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CERN Document Server 2,049 record trovati  1 - 10successivofine  salta al record: La ricerca ha impiegato 3.53 secondi. 
1.
(100)
Model-independent search for $CP$ violation in $D^{0} \to K^{-}K^{+}\pi^{-}\pi^{+}$ and $D^{0} \to \pi^{-}\pi^{+}\pi^{+}\pi^{-}$ decays / LHCb collaboration
A search for $CP$ violation in the phase-space structures of $D^{0}$ and $\bar{D^{0}}$ decays to the final states $K^{-}K^{+}\pi^{-}\pi^{+}$ and $\pi^{-}\pi^{+}\pi^{+}\pi^{-}$ is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0 fb$^{−1}$ collected in 2011 by the LHCb experiment in $pp$ collisions at a centre-of-mass energy of 7 TeV. [...]
arXiv:1308.3189; CERN-PH-EP-2013-151; LHCB-PAPER-2013-041; CERN-PH-EP-2013-151; LHCB-PAPER-2013-041.- Geneva : CERN, 2013-11-04 - 11 p. - Published in : Phys. Lett. B 726 (2013) 623-633 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
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2.
(91)
Measurement of the CP violating phase $\phi_s$ in $\overline{B}^0_s \to J/\psi f_0(980)$ / LHCb Collaboration
Measurement of mixing-induced $CP$ violation in $\overline{B}^0_s$ decays is of prime importance in probing new physics. So far only the channel $\overline{B}^0_s\to J/\psi\phi$ has been used. [...]
arXiv:1112.3056; CERN-PH-EP-2011-205; LHCB-PAPER-2011-031; CERN-PH-EP-2011-205; LHCB-PAPER-2011-031.- Geneva : CERN, 2013-07-16 - 9 p. - Published in : Phys. Lett. B 707 (2012) 497-505 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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First measurement of time-dependent $C\!P$ violation in $B^0_s \to K^+K^-$ decays / LHCb collaboration
Direct and mixing-induced $C\!P$-violating asymmetries in $B^0_s \to K^+K^-$ decays are measured for the first time using a data sample of $pp$ collisions, corresponding to an integrated luminosity of $1.0~\mathrm{fb}^{-1}$, collected with the LHCb detector at a centre-of-mass energy of $7~\mathrm{TeV}$. The results are $C_{KK} = 0.14 \pm 0.11 \pm 0.03$ and $S_{KK} = 0.30 \pm 0.12 \pm 0.04$, where the first uncertainties are statistical and the second systematic. [...]
arXiv:1308.1428; CERN-PH-EP-2013-144; LHCB-PAPER-2013-040; CERN-PH-EP-2013-144; LHCB-PAPER-2013-040.- Geneva : CERN, 2013-10 - 26 p. - Published in : JHEP 10 (2013) 183 APS published version, local copy: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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(89)
Measurement of the flavour-specific $CP$-violating asymmetry $a_{\rm sl}^s$ in $B_s^0$ decays / LHCb collaboration
The CP-violating asymmetry $a_{sl}^s$ is studied using semileptonic decays of $B_s^0$ and anti-$B_s^0$ mesons produced in pp collisions at a centre-of-mass energy of 7 TeV at the LHC, exploiting a data sample corresponding to an integrated luminosity of 1.0fb$^-1$. The reconstructed final states are $D_s^{\pm}\mu^{\mp}$, with the $D_s^{\pm}$ particle decaying in the $\phi\pi^{\pm}$ mode. [...]
arXiv:1308.1048; LHCB-PAPER-2013-033; CERN-PH-EP-2013-141; LHCB-PAPER-2013-033; CERN-PH-EP-2013-141.- Geneva : CERN, 2014-01-20 - 9 p. - Published in : Phys. Lett. B 728 (2014) 607-615 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): LHCb-PAPER-2013-033-figures - ZIP; asls-paper-1fb-rev10 - PDF; asl_ANA_rev8 - PDF; Related supplementary data file(s): ZIP;
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5.
(89)
Search for $CP$ violation in $D^{\pm}\rightarrow K^0_S K^{\pm}$ and $D^{\pm}_{s}\rightarrow K^0_S \pi^{\pm}$ decays / LHCb collaboration
A search for $CP$ violation in Cabibbo-suppressed $D^{\pm}\rightarrow K^0_S K^{\pm}$ and $D^{\pm}_{s}\rightarrow K^0_S \pi^{\pm}$ decays is performed using $pp$ collision data, corresponding to an integrated luminosity of 3~fb$^{-1}$, recorded by the LHCb experiment. The individual $CP$-violating asymmetries are measured to be \begin{eqnarray*} \mathcal{A}_{CP}^{D^{\pm}\rightarrow K^0_S K^{\pm}} & = & (+0.03 \pm 0.17 \pm 0.14) \% \\ \mathcal{A}_{CP}^{D^{\pm}_s\rightarrow K^0_S \pi^{\pm}} & = & (+0.38 \pm 0.46 \pm 0.17) \%, \end{eqnarray*} assuming that $CP$ violation in the Cabibbo-favoured decays is negligible. [...]
arXiv:1406.2624; CERN-PH-EP-2014-125; LHCB-PAPER-2014-018; LHCB-PAPER-2014-018; CERN-PH-EP-2014-125.- Geneva : CERN, 2014-10-03 - 19 p. - Published in : JHEP 10 (2014) 025 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF;
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(86)
Measurements of the branching fractions and $C\!P$ asymmetries of $B^{\pm} \to J\!/\!\psi\, \pi^{\pm}$ and $B^{\pm} \to \psi(2S) \pi^{\pm}$ decays / LHCb Collaboration
A study of $B^{\pm} \to J\!/\!\psi\, \pi^{\pm}$ and $B^{\pm} \to \psi(2S) \pi^{\pm}$ decays is performed with data corresponding to $0.37\,{\rm fb}^{-1}$ of proton-proton collisions at $\sqrt{s}=7\,\mathrm{Te\kern -0.1em V}$. Their branching fractions are found to be \begin{eqnarray*} \mathcal{B}(B^{\pm} \to J\!/\!\psi\, \pi^{\pm}) &=& (3.88 \pm 0.11 \pm 0.15) \times 10^{-5}\ {\rm and}\\ \mathcal{B}(B^{\pm} \to \psi(2S) \pi^{\pm}) &=& (2.52 \pm 0.26 \pm 0.15) \times 10^{-5}, \end{eqnarray*} where the first uncertainty is related to the statistical size of the sample and the second quantifies systematic effects. [...]
arXiv:1203.3592; LHCB-PAPER-2011-024; CERN-PH-EP-2012-070; LHCB-PAPER-2011-024; CERN-PH-EP-2012-070.- Geneva : CERN, 2012 - 10 p. - Published in : Phys. Rev. D 85 (2012) 091105(R) APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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7.
(84)
Search for CP violation in $D^{+} \to K^{-}K^{+}\pi^{+}$ decays / LHCb Collaboration
A model-independent search for direct CP violation in the Cabibbo suppressed decay $D^+ \to K^- K^+\pi^+$ in a sample of approximately 370,000 decays is carried out. The data were collected by the LHCb experiment in 2010 and correspond to an integrated luminosity of 35 pb$^{-1}$. [...]
arXiv:1110.3970; LHCB-PAPER-2011-017; CERN-PH-EP-2011-163; LHCB-PAPER-2011-017; CERN-PH-EP-2011-163.- Geneva : CERN, 2011 - 13 p. - Published in : Phys. Rev. D 84 (2011) 112008 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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(84)
First observation of $B^{0}_{s} \to J/\psi f_{0}$(980) decays / LHCb Collaboration
Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay $B^{0}_{s} \to J/\psi f_{0}$(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the $B^0_s$ system. [...]
arXiv:1102.0206; CERN-PH-EP-2011-011; LHCb-PAPER-2011-002; LHCB-PAPER-2011-002; CERN-PH-EP-2011-011; LHCb-PAPER-2011-002.- 2013-07-16 - 8 p. - Published in : Phys. Lett. B 698 (2011) 115-122 Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint
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9.
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Measurements of the Branching fractions for $B_{(s)} \to D_{(s)}\pi\pi\pi$ and $\Lambda_b^0 \to \Lambda_c^+\pi\pi\pi$ / LHCb Collaboration
Branching fractions of the decays $H_b\to H_c\pi^-\pi^+\pi^-$ relative to $H_b\to H_c\pi^-$ are presented, where $H_b$ ($H_c$) represents $\overline{B^0}$ ($D^+$), $B^-$ ($D^0$), $\overline{B_s^0}$ ($D_s^+$) and $\Lambda_b^0$ ($\Lambda_c^+$). The measurements are performed with the LHCb detector using 35~${\rm pb^{-1}}$ of data collected at $\sqrt{s}=7$~TeV. [...]
arXiv:1109.6831; LHCB-PAPER-2011-016; CERN-PH-EP-2011-151; LHCB-PAPER-2011-016; CERN-PH-EP-2011-151.- Geneva : CERN, 2011 - 26 p.
APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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Observation of $B^0_s$-$\bar{B}^0_s$ mixing and measurement of mixing frequencies using semileptonic B decays / LHCb collaboration
The $B^0_s$ and $B^0$ mixing frequencies, $\Delta m_s$ and $\Delta m_d$, are measured using a data sample corresponding to an integrated luminosity of 1.0 fb$^{-1}$ collected by the LHCb experiment in $pp$ collisions at a centre of mass energy of 7 TeV during 2011. Around 1.8x10$^{6}$ candidate events are selected of the type $B^0_{(s)} \to D^-_{(s)} \mu^+$(+anything), where about half are from peaking and combinatorial backgrounds. [...]
arXiv:1308.1302; CERN-PH-EP-2013-143; LHCB-PAPER-2013-036; LHCB-PAPER-2013-036; CERN-PH-EP-2013-143.- Geneva : CERN, 2013-12-04 - 22 p. - Published in : Eur. Phys. J. C 73 (2013) 2655 Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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