# EP Articles

Ultimi arrivi:
2016-08-27
08:50
 Jet-like correlations with neutral pion triggers in pp and central Pb-Pb collisions at 2.76 TeV / ALICE Collaboration We present measurements of two-particle correlations with neutral pion trigger particles of transverse momenta $8 < p_{\mathrm{T}}^{\rm trig} < 16~\mathrm{GeV}/c$ and associated charged particles of $0.5 < p_{\mathrm{T}}^{\rm assoc} < 10~\mathrm{GeV}/c$ versus the azimuthal angle difference $\Delta\varphi$ at midrapidity in pp and central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV with ALICE. The new measurements exploit associated charged hadrons down to $0.5~\mathrm{GeV}/c$, which significantly extends our previous measurement that only used charged hadrons above $3~\mathrm{GeV}/c$. [...] arXiv:1608.07201; CERN-EP-2016-195.- Geneva : CERN, 2016 - 26 p. - Published in : Phys. Lett. B 763 (2016) 238-250 Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint

2016-08-05
08:00
 Measurement of forward $W\to e\nu$ production in $pp$ collisions at $\sqrt{s}=8$ TeV / LHCb collaboration A measurement of the cross-section for $W \to e\nu$ production in $pp$ collisions is presented using data corresponding to an integrated luminosity of $2\,$fb$^{-1}$ collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s}=8\,$TeV. The electrons are required to have more than $20\,$GeV of transverse momentum and to lie between 2.00 and 4.25 in pseudorapidity. [...] arXiv:1608.01484; LHCB-PAPER-2016-024; CERN-EP-2016-179.- Geneva : CERN, 2016 - 29 p. - Published in : J. High Energy Phys. 10 (2016) 030 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2016-08-04
16:04
 Amplitude analysis of $B^- \to D^+ \pi^- \pi^-$ decays / LHCb Collaboration The Dalitz plot analysis technique is used to study the resonant substructures of $B^- \to D^+ \pi^- \pi^-$ decays in a data sample corresponding to 3.0 fb$^-1$ of $pp$ collision data recorded by the LHCb experiment during 2011 and 2012. A model-independent analysis of the angular moments demonstrates the presence of resonances with spins 1, 2 and 3 at high $D^+\pi^-$ mass. [...] arXiv:1608.01289; LHCB-PAPER-2016-026; CERN-EP-2016-184.- Geneva : CERN, 2016 - 39 p. - Published in : Phys. Rev. D 94 (2016) 072001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

2016-08-02
07:53
 Search for structure in the $B_s^0\pi^\pm$ invariant mass spectrum / LHCb collaboration The $B_s^0\pi^\pm$ invariant mass distribution is investigated in order to search for possible exotic meson states. The analysis is based on a data sample recorded with the LHCb detector corresponding to $3$ fb$^{-1}$ of $pp$ collision data at $\sqrt{s} = 7$ and $8$ TeV. [...] arXiv:1608.00435; LHCB-PAPER-2016-029; CERN-EP-2016-189.- Geneva : CERN, 2016 - 16 p. - Published in : Phys. Rev. Lett. 117 (2016) 152003 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplemenrary data file(s): ZIP; External link: Preprint

2016-07-27
08:13
 Measurement of the ratio of branching fractions $\mathcal{B}(B_{c}^{+} \to J/\psi K^{+})/\mathcal{B}(B_{c}^{+} \to J/\psi\pi^{+})$ / LHCb collaboration The ratio of branching fractions $R_{K/\pi} \equiv \mathcal{B}(B_{c}^{+} \to J/\psi K^{+})/\mathcal{B}(B_{c}^{+} \to J/\psi\pi^{+})$ is measured with $pp$ collision data collected by the LHCb experiment at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 3${\mbox{fb}^{-1}}$. It is found to be $R_{K/\pi} = 0.079\pm0.007\pm0.003$, where the first uncertainty is statistical and the second is systematic. [...] arXiv:1607.06823; LHCB-PAPER-2016-020; CERN-EP-2016-173.- Geneva : CERN, 2016 - 16 p. - Published in : J. High Energy Phys. 09 (2016) 153 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2016-07-21
11:31
 Measurement of the forward Z boson production cross-section in pp collisions at $\sqrt{s} = 13$ TeV / LHCb Collaboration A measurement of the production cross-section of Z bosons in pp collisions at $\sqrt{s} = 13$ TeV is presented using dimuon and dielectron final states in LHCb data. The cross-section is measured for leptons with pseudorapidities in the range $2.0 < \eta < 4.5$, transverse momenta $p_\text{T} > 20$ GeV and dilepton invariant mass in the range $60 < m(\ell\ell)<120$ GeV [...] arXiv:1607.06495; LHCB-PAPER-2016-021; CERN-EP-2016-170.- Geneva : CERN, 2016 - 32 p. - Published in : J. High Energy Phys. 09 (2016) 136 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2016-07-14
08:56
 Measurement of exclusive $\gamma\gamma\rightarrow W^+W^-$ production and search for exclusive Higgs boson production in $pp$ collisions at $\sqrt{s} = 8$ TeV using the ATLAS detector / ATLAS Collaboration Searches for exclusively produced $W$ boson pairs in the process $pp(\gamma\gamma) \rightarrow pW^+W^-p$ and exclusively produced Higgs boson in the process $pp(gg) \rightarrow pHp$ have been performed using $e^{\pm}\mu^{\mp}$ final states. These measurements use 20.2 fb$^{-1}$ of $pp$ collisions collected by the ATLAS experiment at a center-of-mass energy $\sqrt{s}=8$ TeV at the LHC. [...] arXiv:1607.03745; CERN-EP-2016-123.- Geneva : CERN, 2016 - 31 p. - Published in : Phys. Rev. D 94 (2016) 032011 APS Open Access article: PDF; Fulltext: PDF; External links: Preprint; Previous draft version

2016-07-14
08:56
 Search for high-mass new phenomena in the dilepton final state using proton--proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration A search is conducted for both resonant and non-resonant high-mass new phenomena in dielectron and dimuon final states. The search uses 3.2 fb$^{-1}$ of proton--proton collision data, collected at $\sqrt{s} = 13$ TeV by the ATLAS experiment at the LHC in 2015. [...] arXiv:1607.03669; CERN-EP-2016-116.- Geneva : CERN, 2016 - 35 p. - Published in : Phys. Lett. B 761 (2016) 372-392 Elsevier Open Access article: PDF; Fulltext: PDF; External links: Preprint; Previous draft version

2016-07-05
08:37
 Measurement of the differential cross sections for top quark pair production as a function of kinematic event variables in pp collisions at $\sqrt{s}$ = 7 and 8 TeV / CMS Collaboration Measurements are reported of the normalized differential cross sections for top quark pair production with respect to four kinematic event variables: the missing transverse energy; the scalar sum of the jet transverse momentum (pT); the scalar sum of the pT of all objects in the event; and the pT of leptonically decaying W bosons from top quark decays. The data sample, collected using the CMS detector at the LHC, consists of 5.0 inverse-femtobarns of proton-proton collisions at $\sqrt{s}$ = 7 TeV and 19.7 inverse-femtobarns at $\sqrt{s}$ = 8 TeV. [...] arXiv:1607.00837; CMS-TOP-12-042; CERN-EP-2016-139.- Geneva : CERN, 2016 - 40 p. - Published in : Phys. Rev. D 94 (2016) 052006 APS Open Access article: PDF; Fulltext: PDF; External link: Preprint

2016-06-28
08:04
 Search for the Higgs boson produced in association with a $W$ boson and decaying to four $b$-quarks via two spin-zero particles in $pp$ collisions at 13 TeV with the ATLAS detector / ATLAS Collaboration This paper presents a dedicated search for exotic decays of the Higgs boson to a pair of new spin-zero particles, $H \rightarrow aa$, where the particle $a$ decays to $b$-quarks and has a mass in the range of 20-60 GeV. The search is performed in events where the Higgs boson is produced in association with a $W$ boson, giving rise to a signature of a lepton (electron or muon), missing transverse momentum, and multiple jets from $b$-quark decays. [...] arXiv:1606.08391; CERN-EP-2016-135.- Geneva : CERN, 2016 - 41 p. - Published in : Eur. Phys. J. C 76 (2016) 605 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint