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CERN Document Server 13 records found  1 - 10próximo  jump to record: Search took 0.56 seconds. 
1.
Probing third-generation New Physics with $K\to \pi \nu\bar\nu$ and $B\to K^{(*)} \nu\bar\nu$ / Allwicher, Lukas (Zurich U.) ; Bordone, Marzia (CERN) ; Isidori, Gino (Zurich U.) ; Piazza, Gioacchino (Zurich U.) ; Stanzione, Alfredo (INFN, Trieste ; SISSA, Trieste)
The recent observation of the $K^+ \to \pi^+ \nu\bar\nu$ decay by NA62 is an important milestone in precision flavor physics. [...]
arXiv:2410.21444. - 10.
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2.
New strategies for probing $B\to D^\ast \ell\bar\nu_\ell$ lattice and experimental data / Bordone, Marzia (CERN) ; Juttner, Andreas (U. Southampton (main) ; CERN)
We present an analysis of the exclusive semileptonic decay $B\to D^\ast \ell\bar\nu_\ell$ based on the Belle and Belle II data made public in 2023, combined with recent lattice-QCD calculations of the hadronic transition form factors by FNAL/MILC, HPQCD and JLQCD. [...]
CERN-TH-2024-083 ; arXiv:2406.10074. - 36 p.
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3.
Short- vs. long-distance physics in $B\rightarrow K^{(*)} \ell ^+\ell ^-$: a data-driven analysis / Bordone, Marzia (CERN) ; isidori, Gino (Zurich U.) ; Mächler, Sandro (Zurich U.) ; Tinari, Arianna (Zurich U.)
We analyze data on $B\to K\mu^+\mu^-$ and $B\to K^*\mu^+\mu^-$ decays in the whole dilepton invariant mass spectrum with the aim of disentangling short- vs. long-distance contributions. [...]
arXiv:2401.18007; CERN-TH-2024-017.- 2024-05-31 - 13 p. - Published in : Eur. Phys. J. C 84 (2024) 547 Fulltext: 2401.18007 - PDF; document - PDF;
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4.
Focus topics for the ECFA study on Higgs / Top / EW factories / de Blas, Jorge (Granada U.) ; Koppenburg, Patrick (Nikhef, Amsterdam) ; List, Jenny (DESY) ; Maltoni, Fabio (Louvain U.) ; Maestre, Juan Alcaraz (Madrid, CIEMAT) ; Alimena, Juliette (DESY) ; Alison, John (Carnegie Mellon U.) ; Azzi, Patrizia (INFN, Padua) ; Azzurri, Paolo (INFN, Pisa) ; Bagnaschi, Emanuele (CERN ; INFN, Italy) et al.
In order to stimulate new engagement and trigger some concrete studies in areas where further work would be beneficial towards fully understanding the physics potential of an $e^+e^-$ Higgs / Top / Electroweak factory, we propose to define a set of focus topics. [...]
arXiv:2401.07564. - 65.
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5.
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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6.
QED effects in inclusive semi-leptonic $B$ decays / Bigi, Dante (CERN ; Turin U. ; Munich, Max Planck Inst. ; Munich, Tech. U.) ; Bordone, Marzia (CERN) ; Gambino, Paolo (Turin U. ; Munich, Max Planck Inst. ; Munich, Tech. U.) ; Haisch, Ulrich (Munich, Max Planck Inst.) ; Piccione, Andrea (Turin U.)
We analyse in detail the QED corrections to the total decay width and the moments of the electron energy spectrum of the inclusive semi-leptonic $B \to X_c e \nu$ decay. Our calculation includes short-distance electroweak corrections, the complete ${\cal O}(\alpha)$ partonic terms and leading-logarithmic QED effects up to ${\cal O}(\Lambda^3_{\rm QCD}/m_b^3)$. [...]
arXiv:2309.02849; CERN-TH-2023-145; MPP-2023-186.- 2023-11-22 - 41 p. - Published in : JHEP 2311 (2023) 163 Fulltext: document - PDF; 2309.02849 - PDF;
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7.
$\tau _{B_{s}}/\tau _{B_{d}}$ and $\Delta \Gamma _{s}$ confront new physics in $b\rightarrow s\tau \tau $ / Bordone, Marzia (CERN) ; Fernández Navarro, Mario (Southampton U.)
Several new physics scenarios that address anomalies in $B$-physics predict an enhancement of $b \rightarrow s \tau \tau$ with respect to its Standard Model prediction. Such scenarios necessarily imply modifications of the lifetime ratio $\tau_{B_{s}}/\tau_{B_{d}}$ and the lifetime difference $\Delta\Gamma_{s}$. [...]
arXiv:2307.07013; CERN-TH-2023-138.- 2023-09-22 - 13 p. - Published in : Eur. Phys. J. C 83 (2023) 842 Fulltext: 2307.07013 - PDF; document - PDF;
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8.
New sum rules for the B$_{c}$→ J/ψ form factors / Bordone, Marzia (CERN) ; Khodjamirian, Alexander (Siegen U.) ; Mannel, Th. (Siegen U.)
We derive new sum rules for the form factors of the $B_c\to J/\psi\, \ell \bar{\nu}_\ell$ semileptonic transitions, employing the vacuum-to-$B_c$ correlation function of the $J/\psi$-interpolating and $b\to c$ weak currents. In the heavy quark limit and at a space-like momentum transfer to the weak current, a local operator-product expansion is valid for this correlation function. [...]
arXiv:2209.08851; SI-HEP-2022-26; P3H-22-094; CERN-TH-2022-144.- 2023-01-09 - 31 p. - Published in : JHEP 2301 (2023) 032 Fulltext: document - PDF; Publication - PDF; 2209.08851 - PDF;
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9.
Dispersive analysis of Λ$_{b}$ → Λ(1520) local form factors / Amhis, Yasmine (IJCLab, Orsay) ; Bordone, Marzia (CERN) ; Reboud, Méril (Munich, Tech. U.)
We perform an analysis of $\Lb\to\L(1520)$ local form factors. We use dispersive techniques to provide a model-independent parametrisation of the form factors that can be used in the whole kinematic region. [...]
arXiv:2208.08937; CERN-TH-2022-130; TUM-HEP-1422/22; EOS-2022-03.- Geneva : CERN, 2023-02-01 - 21 p. - Published in : JHEP 2302 (2023) 010 Fulltext: document - PDF; 2208.08937 - PDF;
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10.
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New ideas in rare decays ($b,c,s$), proposals for new measurements / Bordone, Marzia (speaker) (CERN)
2022 - 1403. Conferences; 10th Edition of the Large Hadron Collider Physics Conference External links: Talk details; Event details In : 10th Edition of the Large Hadron Collider Physics Conference
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