$ production cross-section using data from $pp$ collisions at a centre-of-mass energy of $\sqrt{s} = 7 {\rm \, TeV}$ is presented. [...] arXiv:1408.4354 ; LHCB-PAPER-2014-033 ; CERN-PH-EP-2014-175. - 2014. - 29 p. Preprint - Full text - Related supplementary data file - Related data file - Full text