CERN Accelerating science

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1.
Pixel detector hybridisation and integration with anisotropic conductive adhesives / Volker, Alexander (CERN) ; Schmidt, Janis Viktor (CERN) ; Dannheim, Dominik (CERN) ; Svihra, Peter (CERN) ; Pinto, Mateus Vicente Barreto (Geneva U.) ; de Oliveira, Rui (CERN) ; Braach, Justus (CERN) ; Yang, Xiao (CERN) ; Ruat, Marie (ESRF, Grenoble) ; Magalhaes, Débora (ESRF, Grenoble ; DESY) et al.
A reliable and cost-effective interconnect technology is required for the development of hybrid pixel detectors. The interconnect technology needs to be adapted for the pitch and die sizes of the respective applications. [...]
arXiv:2312.09883.- 2024-05-13 - 13 p. - Published in : JINST 19 (2024) C05024 Fulltext: 2312.09883 - PDF; Publication - PDF;
In : 16th Topical Seminar on Innovative Particle and Radiation Detectors, Siena, Italy, 25 - 29 Sep 2023, pp.C05024
2.
Annual Report 2023 and Phase-I Closeout / Aglieri Rinella, Gianluca
This report summarises the activities of the CERN strategic R&D programme on technologies for future experiments during the year 2023, and highlights the achievements of the programme during its first phase 2020-2023..
CERN-EP-RDET-2024-001 - 208.

3.
Intensified Tpx3Cam, a fast data-driven optical camera with nanosecond timing resolution for single photon detection in quantum applications / Nomerotski, Andrei (Brookhaven) ; Chekhlov, Matthew (Brookhaven) ; Dolzhenko, Denis (Brookhaven) ; Glazenborg, Rene (Photonis, Brive) ; Farella, Brianna (Brookhaven) ; Keach, Michael (Brookhaven) ; Mahon, Ryan (Brookhaven) ; Orlov, Dmitry (Photonis, Brive) ; Svihra, Peter (Prague, Tech. U. ; CERN)
We describe a fast data-driven optical camera, Tpx3Cam, with nanosecond scale timing resolution and 80 Mpixel/sec throughput. After the addition of intensifier, the camera is single photon sensitive with quantum efficiency determined primarily by the intensifier photocathode. [...]
arXiv:2210.13713.- 2023-01-17 - 13 p. - Published in : JINST 18 (2023) C01023 Fulltext: PDF;
In : 23rd International Workshop for Radiation Imaging Detectors, Riva Del Garda, It, 26 - 30 Jun 2022, pp.C01023
4.
Test-beam Performance Results of the FASTPIX Sub-Nanosecond CMOS Pixel Sensor Demonstrator / Braach, Justus (CERN ; Hamburg U.) ; Buschmann, Eric (CERN) ; Dannheim, Dominik (CERN) ; Dort, Katharina (CERN ; Giessen U., Inst. Kernphys.) ; Kugathasan, Thanushan (Geneva U.) ; Munker, Magdalena (Geneva U.) ; Snoeys, Walter (CERN) ; Švihra, Peter (CERN) ; Vicente, Mateus (CERN ; Geneva U.)
Within the ATTRACT FASTPIX project, a monolithic pixel sensor demonstrator chip has been developed in a modified 180 nm CMOS imaging process technology, targeting sub-nanosecond timing precision for single ionising particles. It features a small collection electrode design on a 25 micrometers-thick epitaxial layer and contains 32 mini matrices of 68 hexagonal pixels each, with pixel pitches ranging from 8.66 to 20 micrometers. [...]
arXiv:2306.05938.- 2023-09-09 - 15 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1056 (2023) 168641 Fulltext: PDF;
5.
The LHCb upgrade I / LHCb Collaboration
The LHCb upgrade represents a major change of the experiment. The detectors have been almost completely renewed to allow running at an instantaneous luminosity five times larger than that of the previous running periods. [...]
arXiv:2305.10515; LHCb-DP-2022-002.- 2024-05-23 - 232 p. - Published in : JINST 19 (2024) P05065 Fulltext: document - PDF; 2305.10515 - PDF;
In : The Large Hadron Collider and The Experiments for Run 3
6.
Measurement of $\Xi^{+}_{c}$ production in pPb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV at LHCb / LHCb Collaboration
A study of prompt $\Xi_{c}^{+}$ production in proton-lead collisions is performed with the LHCb experiment at a centre-of-mass energy per nucleon pair of 8.16 TeV in 2016 in $p$Pb and Pb$p$ collisions with an estimated integrated luminosity of approximately 12.5 and 17.4 nb$^{-1}$, respectively. The $\Xi_{c}^{+}$ production cross-section, as well as the $\Xi_{c}^{+}$ to $\Lambda_{c}^{+}$ production cross-section ratio, are measured as a function of the transverse momentum and rapidity and compared to latest theory predictions. [...]
arXiv:2305.06711; LHCb-PAPER-2022-041; CERN-EP-2023-057.- Geneva : CERN, 2024-04-01 - 20 p. - Published in : Phys. Rev. C 109 (2024) 044901 Fulltext: Publication - PDF; 2305.06711 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
7.
Quantifying high-dimensional spatial entanglement with a single-photon-sensitive time-stamping camera / Courme, Baptiste (Paris, INSP ; Paris, Lab. Kastler Brossel) ; Vernière, Chloé (Paris, INSP) ; Svihra, Peter (Prague, Tech. U. ; CERN) ; Gigan, Sylvain (Paris, Lab. Kastler Brossel) ; Nomerotski, Andrei (Brookhaven Natl. Lab.) ; Defienne, Hugo (Paris, INSP)
High-dimensional entanglement is a promising resource for quantum technologies. Being able to certify it for any quantum state is essential. [...]
arXiv:2302.03756.- 2023-06-21 - 4 p. - Published in : Opt. Lett. 48 (2023) 3439-3442 Fulltext: PDF;
8.
Measurement of the ratios of branching fractions $\mathcal{R}(D^{*})$ and $\mathcal{R}(D^{0})$ / LHCb Collaboration
The ratios of branching fractions $\mathcal{R}(D^{*})\equiv\mathcal{B}(\bar{B}\to D^{*}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(\bar{B}\to D^{*}\mu^{-}\bar{\nu}_{\mu})$ and $\mathcal{R}(D^{0})\equiv\mathcal{B}(B^{-}\to D^{0}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(B^{-}\to D^{0}\mu^{-}\bar{\nu}_{\mu})$ are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb${ }^{-1}$ of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode $\tau^{-}\to\mu^{-}\nu_{\tau}\bar{\nu}_{\mu}$. [...]
arXiv:2302.02886; LHCb-PAPER-2022-039; CERN-EP-2022-284.- Geneva : CERN, 2023-09-13 - 13 p. - Published in : Phys. Rev. Lett. 131 (2023) 111802 Fulltext: LHCb-PAPER-2022-039 - PDF; Publication - PDF; 2302.02886 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
9.
A study of $C\!P$ violation in the decays $B^\pm\to[K^+K^-\pi^+\pi^-]_D h^{\pm}$ ($h = K, \pi$) and $B^\pm\to[\pi^+\pi^-\pi^+\pi^-]_D h^{\pm}$ / LHCb Collaboration
The first study of $C\!P$ violation in the decay mode $B^\pm\to[K^+K^-\pi^+\pi^-]_D h^{\pm}$, with $h=K,\pi$, is presented, exploiting a data sample of proton-proton collisions collected by the LHCb experiment that corresponds to an integrated luminosity of $9$ fb$^{-1}$. The analysis is performed in bins of phase space, which are optimised for sensitivity to local $C\!P$ asymmetries. [...]
arXiv:2301.10328; LHCb-PAPER-2022-037; CERN-EP-2022-285.- Geneva : CERN, 2023-06-29 - 28 p. - Published in : Eur. Phys. J. C
Fulltext: 2301.10328 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
10.
First observation and branching fraction measurement of the $\Lambda_b^0\to D_s^- p$ decayFirst observation and branching fraction measurement of the $ {\Lambda}_b^0\to {D}_s^{-}p $ decay / LHCb Collaboration
The first observation of the $\Lambda_b^0\to D_s^- p$ decay is presented using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of ${\sqrt{s}=13 \,\textrm{TeV}}$, corresponding to a total integrated luminosity of $6\,\textrm{fb}^{-1}$. Using the $\Lambda_b^0\to\Lambda_c^+\pi^-$ decay as the normalisation mode, the branching fraction of the $\Lambda_b^0\to D_s^- p$ decay is measured to be ${\mathcal{B}(\Lambda_b^0\to D_s^- p)=(12.6 \pm 0.5 \pm 0.3 \pm 1.2 )\times 10^{-6}}$, where the first uncertainty is statistical, the second systematic and the third due to uncertainties in the branching fractions of the $\Lambda_b^0\to\Lambda_c^+\pi^-$, $D_s^- \to K^-K^+\pi^-$ and $\Lambda_c^+\to p K^- \pi^+$ decays..
arXiv:2212.12574; LHCb-PAPER-2022-038; CERN-EP-2022-272; LHCB-PAPER-2022-038.- Geneva : CERN, 2023-07-10 - 18 p. - Published in : JHEP 2307 (2023) 075 Fulltext: 2212.12574 - PDF; document - PDF; Paper_Lb2Dsp_v3.0 - PDF; Related data file(s): ZIP;

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