CERN Accelerating science

CERN Document Server 找到 19 笔记录  1 - 10下一个  跳到记录: 检索需时 0.89 秒. 
1.
Powers of Ten / Eames, Charles (Pyramid Films) ; Eames, Ray (Pyramid Films)
Powers of Ten is a 1977 short documentary film written and directed by Charles Eames and his wife, Ray. The film depicts the relative scale of the Universe in factors of ten. The film begins with an aerial image of a man reclining on a blanket; the view is that of one meter across [...]
IPPOG-RDB-2022-024.- Geneva : CERN, 2022 - Published in : Video in Italian
- Published in : Video in Greek
- Published in : Video in Dutch
- Published in : Video in English
- Published in : Video in French
- Published in : Video in German
- Published in : Video in Mandarin Chinese
- Published in : Video in Japanese Fulltext: PNG;
2.
Measurement of the $B^0_s-\overline{B}^0_s$ oscillation frequency $\Delta m_s$ in $B^0_s \to D^-_s (3)\pi$ decays / LHCb Collaboration
The $B^0_s$-$\overline{B}^0_s$ oscillation frequency $\Delta m_s$ is measured with 36 pb$^{-1}$ of data collected in $pp$ collisions at $\sqrt{s}$ = 7 TeV by the LHCb experiment at the Large Hadron Collider. A total of 1381 $B^0_s \rightarrow D_s^- \pi^+$ and $B^0_s \rightarrow D_s^- \pi^+\pi^-\pi^+$ signal decays are reconstructed, with average decay time resolutions of 44~fs and 36~fs, respectively. [...]
arXiv:1112.4311; LHCB-PAPER-2011-010; CERN-PH-EP-2011-194; LHCB-PAPER-2011-010; CERN-PH-EP-2011-194.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 709 (2012) 177-184 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
3.
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
4.
Absolute luminosity measurements with the LHCb detector at the LHC / LHCb Collaboration
Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections of reaction processes and are valuable to quantify the performance of the accelerator. [...]
arXiv:1110.2866; LHCB-PAPER-2011-015; CERN-PH-EP-2011-157; LHCB-PAPER-2011-015; CERN-PH-EP-2011-157.- Geneva : CERN, 2012 - 47 p. - Published in : JINST 7 (2012) P01010 Fulltext: PDF; IOP Open Access article: PDF; Related data file(s): ZIP; External link: Preprint
5.
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
6.
Observation of J/$\psi$ pair production in pp collisions at $\sqrt{s}$=7 TeV / LHCb Collaboration
The production of $J/\psi$ pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of $37.5 pb^{-1}$ collected with the LHCb detector. The production cross-section for pairs with both \jpsi in the rapidity range $2<y^{J/\psi}<4.5$ and transverse momentum $p_{T}^{J/\psi}<10 GeV/c$ is $$ \sigma^{J/\psi J/\psi} = 5.1\pm1.0\pm1.1 nb,$$ where the first uncertainty is statistical and the second systematic..
arXiv:1109.0963; LHCB-PAPER-2011-013; CERN-PH-EP-2011-135; LHCB-PAPER-2011-013; CERN-PH-EP-2011-135.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 707 (2012) 52-59 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: DURHAM
7.
Measurement of the inclusive $\phi$ cross-section in pp collisions at $\sqrt{s}$ = 7 TeV / LHCb Collaboration
The cross-section for inclusive phi meson production in pp collisions at a centre-of-mass energy of sqrt(s) = 7 TeV has been measured with the LHCb detector at the Large Hadron Collider. The differential cross-section is measured as a function of the phi transverse momentum p_T and rapidity y in the region 0.6 < p_T < 5.0 GeV/c and 2.44 < y < 4.06. [...]
arXiv:1107.3935; LHCB-PAPER-2011-007; CERN-PH-EP-2011-106; LHCB-PAPER-2011-007; CERN-PH-EP-2011-106.- Geneva : CERN, 2013-07-16 - 7 p. - Published in : Phys. Lett. B 703 (2011) 267-273 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Rivet analyses reference
8.
Measurement of $V^0$ production ratios in $pp$ collisions at $\sqrt{s}$ = 0.9 and 7 TeV / LHCb Collaboration
The $\bar{\Lambda} / \Lambda$ and $\bar{\Lambda} / K^0_\mathrm{S}$ production ratios are measured by the LHCb detector from $0.3\,\mathrm{nb}^{-1}$ of $pp$ collisions delivered by the LHC at $\sqrt{s} = 0.9$\,TeV and $1.8\,\mathrm{nb}^{-1}$ at $\sqrt{s} = 7$\,TeV. Both ratios are presented as a function of transverse momentum, $p_\mathrm{T}$, and rapidity, $y$, in the ranges {$0.15 < p_\mathrm{T} < 2.50\,\mathrm{GeV}/c$} and {$2.0<y<4.5$}. [...]
arXiv:1107.0882; CERN-PH-EP-2011-082; LHCB-PAPER-2011-005; CERN-PH-EP-2011-082; LHCB-PAPER-2011-005.- Geneva : CERN, 2011 - 22 p. - Published in : JHEP 08 (2011) 034 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference
9.
Determination of $f_s/f_d$ for 7 TeV $pp$ collisions and a measurement of the branching fraction of the decay $B^0 \to D^{-}K^{+}$ / LHCb Collaboration
The relative abundance of the three decay modes $B^0 \to D^- K^+$, $B^0 \to D^- \pi^+$ and $B^0_s \to D_s^- \pi^+$ produced in 7 TeV $pp$ collisions at the LHC is determined from data corresponding to an integrated luminosity of 35 pb$^{-1}$. The branching fraction of $B^0 \to D^- K^+$ is found to be $\cal B (B^0 \to D^- K^+) = (2.01 \pm 0.18^{\textrm{stat}} \pm 0.14^{\textrm{syst}})\times 10^{-4}$. [...]
arXiv:1106.4435; CERN-PH-EP-2011-075; LHCB-PAPER-2011-006; CERN-PH-EP-2011-075; LHCB-PAPER-2011-006.- Geneva : CERN, 2011 - 7 p. - Published in : Phys. Rev. Lett. 107 (2011) 211801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
10.
Search for the rare decays $B^{0}_{s} \to \mu^{+} \mu^{-}$ and $B^{0} \to \mu^{+} \mu^{-}$ / LHCb Collaboration
A search for the decays $B_{s}^{0}\to\mu^+\mu^-$ and $B^{0}\to\mu^+\mu^-$ is performed with about 37 pb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 7 TeV collected by the LHCb experiment at the Large Hadron Collider at CERN. The observed numbers of events are consistent with the background expectations. [...]
arXiv:1103.2465; CERN-PH-EP-2011-029; LHCb-PAPER-2011-004; LHCB-PAPER-2011-004; CERN-PH-EP-2011-029; LHCb-PAPER-2011-004.- Geneva : CERN, 2013-07-16 - 11 p. - Published in : Phys. Lett. B 699 (2011) 330-340 Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint

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