# PH-EP Articles

2016-05-04
08:04
 Measurement of forward $W$ and $Z$ boson production in association with jets in proton-proton collisions at $\sqrt{s}=8$ TeV / LHCb collaboration The production of $W$ and $Z$ bosons in association with jets is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8~TeV by the LHCb experiment, corresponding to an integrated luminosity of 1.98 $\pm$ 0.02 fb$^{-1}$. The $W$ boson is identified using its decay to a muon and a neutrino, while the $Z$ boson is identified through its decay to a muon pair. [...] arXiv:1605.00951; CERN-EP-2016-092; LHCB-PAPER-2016-011.- Geneva : CERN, 2016 - 27 p. - Published in : J. High Energy Phys. 05 (2016) 131 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2016-04-18
17:40
 Measurements of $Z\gamma$ and $Z\gamma\gamma$ production in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector / ATLAS Collaboration The production of $Z$ bosons with one or two isolated high-energy photons is studied using $pp$ collisions at $\sqrt{s}$ = 8 TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb$^{-1}$ collected by the ATLAS detector during the 2012 LHC data taking. [...] arXiv:1604.05232; CERN-EP-2016-049.- Geneva : CERN, 2016 - 41 p. - Published in : Phys. Rev. D 93 (2016) 112002 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint

2016-04-17
09:24
 Search for lepton flavour violating decays of heavy resonances and quantum black holes to an $\mathrm{ e }\mu$ pair in proton-proton collisions at $\sqrt{s} =$ 8 TeV / CMS Collaboration A search for narrow resonances decaying to an electron and a muon is presented. The $\mathrm{ e }\mu$ mass spectrum is also investigated for non-resonant contributions from the production of quantum black holes (QBHs). [...] arXiv:1604.05239; CERN-EP-2016-068; CMS-EXO-13-002.- Geneva : CERN, 2016 - 38 p. - Published in : Eur. Phys. J. C 76 (2016) 317 Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint

2016-04-15
01:51
 Search for metastable heavy charged particles with large ionization energy loss in pp collisions at $\sqrt{s} = 13$ TeV using the ATLAS experiment / ATLAS Collaboration This paper presents a search for massive charged long-lived particles produced in pp collisions at $\sqrt{s}=$ 13 TeV at the LHC using the ATLAS experiment. The dataset used corresponds to an integrated luminosity of 3.2 fb$^{-1}$. [...] arXiv:1604.04520; CERN-EP-2016-063.- Geneva : CERN, 2016 - 36 p. - Published in : Phys. Rev. D 93 (2016) 112015 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint

2016-04-14
09:52
 Measurement of the properties of the $\Xi_b^{*0}$ baryon / LHCb Collaboration We perform a search for near-threshold $\Xi_b^0$ resonances decaying to $\Xi_b^- \pi^+$ in a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by the LHCb experiment. We observe one resonant state, with the following properties: \begin{eqnarray*} m(\Xi_b^{*0}) - m(\Xi_b^-) - m(\pi^+) &=& 15.727 \pm 0.068 \, (\mathrm{stat}) \pm 0.023 \, (\mathrm{syst}) \, \mathrm{MeV}/c^2, \\ \Gamma(\Xi_b^{*0}) &=& 0.90 \pm 0.16 \, (\mathrm{stat}) \pm 0.08 \, (\mathrm{syst}) \, \mathrm{MeV} [...] arXiv:1604.03896; LHCB-PAPER-2016-010; CERN-EP-2016-082.- Geneva : CERN, 2016 - 18 p. - Published in : J. High Energy Phys. 05 (2016) 161 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2016-04-13
15:15
 Search for the Standard Model Higgs boson decaying into $b\bar{b}$ produced in association with top quarks decaying hadronically in $pp$ collisions at $\sqrt{s}$=8 TeV with the ATLAS detector / ATLAS Collaboration A search for Higgs boson production in association with a pair of top quarks ($t\bar{t}H$) is performed, where the Higgs boson decays to $b\bar{b}$, and both top quarks decay hadronically. The data used correspond to an integrated luminosity of 20.3 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=8$ TeV collected with the ATLAS detector at the Large Hadron Collider. [...] arXiv:1604.03812; CERN-EP-2016-058.- Geneva : CERN, 2016 - 48 p. - Published in : J. High Energy Phys. 05 (2016) 160 Fulltext: PDF; Springer Open Access article: PDF; External links: Previous draft version; Preprint

2016-04-07
08:52
 Measurement of the mass and lifetime of the $\Omega_b^-$ baryon / LHCb collaboration A proton-proton collision data sample, corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by LHCb at $\sqrt{s}=7$ and 8 TeV, is used to reconstruct $63\pm9$ $\Omega_b^-\to\Omega_c^0\pi^-$, $\Omega_c^0\to pK^-K^-\pi^+$ decays. Using the $\Xi_b^-\to\Xi_c^0\pi^-$, $\Xi_c^0\to pK^-K^-\pi^+$ decay mode for calibration, the lifetime ratio and absolute lifetime of the $\Omega_b^-$ baryon are measured to be \begin{align*} \frac{\tau_{\Omega_b^-}}{\tau_{\Xi_b^-}} &= 1.11\pm0.16\pm0.03, \\ \tau_{\Omega_b^-} &= 1.78\pm0.26\pm0.04\pm0.05~{\rm ps}, \end{align*} where the uncertainties are statistical, systematic and from the calibration mode (for $\tau_{\Omega_b^-}$ only). [...] arXiv:1604.01412; CERN-EP-2016-081; LHCB-PAPER-2016-008.- Geneva : CERN, 2016 - 21 p. - Published in : Phys. Rev. D 93 (2016) 092007 APS Open Access article: PD; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

2016-04-06
15:07
 Model-independent measurement of the CKM angle $\gamma$ using $B^0 \to D K^{\ast 0}$ decays with $D \to K_{S}^{0} \pi^{+} \pi^{-}$ and $K_{S}^{0} K^{+} K^{-}$ / LHCb Collaboration A binned Dalitz plot analysis of the decays $B^0 \to D K^{\ast 0}$, with $D \to K_{S}^{0} \pi^{+} \pi^{-}$ and $D \to K_{S}^{0} K^{+} K^{-}$, is performed to measure the observables $x_\pm$ and $y_\pm$, which are related to the CKM angle $\gamma$ and the hadronic parameters of the decays. The $D$ decay strong phase variation over the Dalitz plot is taken from measurements performed at the CLEO-c experiment, making the analysis independent of the $D$ decay model. [...] arXiv:1604.01525; LHCB-PAPER-2016-006; CERN-EP-2016-083.- Geneva : CERN, 2016 - 34 p. - Published in : J. High Energy Phys. 06 (2016) 131 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

2016-04-04
16:24
 Search for new phenomena in events with a photon and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13 TeV$ with the ATLAS detector / ATLAS Collaboration Results of a search for new phenomena in events with an energetic photon and large missing transverse momentum with the ATLAS experiment at the Large Hadron Collider are reported. The data were collected in proton--proton collisions at a centre-of-mass energy of 13 TeV and correspond to an integrated luminosity of 3.2 $fb^{-1}$. [...] arXiv:1604.01306; CERN-EP-2016-060.- Geneva : CERN, 2016 - 23 p. - Published in : J. High Energy Phys. 06 (2016) 059 Fulltext: PDF; Springer Open Access article: PDF; External links: Previous draft version; Preprint

2016-03-30
08:08
 Search for resonances in the mass distribution of jet pairs with one or two jets identified as $b$-jets in proton--proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector / ATLAS Collaboration Searches for high-mass resonances in the dijet invariant mass spectrum with one or two jets identified as $b$-jets are performed using an integrated luminosity of $3.2$ fb$^{-1}$ of proton--proton collisions with a centre-of-mass energy of $\sqrt{s}=13$ TeV recorded by the ATLAS detector at the Large Hadron Collider. No evidence of anomalous phenomena is observed in the data, which are used to exclude, at 95% credibility level, excited $b^{*}$ quarks with masses from 1.1 TeV to 2.1 TeV and leptophobic $Z'$ bosons with masses from 1.1 TeV to 1.5 TeV. [...] arXiv:1603.08791; CERN-EP-2016-066.- Geneva : CERN, 2016 - 32 p. - Published in : Phys. Lett. B 759 (2016) 229-246 Elsevier Open Access article: PDF; Fulltext: PDF; External links: Preprint; Previous draft version