Results 31 to 40 of about 76,653 (166)
To understand the rare decay Bs→π+π−ℓ+ℓ−
Physics Letters B, 2015 Motivated by the LHCb measurement, we analyze the Bs→π+π−ℓ+ℓ− decay in the kinematics region where the pion pairs have invariant masses in the range 0.5–1.3 GeV and muon pairs do not originate from a resonance.
Wei Wang, Rui-Lin Zhu
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EPJ Web of Conferences, 2017 I review rare kaon decays. I introduce the flavor problem and possible solutions. Very rare kaon decays like K → πvv¯ are very important to this purpose: we study also K → πl+l-, K → ππee where chiral dynamics is important to disentangle short distance effects. We discuss also the decays K0 → μ+μ-, which have received recently some attention due to the
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Study of the rare decay K±→π±γγ
EPJ Web of Conferences, 2014 The NA62 and NA48/2 experiments at CERN collected a large sample of charged kaon decays with a low intensity beam and minimum bias trigger conditions in 2004 (NA48/2) and 2007 (NA62).
Cassese Antonio
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Journal of High Energy PhysicsIf neutrinoless double beta decay is discovered, the next natural step would be understanding the lepton number violating physics responsible for it. Several alternatives exist beyond the exchange of light neutrinos.
The NEXT collaboration +110 more
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Highly sensitive bolometers for rare alpha decay studies
EPJ Web of Conferences, 2014 High resolution detectors able to identify background events are very appealing in the study of rare nuclear processes. Scintillating bolometers featuring simultaneous read-out of heat and scintillation signals, can effectively address this problem ...
Gironi L.
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Precision measurements with kaon and pion decays at CERN [PDF]
EPJ Web of ConferencesThe NA62 measurement of the branching ratio and the di-photon mass spectrum of the K+ → π+γγ decay is presented, together with a preliminary result on the branching fraction of the rare decay π0 → e+e−.
Bizzeti Andrea
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Scholarpedia, 2016 Rare decays of b hadrons provide a powerful way of identifying contributions from physics beyond the Standard Model, in particular from new hypothetical particles too heavy to be produced at colliders. The most relevant experimental measurements are reviewed and possible interpretations are briefly discussed.
Patrick Koppenburg +2 more
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Annual Review of Nuclear and Particle Science, 2021 Historically important in the development of the Standard Model (SM) of particle physics, rare kaon decays are still a privileged tool for looking beyond it. The main reasons to continue the study of rare kaon decays are to test the CKM quark-mixing and CP-violation paradigm, to make quantitative comparisons with the B sector, and to search for ...
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Rare kaon decays on the lattice
Physics Letters B, 2006 We show that long distance contributions to the rare decays K -> pi nu nu-bar and K -> pi l+ l- can be computed using lattice QCD. The proposed approach requires well established methods, successfully applied in the calculations of electromagnetic and semileptonic form factors.
Gino Isidori +2 more
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Rare and Semi-Rare Decays in ATLAS [PDF]
Proceedings of European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2019), 2020 Flavour-changing neutral-current (FCNC) processes like $b \to s\,\mu^+\mu^-$ and $B_{(s)}^0 \to \mu^+\mu^-$ are suppressed in the Standard Model (SM) and thus sensitive to New Physics (NP) effects. This contribution summarises ATLAS results from the angular analysis of the $B^0 \to K^* \mu^+\mu^-$ decay performed with LHC Run 1 data, the $\cal B(B_{(s)}
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