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Search for $^{22}$Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes / Fougères, Chloé (GANIL ; Argonne, PHY) ; de Oliveira Santos, François (GANIL) ; José, Jordi (Barcelona U. ; Barcelona, IEEC) ; Michelagnoli, Caterina (Laue-Langevin Inst.) ; Clément, Emmanuel (GANIL) ; Kim, Yung Hee (GANIL ; IBS, Daejeon, CENS) ; Lemasson, Antoine (GANIL) ; Guimarães, Valdir (Sao Paulo U.) ; Barrientos, Diego (CERN) ; Bemmerer, Daniel (HZDR, Dresden) et al.
Classical novae are thermonuclear explosions in stellar binary systems, and important sources of $^{26}$Al and $^{22}$Na. While gamma rays from the decay of the former radioisotope have been observed throughout the Galaxy, $^{22}$Na remains untraceable. [...]
arXiv:2212.06302.- 2023-09-05 - 18 p. - Published in : Nature Commun. 14 (2023) 4536 Fulltext: document - PDF; 2212.06302 - PDF;

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Measuring beam size with the LHC Beam Gas Vertex detector / Würkner, Benedikt (CERN) ; Alexopoulos, Andreas (CERN) ; Barschel, Colin (CERN) ; Bay, Aurelio (Ecole Polytechnique, Lausanne) ; Blanc, Frederic (Ecole Polytechnique, Lausanne) ; Bravin, Enrico (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chritin, Nicolas (CERN) ; Dehning, Bernd (CERN) ; Ferro-Luzzi, Massimiliano (CERN) et al.
The Beam Gas Vertex detector (BGV) is an innovative beam profile monitor being developed as part of the High Luminosity LHC (HL-LHC) project at CERN. The goal is to continually measure the transverse beam size by reconstructing tracks originating from beam-gas interactions using high precision tracking detectors. [...]
CERN-ACC-2019-205.- 2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-WEPGW084 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPGW084

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Amplitude analysis of the $B^+ \to \pi^+ \pi^+ \pi^-$ decay / LHCb Collaboration
The results of an amplitude analysis of the charmless three-body decay $B^+ \to \pi^+ \pi^+ \pi^-$, in which $CP$-violation effects are taken into account, are reported. The analysis is based on a data sample corresponding to an integrated luminosity of $3 \; {\rm fb}^{-1}$ of $pp$ collisions recorded with the LHCb detector. [...]
arXiv:1909.05212; LHCb-PAPER-2019-017; CERN-EP-2019-157; LHCB-PAPER-2019-017.- Geneva : CERN, 2020-01-21 - 46 p. - Published in : Phys. Rev. D 101 (2020) 012006 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Observation of several sources of $CP$ violation in $B^+ \to \pi^+ \pi^+ \pi^-$ decays / LHCb Collaboration
Observations are reported of different sources of $CP$ violation from an amplitude analysis of $B^+ \to \pi^+ \pi^+ \pi^-$ decays, based on a data sample corresponding to an integrated luminosity of $3 \; {\rm fb}^{-1}$ of $pp$ collisions recorded with the LHCb detector. A large $CP$ asymmetry is observed in the decay amplitude involving the tensor $f_2(1270)$ resonance, and in addition significant $CP$ violation is found in the $\pi^+ \pi^-$ S-wave at low invariant mass. [...]
arXiv:1909.05211; LHCb-PAPER-2019-018; CERN-EP-2019-156; LHCB-PAPER-2019-018.- 2020-01-21 - 11 p. - Published in : Phys. Rev. Lett. 124 (2020) 031801 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;

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Noninvasive LHC transverse beam size measurement using inelastic beam-gas interactions / Alexopoulos, A (CERN) ; Barschel, C (CERN) ; Bravin, E (CERN) ; Bregliozzi, G (CERN) ; Chritin, N (CERN) ; Dehning, B (CERN) ; Ferro-Luzzi, M (CERN) ; Giovannozzi, M (CERN) ; Jacobsson, R (CERN) ; Jensen, L (CERN) et al. /BGV
The beam-gas vertex (BGV) detector is an innovative instrument measuring noninvasively the transverse beam size in the Large Hadron Collider (LHC) using reconstructed tracks from beam-gas interactions. The BGV detector was installed in 2016 as part of the R&D; for the High-Luminosity LHC project. [...]
2019 - 15 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 042801 Fulltext from Publisher: PDF;

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Measurement of $\psi(2S)$ production cross-sections in proton-proton collisions at $\sqrt{s} = 7$ and 13 TeV / LHCb Collaboration
The cross-sections of $\psi(2S)$ meson production in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$ are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of $275~p\mathrm{b}^{-1}$. The production cross-sections for prompt $\psi(2S)$ mesons and those for $\psi(2S)$ mesons from $b$-hadron decays ($\psi{(2S)}\mathrm{-from-}b$) are determined as functions of the transverse momentum, $p_{\mathrm{T}}$, and the rapidity, $y$, of the $\psi(2S)$ meson in the kinematic range $2<p_{\mathrm{T}}<20~\mathrm{GeV}/c$ and $2.0<y<4.5$. [...]
arXiv:1908.03099; CERN-EP-2019-150; LHCb-PAPER-2018-049.- Geneva : CERN, 2020-02-28 - 23 p. - Published in : Eur. Phys. J. C 80 (2020) 185 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;

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Measurement of CP violation in the $B_s^0\rightarrow\phi\phi$ decay and search for the $B^0\rightarrow\phi\phi$ decay / LHCb Collaboration
A measurement of the time-dependent CP-violating asymmetry in $B_s^0\rightarrow\phi\phi$ decays is presented. Using a sample of proton-proton collision data corresponding to an integrated luminosity of $5.0$fb$^{-1}$ collected by the $\mbox{LHCb}$ experiment at centre-of-mass energies $\sqrt{s} = 7$ TeV in 2011, 8 TeV in 2012 and 13 TeV in 2015 and 2016, a signal yield of around 9000 $B_s^0\rightarrow\phi\phi$ decays is obtained. [...]
arXiv:1907.10003; LHCb-PAPER-2019-019; CERN-EP-2019-121; LHCB-PAPER-2019-019.- Geneva : CERN, 2019-12-23 - 34 p. - Published in : JHEP 12 (2019) 155 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;

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Precision measurement of the $\Lambda_c^+$, $\Xi_c^+$ and $\Xi_c^0$ baryon lifetimes / LHCb Collaboration
We report measurements of the lifetimes of the $\Lambda_c^+$, $\Xi_c^+$ and $\Xi_c^0$ charm baryons using proton-proton collision data at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb$^{-1}$, collected by the LHCb experiment. The charm baryons are reconstructed through the decays $\Lambda_c^+\to pK^-\pi^+$, $\Xi_c^+\to pK^-\pi^+$ and $\Xi_c^0\to pK^-K^-\pi^+$, and originate from semimuonic decays of beauty baryons. [...]
arXiv:1906.08350; LHCb-PAPER-2019-008; CERN-EP-2019-122; LHCB-PAPER-2019-008.- 2019-08-02 - 12 p. - Published in : Phys. Rev. D 100 (2019) 032001 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Measurement of $C\!P$ observables in the process $B^0 \to DK^{*0}$ with two- and four-body $D$ decays / LHCb Collaboration
Measurements of $C\!P$ observables in $B^0 \to DK^{*0}$ decays are presented, where $D$ represents a superposition of $D^0$ and $\bar{D}^0$ states. The $D$ meson is reconstructed in the two-body final states $K^+\pi^-$, $\pi^+ K^-$, $K^+K^-$ and $\pi^+\pi^-$, and, for the first time, in the four-body final states $K^+\pi^-\pi^+\pi^-$, $\pi^+ K^-\pi^+\pi^-$ and $\pi^+\pi^-\pi^+\pi^-$. [...]
arXiv:1906.08297; LHCb-PAPER-2019-021; CERN-EP-2019-111.- Geneva : CERN, 2019-08-07 - 30 p. - Published in : JHEP 1908 (2019) 041 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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10.

Amplitude analysis of $B^\pm \to \pi^\pm K^+ K^-$ decays / LHCb Collaboration
The first amplitude analysis of the $B^\pm \to \pi^\pm K^+ K^-$ decay is reported based on a data sample corresponding to an integrated luminosity of 3.0 fb$^{−1}$ of $pp$ collisions recorded in 2011 and 2012 with the LHCb detector. The data is found to be best described by a coherent sum of five resonant structures plus a nonresonant component and a contribution from $\pi \pi \leftrightarrow KK$ $S$-wave rescattering. [...]
arXiv:1905.09244; LHCb-PAPER-2018-051; CERN-EP-2019-062; LHCB-PAPER-2018-051.- Geneva : CERN, 2019-12-07 - 11 p. - Published in : Phys. Rev. Lett. 123 (2019) 231802 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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Vegeu també: autors amb noms similars
32	Guimaraes, V
9	Guimaraes, V Salustino
2	Guimaraes, Valdir
9	Guimarães, V Salustino
2	Guimarães, Valdir

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