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2025-02-06
08:14
LCSR predictions for $b \to s$ hadronic form factors / Monceaux, Yann (IP2I, Lyon) ; Carvunis, Alexandre (IP2I, Lyon) ; Mahmoudi, Farvah (IP2I, Lyon ; CERN)
We address the calculation of mesonic $B \to P$ form factors where $P$ is a light pseudoscalar meson using Light-Cone Sum Rules with $B$-meson distribution amplitudes, and present preliminary resultsfor $B \to K$ form factors at zero momentum transfer..
2023 - 10 p. - Published in : PoS FPCP2023 (2023) 060 Fulltext: PDF;
In : 21st Conference on Flavor Physics and CP Violation (FPCP 2023), Villeurbanne, France, 29 May - 2 Jun 2023, pp.060

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2025-02-06
08:14
Searches for lepton flavour and lepton number violating K$^{+}$ decays at the NA62 experiment / Jerhot, Jan (Louvain U., CP3) /NA62 Collaboration
The NA62 experiment at CERN collected the world’s largest dataset of charged kaon decays to di-lepton final states in 2016-2018, using dedicated trigger lines. Upper limits on the rates of several K$^{+}$ decays violating lepton flavour and lepton number conservation, obtained by analysing this dataset, are reported..
2023 - 6 p. - Published in : J. Phys. : Conf. Ser. 2446 (2023) 012022 Fulltext: PDF;
In : International Conference on Kaon Physics 2022, Osaka, Japan, 13 - 16 Sep 2022, pp.012022

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2025-02-06
08:14
Measurement of the very rare $K^+ \pi^+\nu\bar\nu$ decay at the NA62 experiment / Brizioli, Francesco (CERN) /NA62 Collaboration
The $K^+ \pi^+\nu\bar\nu$ decay, with a very precisely predicted branching ratio of less than 10$^{-10}$, is among the best processes to reveal indirect effects of new physics. The NA62 experiment reports the branching ratio measurement $BR(K^+ \pi^+\nu\bar\nu)$= (1.06$^{+0.40}_{-0.34}$ | $_{stat} \pm$ 0.09|$_{syst}$) $\cdot$ 10$^{-10}$ at 68% CL, based on the observation of 20 signal candidates with an expected background of 7.0 events from the total data sample collected at the CERN SPS during 2016-2018.  This provides evidence for the very rare $K^+ \pi^+\nu\bar\nu$ decay, observed with a significance of 3.4$\sigma$. [...]
2023 - 6 p. - Published in : J. Phys. : Conf. Ser. 2446 (2023) 012002 Fulltext: PDF;
In : International Conference on Kaon Physics 2022, Osaka, Japan, 13 - 16 Sep 2022, pp.012002

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2025-02-06
08:14
Measurement of the rare decay $K^+ \to \pi^+ \mu^+\mu^-$ at the NA62 experiment / Koval, Michal (Charles U.) /NA62 Collaboration
The NA62 experiment at CERN reports results from the study of the flavour-changing neutral current decay $K^+ \to \pi^+ \mu^+\mu^-$ using a data sample recorded in 2017–2018 with a dedicated pre-scaled di-muon trigger. The sample comprises about 28k signal events with negligible background contamination, and the presented results include the most precise determination of the corresponding branching fraction and the form factor parameters..
2023 - 3 p. - Published in : J. Phys. : Conf. Ser. 2446 (2023) 012017 Fulltext: PDF;
In : International Conference on Kaon Physics 2022, Osaka, Japan, 13 - 16 Sep 2022, pp.012017

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2025-02-06
08:14
Search for $K^0 \to \mu^+\mu^-\mu^+\mu^-$ at the LHCb experiment / Fernández Gómez, Miguel (Santiago de Compostela U., IGFAE) /LHCb Collaboration
These proceedings discuss the search for $K^0_{S(L)} \to \mu^+\mu^-\mu^+\mu^-$ decays, performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.1 fb$^{-1}$. Upper limits are computed to be, at 90% C.L., $B(K^0_{S(L)} \to \mu^+\mu^-\mu^+\mu^-)$ < 5.1$\times$ 10$^{12}$ (2.3$\times$10$^{-9}$)
2023 - 6 p. - Published in : J. Phys. : Conf. Ser. 2446 (2023) 012018 Fulltext: PDF;
In : International Conference on Kaon Physics 2022, Osaka, Japan, 13 - 16 Sep 2022, pp.012018

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2025-02-06
08:14
Tests of Lepton Flavour Universality and searches for Lepton Flavour Violation at LHCb / Schmitt, Sebastian (RWTH Aachen U.) /LHCb Collaboration
Rare $b$-hadron decays serve as powerful probes for investigating Lepton Flavour Universality (LFU) and Lepton flavour violation. These decays, mediated through $b\to s\ell\ell$ transitions, allow for stringent tests of LFU, a fundamental symmetry of the Standard Model (SM) that assumes the universal coupling of electroweak gauge bosons to leptons. [...]
2023 - 6 p. - Published in : PoS: FPCP2023, pp. 051
Fulltext: PDF;
In : 21st Conference on Flavor Physics and CP Violation (FPCP 2023), Villeurbanne, France, 29 May - 2 Jun 2023, pp.051

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2025-02-06
08:14
The ALARIC parton shower / Reichelt, Daniel (Durham U., IPPP ; CERN)
Parton showers are important tools in the event generation chain for present and future colliders. Recently, their formally achieved accuracy has been under extended scrutiny. [...]
2024 - 10 p. - Published in : EPJ Web Conf. 315 (2024) 01019 Fulltext: PDF;
In : International Workshop on Future Linear Colliders (LCWS2024), Tokyo, Jp, 8 Jul - 8 Nov 2024, pp.01019

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2025-02-06
08:13
Decoding Higgs Boson Branching Ratios from event shapes / Reichelt, Daniel (Durham U., IPPP ; CERN)
This contribution will discuss a novel strategy for the simultaneous measurements of Higgs boson branching ratios into gluons and light quarks at a future lepton collider, operating in the Higgs-factory mode. The method is based on template fits to global event-shape observables, and in particular fractional energy correlations, thereby exploiting differences in the QCD radiation patterns of quarks and gluons. [...]
2024 - 9 p. - Published in : EPJ Web Conf. 315 (2024) 01003 Fulltext: PDF;
In : International Workshop on Future Linear Colliders (LCWS2024), Tokyo, Jp, 8 Jul - 8 Nov 2024, pp.01003

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2025-02-06
08:13
Measurement of the radiative decay $K^+ \to \pi^0 e^+ \nu\gamma$ at the NA62 experiment / Piccini, Mauro (INFN, Perugia) /NA62 Collaboration
The NA62 experiment at CERN reports results from a study of radiative kaon decay $K^+ \to \pi^0 e^+ \nu\gamma$ using a data sample recorded in the years 2017 and 2018. The sample comprises O(100k) candidates with sub-percent background contamination. [...]
2023 - 6 p. - Published in : J. Phys. : Conf. Ser. 2446 (2023) 012015 Fulltext: PDF;
In : International Conference on Kaon Physics 2022, Osaka, Japan, 13 - 16 Sep 2022, pp.012015

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2025-02-06
08:13
X-LAB: A very high-capacity X-band RF test stand facility at the University of Melbourne / Volpi, Matteo (Melbourne U.) ; Giansiracusa, Paul J (Melbourne U.) ; Sheehy, Suzanne L (Melbourne U. ; ANSTO, Menai) ; Rassoll, Roger P (Melbourne U.) ; Taylor, Geoffrey N (Melbourne U.) ; Pushkarna, Paarangat (Melbourne U.) ; Dowd, Rohan (ANSTO, Menai) ; Valerian, Joel (Melbourne U.) ; Catalan-Lasheras, Nuria (CERN) ; Cherrill, Mark (South Australia U.)
The X-band Laboratory for Accelerators and Beams (X-LAB) has been commissioned at the University of Melbourne. One of the key projects within this laboratory involves re-homing half of the CERN high gradient X-band test stand, XBOX3, now known as Mel-BOX. [...]
2024 - 9 p. - Published in : EPJ Web Conf. 315 (2024) 02007 Fulltext: PDF;
In : International Workshop on Future Linear Colliders (LCWS2024), Tokyo, Jp, 8 Jul - 8 Nov 2024, pp.02007

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