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CERN Preprints

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2023-02-03
04:40
ALICE upgrades during the LHC Long Shutdown 2
A Large Ion Collider Experiment (ALICE) has been conceived and constructed as a heavy-ion experiment at the LHC. [...]
CERN-EP-2023-009 ; arXiv:2302.01238.
- 151 p.
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2023-02-03
04:40
Massive three-loop form factors: anomaly contribution / Fael, Matteo (CERN) ; Lange, Fabian (KIT, Karlsruhe, TTP ; KIT, Karlsruhe, IAP) ; Schönwald, Kay (Zurich U.) ; Steinhauser, Matthias (KIT, Karlsruhe, TTP)
We compute three-loop corrections to the singlet form factors for massive quarks using a semi-analytic method which provides precise results over the whole kinematic range. [...]
CERN-TH-2023-012 ; P3H-23-006 ; TTP23-002 ; ZU-TH 05/23 ; arXiv:2302.00693.
- 38 p.
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2023-02-03
04:39
STE-QUEST: Space Time Explorer and QUantum Equivalence principle Space Test / Ahlers, Holger ; Badurina, Leonardo ; Bassi, Angelo ; Battelier, Baptiste ; Beaufils, Quentin ; Bongs, Kai ; Bouyer, Philippe ; Braxmaier, Claus ; Buchmueller, Oliver ; Carlesso, Matteo et al.
An M-class mission proposal in response to the 2021 call in ESA's science programme with a broad range of objectives in fundamental physics, which include testing the Equivalence Principle and Lorentz Invariance, searching for Ultralight Dark Matter and probing Quantum Mechanics..
arXiv:2211.15412 ; CERN-TH-2022-202.
- 78 p.
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2023-02-03
04:39
Commissioning and Performance of the New ALICE Inner Tracking System in the First Phase of LHC Run 3 / Ravasenga, Ivan (Lund U. ; CERN)
ALICE is one of the four experiments at the CERN Large Hadron Collider (LHC) specifically designed to study nuclear matter at extreme conditions of temperature and pressure. [...]
arXiv:2302.00432.
- 12 p.
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2023-02-03
04:39
Calibration of the Upgraded ALICE Inner Tracking System / Triolo, Andrea Sofia
The ALICE Experiment has replaced its Inner Tracking System with a 7-layer pixel-only tracker made out of more than 24000 monolithic active pixel sensor chips, in order to fulfill the requirements of the physics program of the LHC Run 3. [...]
arXiv:2302.00433.
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2023-02-03
04:39
Symmetry plane correlations in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$TeV
A newly developed observable for correlations between symmetry planes, which characterize the direction of the anisotropic emission of produced particles, is measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV with ALICE. [...]
CERN-EP-2023-012 ; arXiv:2302.01234.
- 21 p.
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2023-02-03
04:38
Gravitoelectromagnetic quadrirefringence and the binaries rainbow / Romano, Antonio Enea (King's Coll. London ; CERN ; ICRA, Pescara) ; Vallejo-Peña, Sergio A. (ICRA, Pescara)
The interaction between gravitational waves (GW) and electromagnetic waves (EMW) produces quadrirefringence, a phenomenon consisting in a frequency and polarization dependency of the speed of GW and EMW. [...]
CERN-TH-2023-013 ; arXiv:2301.11304.
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2023-02-03
04:36
A unified effective approach to cosmological perturbations / Romano, Antonio Enea (ICRA, Pescara)
A unified model independent effective description of cosmological perturbations is derived in terms of two effective quantities, playing the role of effective propagation speeds of curvature perturbations and gravitational waves, encoding the effects of the interaction of perturbations at any order, and inducing a modification of the friction term of the perturbations propagation equation. [...]
CERN-TH-2023-006 ; arXiv:2301.05679.
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2023-02-02
19:31
Observation of single-top-quark production in association with a photon using the ATLAS detector
This Letter reports the observation of single top quarks produced together with a photon using 139 fb$^{-1}$ of 13 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. [...]
CERN-EP-2022-229 ; arXiv:2302.01283.
- 2023. - 16 p, 16 p.
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2023-02-02
04:22
Prospects for Future Binary Black Hole GW Studies in Light of PTA Measurements / Ellis, John ; Fairbairn, Malcolm ; Hütsi, Gert ; Raidal, Martti ; Urrutia, Juan ; Vaskonen, Ville ; Veermäe, Hardi
NANOGrav and other Pulsar Timing Arrays (PTAs) have discovered a common-spectrum process in the nHz range that may be due to gravitational waves (GWs): if so, they are likely to have been generated by black hole (BH) binaries with total masses $> 10^9 M_{\odot}$. [...]
KCL-PH-TH/2023-04 ; CERN-TH-2023-008 ; AION-REPORT/2023-1 ; arXiv:2301.13854.
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