# PH-EP Preprints

Posledne pridané:
2014-04-08
22:59
 Measurement of the ratio $B(t \to Wb)/B(t \to Wq)$ in pp collisions at $\sqrt{s}$ = 8 TeV / CMS Collaboration The ratio of the top-quark branching fractions $R = B(t \to Wb)/B(t \to Wq)$, where the denominator includes the sum over all down-type quarks (q = b, s, d), is measured in the $t\bar{t}$ dilepton final state with proton-proton collision data at $\sqrt{s}$ = 8 TeV from an integrated luminosity of 19.7 inverse-femtobarns, collected with the CMS detector. [...] arXiv:1404.2292 ; CMS-TOP-12-035 ; CERN-PH-EP-2014-052. - 2014. - 37 p. Preprint

2014-04-05
18:49
 Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes / CMS Collaboration A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. [...] arXiv:1404.1344 ; CMS-HIG-13-030 ; CERN-PH-EP-2014-051. - 2014. - 51 p. Preprint

2014-04-01
04:36
 Angular analysis of charged and neutral $B \to K \mu^+\mu^-$ decays / LHCb collaboration The angular distributions of the rare decays $B^+ \to K^+\mu^+\mu^-$ and $B^0 \to K^0_{\rm\scriptscriptstyle S}\mu^+\mu^-$ are studied with data corresponding to 3$~$fb$^{-1}$ of integrated luminosity, collected in proton-proton collisions at 7 and 8$~$TeV centre-of-mass energies with the LHCb detector. [...] arXiv:1403.8045 ; LHCB-PAPER-2014-007 ; CERN-PH-EP-2014-056. - 2014. - 27 p. Preprint - Related data file(s) - Related supplementary data file(s)

2014-04-01
04:36
 Differential branching fractions and isospin asymmetries of $B \to K^{(*)}\mu^+\mu^+$ decays / LHCb collaboration The isospin asymmetries of $B \to K\mu^+\mu^-$ and $B \to K^{*}\mu^+\mu^-$ decays and the partial branching fractions of the $B^0 \to K^0\mu^+\mu^-$, $B^+ \to K^+\mu^+\mu^-$ and $B^+ \to K^{*+}\mu^+\mu^-$ decays are measured as functions of the dimuon mass squared, $q^2$. [...] arXiv:1403.8044 ; LHCB-PAPER-2014-006 ; CERN-PH-EP-2014-055. - 2014. - 23 p. Preprint - Related data file(s) - Related supplementary data file(s)

2014-04-01
00:12
 Search for dark matter in events with a $Z$ boson and missing transverse momentum in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector / ATLAS Collaboration A search is presented for production of dark matter particles recoiling against a leptonically decaying $Z$ boson in 20.3 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector at the Large Hadron Collider. [...] arXiv:1404.0051 ; CERN-PH-EP-2013-231. - 2014. - 8 p. Previous draft version - Preprint

2014-03-28
16:24
 Measurement of the t-channel single-top-quark production cross section and of the |$V_{tb}$| CKM matrix element in pp collisions at $\sqrt{s}$ = 8 TeV / CMS Collaboration Measurements are presented of the t-channel single-top-quark production cross section in proton-proton collisions at $\sqrt{s}$ = 8 TeV. [...] arXiv:1403.7366 ; CMS-TOP-12-038-003 ; CERN-PH-EP-2014-032. - 2014. - 41 p. Additional information for the analysis - CMS AuthorList - Full text

2014-03-25
10:14
 Search for top quark decays $t \rightarrow qH$ with $H \to \gamma\gamma$ using the ATLAS detector / ATLAS Collaboration A search is performed for flavour-changing neutral currents in the decay of a top quark to an up-type ($c, u$) quark and a Higgs boson, where the Higgs boson decays to two photons. [...] arXiv:1403.6293 ; CERN-PH-EP-2014-036. - 2014. - 45 p. Previous draft version - Preprint

2014-03-25
03:44
 Transverse momentum distribution and nuclear modification factor of forward neutral pion in proton–lead collisions at $\sqrt{s_{NN}}$= 5.02 TeV / LHCf Collaboration The transverse momentum ($p_\text{T}$) distribution for inclusive neutral pions in the very forward rapidity region has been measured, with the Large Hadron Collider forward detector (LHCf), in proton--lead collisions at nucleon-nucleon center-of-mass energies of $\sqrt{s_{NN}} = 5.02$TeV at the LHC. The $p_\text{T}$ spectra obtained in the rapidity range $-11.0 < y_\text{lab} < -8.9$ and $0 < p_\text{T} < 0.6$GeV (in the detector reference frame) show a strong suppression of the production of neutral pions after taking into account ultra-peripheral collisions. [...] arXiv:1403.7845; CERN-PH-EP-2014-059.- Geneva : CERN, 2014 - 13 p. Draft (restricted): PDF; Fulltext: PDF; External link: Preprint

2014-03-21
21:57
 Measurement of the 4$\ell$ Cross Section at the $Z$ Resonance and Determination of the Branching Fraction of $Z\rightarrow 4\ell$ in $pp$ Collisions at $\sqrt{s}$ = 7 and 8 TeV with ATLAS / ATLAS Collaboration Measurements of four-lepton (4$\ell$, $\ell=e,\mu$) production cross sections at the $Z$ resonance in $pp$ collisions at the LHC with the ATLAS detector are presented. [...] arXiv:1403.5657 ; CERN-PH-EP-2014-047. - 2014. - 20 p. Previous draft version - Preprint

2014-03-20
21:21
 Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in $pp$ collisions at $\sqrt{s}$=8 TeV with the ATLAS detector / ATLAS Collaboration Searches for the electroweak production of charginos, neutralinos and sleptons in final states characterized by the presence of two leptons (electrons and muons) and missing transverse momentum are performed using 20.3 fb$^{-1}$ of proton-proton collision data at $\sqrt{s}$=8 TeV recorded with the ATLAS experiment at the Large Hadron Collider. [...] arXiv:1403.5294 ; CERN-PH-EP-2014-037. - 2014. - 53 p. Previous draft version - Preprint