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PH-EP Articles

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2015-07-14
08:36
Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda_b^0\to J/\psi K^-p}$ decays / LHCb collaboration
Observations of exotic structures in the $J/\psi p$ channel, that we refer to as pentaquark-charmonium states, in $\Lambda_b^0\to J/\psi K^- p$ decays are presented. The data sample corresponds to an integrated luminosity of 3/fb acquired with the LHCb detector from 7 and 8 TeV pp collisions. [...]
arXiv:1507.03414; CERN-PH-EP-2015-153; LHCB-PAPER-2015-029.- Geneva : CERN, 2015 - 48 p. - Published in : Phys. Rev. Lett. 115 (2015) 072001 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file: PDF; External link: Preprint

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2015-06-19
14:29
Search for heavy Majorana neutrinos with the ATLAS detector in pp collisions at $\sqrt{s} = 8$ TeV / ATLAS Collaboration
A search for heavy Majorana neutrinos in events containing a pair of high-$p_{\mathrm{T}}$ leptons of the same charge and high-$p_{\mathrm{T}}$ jets is presented. The search uses $20.3 \mathrm{fb}^{-1}$ of $pp$ collision data collected with the ATLAS detector at the CERN Large Hadron Collider with a centre-of-mass energy of $\sqrt{s} = 8$ TeV. [...]
arXiv:1506.06020; CERN-PH-EP-2015-070.- Geneva : CERN, 2015 - 28 p. - Published in : J. High Energy Phys. 07 (2015) 162 Fulltext: PDF; Springer Open Access article: PDF; External links: Previous draft version; Preprint

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2015-05-09
07:30
Amplitude analysis of $B^0 \rightarrow \bar{D}^0 K^+ \pi^-$ decays / LHCb collaboration
The Dalitz plot distribution of $B^0 \rightarrow \bar{D}^0 K^+ \pi^-$ decays is studied using a data sample corresponding to $3.0\rm{fb}^{-1}$ of $pp$ collision data recorded by the LHCb experiment during 2011 and 2012. The data are described by an amplitude model that contains contributions from intermediate $K^*(892)^0$, $K^*(1410)^0$, $K^*_2(1430)^0$ and $D^*_2(2460)^-$ resonances. [...]
arXiv:1505.01505; LHCB-PAPER-2015-017; CERN-PH-EP-2015-107.- Geneva : CERN, 2015 - 30 p. - Published in : Phys. Rev. D 92 (2015) 012012 Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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2015-05-08
15:27
Search for the decay $B^0_s\to\overline{D}^0f_0(980)$ / LHCb Collaboration
A search for $B_s^0 \to \overline{D}^{0} f_{0}(980)$ decays is performed using $3.0\, {\rm fb}^{-1}$ of $pp$ collision data recorded by the LHCb experiment during 2011 and 2012. The $f_{0}(980)$ meson is reconstructed through its decay to the $\pi^{+}\pi^{-}$ final state in the mass window $900\, {\rm MeV}/c^{2} < m(\pi^{+}\pi^{-}) < 1080\, {\rm MeV}/c^{2}$. [...]
arXiv:1505.01654; LHCB-PAPER-2015-012; CERN-PH-EP-2015-086.- Geneva : CERN, 2015 - 20 p. - Published in : J. High Energy Phys. 08 (2015) 005 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Fulltext

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2015-05-08
10:46
Dalitz plot analysis of $B^0 \to \overline{D}^0 \pi^+\pi^-$ decays / LHCb Collaboration
The resonant substructures of $B^0 \to \overline{D}^0 \pi^+\pi^-$ decays are studied with the Dalitz plot technique. [...]
arXiv:1505.01710 ; LHCB-PAPER-2014-070 ; CERN-PH-EP-2015-110.
- 2015. - 64 p.
Related data file(s) - Preprint - Full text

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2015-04-30
07:43
Identification of beauty and charm quark jets at LHCb / LHCb collaboration
Identification of jets originating from beauty and charm quarks is important for measuring Standard Model processes and for searching for new physics. The performance of algorithms developed to select $b$- and $c$-quark jets is measured using data recorded by LHCb from proton-proton collisions at $\sqrt{s}=7$ TeV in 2011 and at $\sqrt{s}=8$ TeV in 2012. [...]
arXiv:1504.07670; LHCB-PAPER-2015-016; CERN-PH-EP-2015-101.- Geneva : CERN, 2015 - 31 p. - Published in : J. Instrum. 10 (2015) P06013 Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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2015-04-22
07:50
A study of $CP$ violation in $B^\mp \rightarrow Dh^\mp$ ($h=K,\pi$) with the modes $D \rightarrow K^\mp \pi^\pm \pi^0$, $D \rightarrow \pi^+\pi^-\pi^0$ and $D \rightarrow K^+K^-\pi^0$ / LHCb collaboration
An analysis of the decays of $B^\mp \rightarrow D K^\mp$ and $B^\mp \rightarrow D \pi^\mp $ is presented in which the $D$ meson is reconstructed in the three-body final states $K^\mp \pi^\pm \pi^0$, $\pi^+ \pi^- \pi^0$ and $K^+ K^- \pi^0$. Using data from LHCb corresponding to an integrated luminosity of 3.0~fb$^{-1}$ of $pp$ collisions, measurements of several $CP$ observables are performed. [...]
arXiv:1504.05442; CERN-PH-EP-2015-097; LHCB-PAPER-2015-014.- Geneva : CERN, 2015 - 25 p. - Published in : Phys. Rev. D 91 (2015) 112014 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

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2015-04-18
19:40
Search for a pseudoscalar boson decaying into a Z boson and the 125 GeV Higgs boson in $\mathrm{\ell^+ \ell^- b \bar{b}}$ final states / CMS Collaboration
Results are reported on a search for decays of a pseudoscalar A boson into a Z boson and a light scalar h boson, where the Z boson decays into a pair of oppositely-charged electrons or muons, and the h boson decays into $\mathrm{b \bar{b}}$. The search is based on data from proton-proton collisions at a center-of-mass energy $\sqrt{s}$ = 8 TeV collected with the CMS detector, corresponding to an integrated luminosity of 19.7 fb$^{-1}$. [...]
arXiv:1504.04710; CMS-HIG-14-011; CERN-PH-EP-2015-088.- Geneva : CERN, 2015 - 34 p. - Published in : Phys. Lett. B 748 (2015) 221 Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint

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2015-04-16
17:25
Search for invisible decays of the Higgs boson produced in association with a hadronically decaying vector boson in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector / ATLAS Collaboration
A search for Higgs boson decays to invisible particles is performed using 20.3 fb$^{-1}$ of $pp$ collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the Large Hadron Collider. The process considered is Higgs boson production in association with a vector boson ($V$ = $W$ or $Z$) that decays hadronically, resulting in events with two or more jets and large missing transverse momentum. [...]
arXiv:1504.04324; CERN-PH-EP-2015-061.- Geneva : CERN, 2015 - 14 p. - Published in : Eur. Phys. J. C (2015) 75:337 Fulltext: PDF; Springer Open Access article: PDF; External links: Previous draft version; Preprint

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2015-04-16
15:47
Measurement of the top pair production cross-section in 8 TeV proton--proton collisions using kinematic information in the lepton+jets final state with ATLAS / ATLAS Collaboration
A measurement is presented of the $t\bar{t}$ inclusive production cross-section in $pp$ collisions at a center-of-mass energy of $\sqrt{s}=8$ TeV using data collected by the ATLAS detector at the CERN Large Hadron Collider. The measurement was performed in the lepton+jets final state using a data set corresponding to an integrated luminosity of 20.3 fb$^{-1}$. [...]
arXiv:1504.04251; CERN-PH-EP-2015-024.- Geneva : CERN, 2015 - 17 p. - Published in : Phys. Rev. D 91 (2015) 112013 APS Open Access article: PDF; Fulltext: PDF; External links: Previous draft version; Preprint

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