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An integrated flux-symmetric spectrometer-magnet system for the SND@LHC experiment upgrade
/ SND@LHC Collaboration
The proposed upgrade of the SND@LHC experiment for the High Luminosity phase of the LHC (HL-LHC) will strongly benefit from the presence of a magnetized region, allowing for muon momentum and chargemeasurement. In this paper we describe an iron core magnet system that is partly integrated with the calorimeter and that is designed to respect the strict constraints from the available space in the experimental cavern, power consumption, and field requirements.Semi-analytical tools are introduced to explore the parameter space, in order to define the primary design options. [...]
2024 - 26 p.
- Published in : JINST 19 (2024) P12002
Fulltext: PDF;
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Observation of collider neutrinos without final state muons with the SND@LHC experiment
/ Abbaneo, D. (CERN) ; Ahmad, S. (PINSTECH, Islamabad) ; Albanese, R. (INFN, Naples ; Naples U.) ; Alexandrov, A. (INFN, Naples ; Naples U.) ; Alicante, F. (INFN, Naples ; Naples U.) ; Androsov, K. (Ecole Polytechnique, Lausanne) ; Anokhina, A. ; Asada, T. (INFN, Naples ; Naples U.) ; Asawatangtrakuldee, C. (Chulalongkorn U.) ; Ayala Torres, M.A. (Andres Bello Natl. U.) et al.
/SND@LHC
We report the observation of neutrino interactions without final state muons at the LHC, with a significance of 6.4\,$\sigma$. A data set of proton-proton collisions at $\sqrt{s}= 13.6$\,TeV collected by \SND in 2022 and 2023 is used, corresponding to an integrated luminosity of 68.6\,fb$^{-1}$. [...]
arXiv:2411.18787; CERN-EP-2024-316.-
Geneva : CERN, 2024 - 7 p.
Draft (restricted): PDF; Fulltext: Observation_of_electron_neutrino_or_neutral_current_collider_events - PDF; CERN-EP-2024-316 - PDF; 2411.18787 - PDF;
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4.
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Observation of the $K^+ \to \pi^+ \nu \bar\nu$ decay and measurement of its branching ratio
/ Cortina Gil, Eduardo (Louvain U., CP3) ; Jerhot, Jan (Louvain U., CP3 ; Munich, Max Planck Inst.) ; Lurkin, Nicolas (Louvain U., CP3) ; Bryman, Douglas (British Columbia U. ; TRIUMF) ; Numao, Toshio (TRIUMF) ; Velghe, Bob (TRIUMF) ; Wong, Vincent Wai Sum (TRIUMF) ; Hives, Zdenko (Charles U.) ; Husek, Tomas (Charles U. ; Birmingham U.) ; Kampf, Karol (Charles U.) et al.
A measurement of the $K^+ \to \pi^+ \nu \bar\nu$ decay by the NA62 experiment at the CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to the beamline and detectors, at a higher instantaneous beam intensity with respect to the 2016–2018 data taking. [...]
arXiv:2412.12015; CERN-EP-2024-343.-
Geneva : CERN, 2024 - 29 p.
Draft (restricted): PDF; Fulltext: CERN-EP-2024-343 - PDF; 2412.12015 - PDF;
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Addendum to the AdvancedSND LoI
/ Abbaneo, D ; Albanese, R ; Alexandrov, A ; Alicante, F ; Androsov, K ; Anokhina, A ; Asada, T ; Asawatangtrakuldee, C ; Ayala Torres, M A ; Battilana, C et al.
Over the six months since the submission of the AdvSND LoI \cite{ADVSND_LOI}, the Collaboration has been intensively discussing with the CERN civil engineering team and the High Luminosity LHC (HL LHC) planning officers to fully understand the constraints related to the civil engineering modifications required for TI18 [...]
CERN-LHCC-2024-014 ; LHCC-I-040-ADD-1.
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2024.
Original Document (LHCC-I-040) - Full text
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First search for $K^+ \to \pi^0 \pi \mu e$ decays
/ NA62 Collaboration
The first search for the lepton number violating decay $K^+ \to \pi^0 \pi^- \mu^+ e^+$ and lepton flavour violating decays $K^+ \to \pi^0 \pi^+ \mu^- e^+$, $K^+ \to \pi^0 \pi^+ \mu^+ e^-$ has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of $2.9\times 10^{-10}$, $3.1 \times 10^{-10}$ and $5.0 \times 10^{-10}$, respectively, are obtained at 90% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions..
arXiv:2409.12981; CERN-EP-2024-224.-
Geneva : CERN, 2024-11-12 - 9 p.
- Published in : Phys. Lett. B 859 (2024) 139122
Draft (restricted): PDF; Fulltext: CERN-EP-2024-224 - PDF; 2409.12981 - PDF; Publication - PDF;
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NaNu: Proposal for a neutrino experiment at the SPS collider located at the North Area of CERN
/ Chouhan, Dhruv (U. Mainz, PRISMA) ; Neuhaus, Friedemann (U. Mainz, PRISMA) ; Schott, Matthias (U. Mainz, PRISMA) ; Stummer, Florian (CERN) ; Wang, Chen (U. Mainz, PRISMA) ; Wanke, Rainer (U. Mainz, PRISMA)
Several experiments have been proposed in the recent years to study the nature of tau neutrinos, in particular aiming for a first observation of tau anti-neutrinos, more stringent upper limit on its anomalous magnetic moment as well as new constrains on the strange-quark content of the nucleon. We propose here a new low-cost neutrino experiment at the CERN North area, named NaNu (North Area NeUtrino), compatible with the realization of the future SHADOWS and HIKE experiments at the same experimental area..
arXiv:2210.15532.-
2024-04-09 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1064 (2024) 169327
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AdvSND, The Advanced Scattering and NeutrinoDetector at High Lumi LHC Letter of Intent
/ Abbaneo, D ; Albanese, R ; Alexandrov, A ; Alicante, F ; Androsov, K ; Anokhina, A ; Asada, T ; Asawatangtrakuldee, C ; Ayala Torres, M A ; Battilana, C et al.
The SND@LHC experiment has been taking data at the LHC since the beginning of Run3 [...]
CERN-LHCC-2024-007 ; LHCC-I-040.
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2024.
Fulltext
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Workshop summary: Kaons@CERN 2023
/ Anzivino, G. (INFN, Perugia ; Perugia U.) ; Cuendis, Sergio Arguedas (Costa Rica U.) ; Bernard, V. (IJCLab, Orsay) ; Bijnens, J. (Lund U.) ; Bloch-Devaux, B. (Turin U.) ; Bordone, M. (CERN) ; Brizioli, F. (INFN, Perugia ; CERN) ; Brod, J. (Cincinnati U.) ; Camalich, J.M. (IAC, La Laguna ; Laguna U., Tenerife) ; Ceccucci, A. (CERN) et al.
Kaon physics is at a turning point -- while the rare-kaon experiments NA62 and KOTO are in full swing, the end of their lifetime is approaching and the future experimental landscape needs to be defined. With HIKE, KOTO-II and LHCb-Phase-II on the table and under scrutiny, it is a very good moment in time to take stock and contemplate about the opportunities these experiments and theoretical developments provide for particle physics in the coming decade and beyond. [...]
arXiv:2311.02923; CERN-TH-2023-206.-
2024-04-09 - 55 p.
- Published in : Eur. Phys. J. C
Fulltext: 2311.02923 - PDF; document - PDF;
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