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ICHEP 2024

17โ€“24 Jul 2024
Prague
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Session

Quark and Lepton Flavour Physics

18 Jul 2024, 08:30
South Hall 1B

South Hall 1B

Conveners

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Weimin Song (Jilin University College of Physics (CN))
  • Tomas Jakoubek (Weizmann Institute of Science (IL))

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Lucia Grillo (University of Glasgow (GB))
  • Stefan Schacht (University of Manchester)

Quark and Lepton Flavour Physics

  • Tomas Jakoubek (Weizmann Institute of Science (IL))
  • Weimin Song (Jilin University College of Physics (CN))

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Lucia Grillo (University of Glasgow (GB))
  • Stefan Schacht (University of Manchester)

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Weimin Song (Jilin University College of Physics (CN))
  • Stefan Schacht (University of Manchester)

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Tomas Jakoubek (Weizmann Institute of Science (IL))
  • Lucia Grillo (University of Glasgow (GB))

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Tomas Jakoubek (Weizmann Institute of Science (IL))
  • Lucia Grillo (University of Glasgow (GB))

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Stefan Schacht (University of Manchester)
  • Weimin Song (Jilin University College of Physics (CN))

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Lucia Grillo (University of Glasgow (GB))
  • Weimin Song (Jilin University College of Physics (CN))

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Tomas Jakoubek (Weizmann Institute of Science (IL))
  • Stefan Schacht (University of Manchester)

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Weimin Song (Jilin University College of Physics (CN))
  • Stefan Schacht (University of Manchester)

Quark and Lepton Flavour Physics: Quark and Lepton Flavour Physics

  • Lucia Grillo (University of Glasgow (GB))
  • Tomas Jakoubek (Weizmann Institute of Science (IL))

Presentation materials

There are no materials yet.

  1. 477. Search for Physics beyond the Standard Model at NA62
    Renato Fiorenza (Scuola Superiore Meridionale e INFN Sezione di Napoli)
    18/07/2024, 08:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Rare kaon decays are among the most sensitive probes of both heavy and light new physics beyond the Standard Model description thanks to high precision of the Standard Model predictions, availability of very large datasets, and the relatively simple decay topologies. The $K^{+} \rightarrow \pi^{+}\nu\bar{\nu}$ decay is a โ€œgolden modeโ€ for search of New Physics in the flavour sector. The...

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  2. 479. New results from analyses of rare kaon and pion decays at the NA62 experiment
    Atakan Tugberk Akmete (Johannes Gutenberg Universitaet Mainz (DE))
    18/07/2024, 08:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The NA62 experiment at CERN reports new results from the analyses of rare kaon and pion decays, using data samples collected in 2017-2018. A sample of $K^+ \rightarrow \pi^+ \gamma \gamma$ decays was collected using a minimum-bias trigger, and the results include measurement of the branching ratio, study of the di-photon mass spectrum, and the first search for production and prompt decay of an...

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  3. 898. The search for $K_L โ†’ \pi^0\nu\overline{\nu}$ in the KOTO experiment
    Joseph Redeker
    18/07/2024, 09:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The KOTO experiment at J-PARC searches for the rare decay, $K_L โ†’ ฯ€^0ฮฝ\overlineฮฝ$. The mode is CP-violating, with a theoretical branching ratio highly suppressed in the Standard Model at $(2.94 ยฑ 0.15) ร— 10^{โˆ’11}$. With a small theoretical uncertainty, this search is sensitive to new physics. In the analysis of 2016-2018 data, there were three observed events within the signal region,...

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  4. 858. KOTO II at J-PARC to measure the branching ratio of $K_L\to \pi^0\nu\overline{\nu}$
    Hajime Nanjo (Osaka University (JP))
    18/07/2024, 09:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The KOTO II is a next-generation experiment to measure the branching ratio of $K_L\to \pi^0\nu\overline{\nu}$ with 30-GeV proton beam at J-PARC. The KOTO II is a successor of the currently running KOTO experiment. We plan to expand the hadron experimental facility at J-PARC, and construct a new beamline of KOTO II there. The extraction angle of the $K_L$ is 5 degrees, which is smaller than...

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  5. 1269. Progress in the Unitarity Triangles (UTs) and in CP violation
    Amarjit Soni (BNL-HET)
    18/07/2024, 09:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Recent progress achieved in the standard B-unitarity triangle and in the Kaon unitarity triangle is discussed. In particular, we outline how further inroads into the Kaon UT can be made via K0=>pi0+l+l- in both theory and in experiments. In the current precision flavor era, where there are large fluxes of Bโ€™s and kaonโ€™s from LHCb, Belle-II, NA62, KOTO and the proposed experiments such as...

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  6. 111. Hyperon physics at BESIII
    Wenjing Zheng (The Institute of High Energy Physics of The Chinese Academy of Sciences)
    18/07/2024, 09:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    With the large datasets of $๐‘’^+๐‘’^โˆ’$ annihilation at the ๐ฝ/๐œ“ and ๐œ“(3686) resonances collected by the BESIII experiment, multi-dimensional analyses making use of polarisation and entanglement can shed new light on the production and decay properties of hyperon-antihyperon pairs. In a series of recent studies performed at BESIII, significant transverse polarisation of the (anti)hyperons has been...

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  7. 708. Testing CPT symmetry with multistrange baryons mass precision measurements with ALICE
    Romain Schotter (Stefan Meyer Institute for Subatomic Physics of the Austrian Academy of Sciences (AT))
    18/07/2024, 10:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    In any relativistic quantum field theory, such as Quantum Chromodynamics or Electroweak theory, the interactions are invariant under the combined operation of Charge conjugation (C), Parity transformation (P) and Time reversal (T). One of the consequences of this (CPT) symmetry is that particles and their corresponding antiparticles must have exactly the same mass. While the mass difference...

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  8. 1243. Run-2/3 measurement of the muon anomalous magnetic moment by the Muon g-2 experiment at Fermilab
    Prof. Kim Siang Khaw (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)
    18/07/2024, 10:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Muon g-2 experiment at Fermilab aims to measure the muon magnetic moment anomaly, aฮผ = (gโˆ’2)/2, with a final accuracy of 0.14 parts per million (ppm). The experimentโ€™s first result, published in 2021 and based on Run-1 data collected in 2018, confirmed the previous result obtained at Brookhaven National Laboratory with a similar sensitivity of 0.46 ppm. In this talk, we will present the...

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  9. 777. Measurement of the anomalous spin precession frequency ฯ‰a in the Muon g โˆ’2 experiment at Fermilab
    Lorenzo Cotrozzi
    18/07/2024, 11:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Muon $g-2$ Experiment at Fermilab aims to measure the muon magnetic moment anomaly, $a_{\mu} = (g-2)/2$, with a final accuracy of 0.14 parts per million (ppm). A $3.1$-GeV muon beam is injected into a storage ring of $14\,$m diameter, in the presence of a $1.45\,$T magnetic field. The anomaly $a_\mu$ can be extracted by accurately measuring the anomalous muon spin precession frequency...

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  10. 756. Combination of highly correlated measurements of the muon precession frequency in magnetic field for the FNAL measurement of the muon magnetic anomaly
    Alberto Lusiani (Scuola Normale Superiore and INFN, sezione di Pisa)
    18/07/2024, 11:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We describe the procedures that were developed to verify the consistency and combine multiple independent analyses of the muon precession measurement by the FNAL-E989 collaboration. These procedures were applied to the first (2021) and second (2023) results published by the collaboration. To properly verify the consistency of different analyses up to 20 ppb, correlations have been modeled and...

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  11. 309. Measurement of the $e^+e^-\to \pi^+\pi^-\pi^0$ cross section in the centre-of-mass range 0.62 to 3.5$~$GeV at Belle$~$II
    Yuki Sue (Nagoya University)
    18/07/2024, 11:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We report a measurement of the $e^+e^-\to\pi^+\pi^-\pi^0$ cross section in the energy range from 0.62$~$GeV to 3.5$~$GeV using an initial-state radiation technique. We use an $e^+e^-$ data sample corresponding to $191~\mathrm{fb}^{-1}$ of integrated luminosity, collected at a centre-of-mass energy at or near the $\Upsilon(4S)$ resonance with the Belle$~$II detector at the SuperKEKB collider....

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  12. 673. LFV muon decays study with neutrino NSI
    Anjan Giri
    18/07/2024, 11:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Lepton flavor violation (LFV) is a suitable avenue to look for physics beyond the SM. The observation of neutrino oscillation has opened a new window, indicating new physics. In our work, we study the charged LFV $\mu$ decays such as $\mu\rightarrow e\gamma$, $\mu \rightarrow eee$, and $(\mu - e)_{\text{Ti}}$ with a vector leptoquark ($U_3$) by considering the constraints from non-standard...

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  13. 877. The latest results of the MEG II experiment
    Dr Wataru Otani (University of Tokyo (JP))
    18/07/2024, 12:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The MEG II experiment searches for the lepton flavour violating decay $\mu^+\to e^+\gamma$ with the world's most intense continuous muon beam at the Paul Scherrer Institute and high-performance detectors, aiming at ten times higher sensitivity than the previous MEG experiment. The result with the first dataset in 2021 was published, and the MEG II experiment took data in 2022 and 2023...

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  14. 1000. A search for muon-to-electron conversion at J-PARC : The COMET experiment
    Hajime Nishiguchi
    18/07/2024, 12:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The COMET Experiment at J-PARC aims to search for the lepton-flavour violating process of muon to electron conversion in a muonic atom, $\mu^{-}N\rightarrow\mathrm{e}^{-}N$, with a 90% confidence level branching-ratio limit of $6\times 10^{-17}$, in order to explore the parameter region predicted by most well-motivated theoretical models beyond the Standard Model. In order to realize the...

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  15. 874. Status of the muEDM experiment at PSI
    Francesco Renga (INFN Roma)
    18/07/2024, 14:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Explaining the matter-antimatter asymmetry in the Universe requires new sources of CP violation beyond the predictions of the Standard Model (SM). Electric dipole moments (EDMs) of particles, being zero if CP is exactly conserved and extremely small in the SM, are a very clean and sensitive probe for new physics. We will present the status of the muEDM experiment, a search for a muon EDM at...

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  16. 419. In search of New Physics with Lepton Flavor Violation in ฮฅ(3S)โ†’eยฑฮผโˆ“
    Nafisa Tasneem (St. Francis Xavier University)
    18/07/2024, 14:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Although unobservable in the standard model, charged lepton flavour violating (LVF) processes are predicted to be enhanced in new physics extensions. We present the final results of a search for electron-muon flavour violation in ๐›ถ(3S) โ†’ eยฑฮผโˆ“ decays using data collected with the BaBar detector at the SLAC PEP-II e+eโˆ’ collider operating with a 10.36 GeV centre-of-mass energy. The search was...

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  17. 307. Searches for lepton-flavour violation in $\tau$ decays at Belle and Belle$~$II
    Wenzhe Li (Beihang University (CN))
    18/07/2024, 15:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle and Belle$~$II experiments have collected a $1.4~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. This sample contains approximately 1.3 billion $e^+e^-\to \tau^+\tau^{-}$ events, which we use to search for lepton-flavour violating decays. We present searches for tau decay to three charged leptons, $\tau^-\to K_{\rm...

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  18. 306. Precision measurements of $\tau$ lepton decays at Belle$~$II
    Gianluca Inguglia (Austrian Academy of Sciences (AT))
    18/07/2024, 15:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle$~$II experiment has collected a $424~\mathrm{fb}^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. This sample contains 389 million $e^+e^-\to \tau^+\tau^{-}$ events, which we use for precision tests of the standard model. We present measurements of leptonic branching fractions, lepton-flavour universality between electrons and...

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  19. 247. Heavy flavor studies at ILC
    Andrej Saibel (Univ. of Valencia and CSIC (ES))
    18/07/2024, 15:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The International Linear Collider (ILC) offers favorable low-background
    environment as well as the high energy reach to measure properties of heavy
    quarks and the top-quark in particular. As these particles are likely messengers of
    new physics, precision measurements of their properties can be interpreted in the
    context of search for beyond-the-Standard-Model (BSM) realizations. The...

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  20. 515. Flavour and tau physics at FCC-ee
    Aidan Richard Wiederhold (University of Warwick (GB))
    18/07/2024, 15:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The unparalleled production of beauty and charm hadrons and tau's in the $6\cdot 10^{12}$ Z boson decays expected at FCC-ee offers outstanding opportunities in flavour physics. A wide range of measurements will be possible in heavy-flavour spectroscopy, rare decays and CP violation, benefitting from a low-background environment, initial-state energy-momentum constraints, high Lorentz boost,...

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  21. 656. Status of Chiral Belle: The Beam Polarization Upgrade of SuperKEKB
    Prof. Michael Roney (Univesity of Victoria)
    18/07/2024, 16:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Recent R&D work associated with upgrading the SuperKEKB $e^+e^โˆ’$ collider with polarized electron beams and Chiral Belleโ€™s program of unique precision measurements using Belle II will be described. These include five values of $\sin^2\theta_W$ via left-right asymmetry measurements ($A_{LR}$) in $e^+e^- \rightarrow e^+e^-, \mu^+\mu^-, \tau^+\tau^-, c\bar{c},b\bar{b}$. $A_{LR}$ yields values of...

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  22. 1007. Flavor Physics at the CEPC
    Manqi Ruan (Chinese Academy of Sciences (CN))
    18/07/2024, 16:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The CEPC is a proposed electron-positron Higgs factory. It is expected to deliver millions of Higgs bosons, Teras of Z boson, Gigas of W boson, and potentially Teras of Z boson. On top of the precise Higgs property measurement, it could also conduct an intriguing flavor physics program that is highly complementary to other flavor physics facilities, as well as to other physics measurements at...

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  23. 1320. Precision measurements of charged pion decays with the PIONEER Experiment
    Toshiyuki Iwamoto
    18/07/2024, 17:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    PIONEER is a next-generation precision experiment proposed at PSI to perform high precision measurements of rare pion decays. By improving the precision on the experimental result of the charged pion branching ratio to electrons vs. muons and the pion beta decay by an order of magnitude, PIONEER will provide a pristine test of Lepton Flavour Universality and the Cabibbo angle anomaly. In...

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  24. 298. Measurements of $V_{cb}$ and $V_{ub}$ at Belle and Belle$~$II
    Michele Aversano (Nagoya University)
    18/07/2024, 17:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle and Belle$~$II experiments have collected a 1.1$~$ab$^{-1}$ sample of $e^+ e^- \to B\bar{B}$ collisions at the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity and constrained initial state kinematics, are an ideal environment to study semileptonic and leptonic decays of the $B$ meson. Combined with theoretical inputs, measurements of both inclusive and exclusive...

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  25. 721. Truncation orders, external constraints, and the determination of $|V_{cb}|$
    Mr Eric Persson (University of Bonn)
    18/07/2024, 17:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We investigate the role of different schemes in deciding at what order to truncate form factor expansions for semileptonic decays and how to determine the appropriate combination of truncations when multiple form factors are involved. The specific choice of truncation orders can significantly impact the reported values of exclusive $|V_{cb}|$. Additionally, we explore whether and how unitarity...

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  26. 618. The role of $\rho-\omega$ interference in semileptonic $B \to \pi^+ \pi^- \ell \bar \nu_\ell$ decays
    Florian Urs Bernlochner (University of Bonn (DE))
    18/07/2024, 17:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    It is long known that interference effects play an important role in understanding the shape of the $\pi^+\pi^-$ spectrum of resonances near the threshold. In this manuscript, we investigate the role of the $\rho-\omega$ interference in the study of semileptonic $B \to \pi^+ \pi^- \ell \bar \nu_\ell$ decays. We determine for the first time the strong phase difference between $B \to \rho \ell...

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  27. 1186. Analyzing semileptonic $b \rightarrow u$ transitions with vector and scalar leptoquarks
    Tarun Kumar (University of Hyderabad)
    18/07/2024, 18:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Observed anomalies in the flavor sector as displayed by the LFU ratios $R_{D^{(*)}}$ in the tree level $b\rightarrow c \tau\nu_\tau$ transitions motivate the search for new physics beyond the standard model. The semileptonic tree level $b\rightarrow u$ sector may hide similar unexplored new physics. Considering a model-dependent approach, we explore the decay channel $B_c\rightarrow D...

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  28. 358. LHCb measurements on semileptonic decays of b-hadrons
    Anna Lupato (Universitร  di Bergamo & INFN Padova)
    19/07/2024, 08:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Semileptonic $b$-hadron decays proceed via charged-current interactions and provide powerful probes for testing the Standard Model and for searching for New Physics effects. The advantages of studying such decays include the large branching fractions and reliable calculations of the hadron matrix elements. In this contribution, LHCb measurements on CKM paramenters and test of new physics will...

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  29. 823. Precision calculations in B physics
    Matthias Steinhauser
    19/07/2024, 08:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We review recent higher order calculations to properties of $B$ mesons. This includes next-to-next-to-leading order corrections to hadronic and next-to-next-to-next-to-leading order corrections to semi-leptonic $B$ meson decays. The latter is important in connection to the determination of the CKM matrix element $V_{cb}$. We also discuss next-to-next-to-leading order corrections to the width...

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  30. 1044. Pushing the Heavy Quark Expansion for $b\to c\ell\bar{\nu}$ to higher order in $1/m_b$
    Ilija Sibin Milutin
    19/07/2024, 09:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Heavy Quark Expansion (HQE) has become the major tool to perform precision calculations for inclusive heavy hadron decays. With this method, $V_{cb}$ has been extracted with percent-level precision from moments of $B\to X_c\ell\bar{\nu}$. The HQE is an expansion in $1/m_b$ and introduces nonperturbative HQE matrix elements which can be extracted from data.

    To further increase the...

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  31. 684. Model-independent extraction of form-factors and $|V_{cb}|$ in $\overline{B}\to D^{(*)} \ell^- \overline{\nu}_\ell$ with hadronic tagging at $BABAR$
    Gerald Eigen (University of Bergen (NO))
    19/07/2024, 09:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Employing the full $BABAR$ dataset with hadronic tagging, we present a model-independent form factor analysis for $B\to D^{(*)}\ell\nu$ and a moments analysis for $B\to D^{*}\ell\nu$ . We also perform a combined lattice+$BABAR$ joint $B\to D^{(*)}\ell\nu$ form factor analysis employing an HQET parameterization. We report updated $|V_{cb}|$ and SM theory predictions for R(D(*)) from this analysis

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  32. 620. Kolya and New results on inclusive $|V_{cb}|$ using $E_\ell$, $M_X$, and $q^2$ spectral moments
    Matteo Fael (CERN)
    19/07/2024, 09:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We present a new global fit for inclusive $|V_{cb}|$ based on the Kolya open-source library, utilizing the full available set of spectral moments of semileptonic $B \to X_c \ell \bar \nu_\ell$ decays with state-of-the-art precision. Our approach includes a novel prescription to estimate the uncertainty arising from missing higher-order contributions of order $1/m^4$ in the heavy quark...

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  33. 1100. ฮ›b โ†’ ฮ›_c^* at O(1/m_c^2) in heavy quark expansion
    Davide Iacobacci
    19/07/2024, 09:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We systematically compute the ฮ›b(p,sb)โ†’ฮ›c(2595)+ and ฮ›b(p,sb)โ†’ฮ›c(2625)+ form factors within the heavy quark effective theory (HQET) framework including O(1/m^c_2) contributions. Besides taking into account the Standard Modelโ€“like vector and axial contributions, we further determine tensor and pseudotensor form factors. Our work constitutes a step forward with respect to previous analyses...

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  34. 37. The Mu2e Experiment
    Sophie Middleton (Caltech)
    19/07/2024, 10:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Mu2e experiment at Fermilab will search for the coherent, neutrino-less conversion of a negative muon into an electron in the field of an aluminum nucleus, an example of Charged Lepton Flavor Violation (CLFV). Observation of CLFV at Mu2e would be an unambiguous signal of physics beyond the Standard Model (BSM). Mu2e aims to improve previous sensitivity on the conversion rate by four orders...

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  35. 938. Calibration of the Mu2e momentum scale using $\pi^{+}\rightarrow e^{+},\nu_{e}$ decays
    Dr Sridhar Tripathy (University of California, Davis)
    19/07/2024, 10:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Mu2e experiment at Fermilab will search for the neutrinoless muon-to-electron conversion in the nuclear field by stopping $\mu^{-}$ on an Al target. The experimental signature of $\mu^{-}$ to $e^{-}$ conversion on Al is the 104.97 MeV mono-energetic conversion $e^{-}$s. Rejection of one of the most important experimental backgrounds coming from muon Decays-In-Orbit requires a momentum...

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  36. 299. Measurements of lepton-flavour universality in semileptonic $B$ decays at Belle and Belle$~$II
    Markus Tobias Prim (University of Bonn (DE))
    19/07/2024, 11:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle and Belle II experiments have collected a 1.1$~$ab$^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity, constrained initial state kinematics and excellent lepton identification, are ideal to study lepton-flavour universality in semileptonic decays of the $B$ meson.
    We present results on the ratios of...

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  37. 107. An Updated Estimation of CP violating Electric Dipole Moments from known mechanisms in the Standard Model
    Prajwal MohanMurthy
    19/07/2024, 11:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    New sources of CP violation, beyond the CKM matrix in the Standard Model (SM), which encodes the weak sector, are required to explain the baryon asymmetry of the universe. An additional mechanism within the SM that can generate CP violating electric dipole moments (EDMs), is through the QCD $\theta_s$ parameter, via the strong sector. Significant advances in the recent past coming from new...

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  38. 357. Lepton Flavour Universality tests using semileptonic b-hadron decays
    Dr Phoebe Hamilton (University of Maryland (US))
    19/07/2024, 11:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    In the SM, the electroweak bosons couple to the three lepton families with the same strength, the only difference in their behaviour being due to the difference in mass. In recent years, some deviations have been found in measurements of the ratios of branching fractions for $b$-hadrons decaying into final states with different lepton flavours. This talk presents recent results of lepton...

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  39. 720. Taming second order power corrections and updated predictions for $R(D/D^*)$ and $R(\Lambda_c)$ within and beyond the Standard Model
    Markus Tobias Prim (University of Bonn (DE))
    19/07/2024, 11:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    In arxiv:2312.07758 and arxiv:2206.11281 we applied the recently-developed Residual Chiral Expansion (RCE) to significantly reduce the set of unknown subsubleading hadronic functions to a set of highly-constrained functions at second order in Heavy Quark Effective Theory (HQET). In this talk, we present updated predictions for $R(D/D*)$ using the RCE and the recent new experimental inputs...

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  40. 678. An Imperative study of the angular observables in $\Lambda_b^0 \to \Lambda_c^{+}(\to \Lambda \pi^{+})\tau \bar{\nu_{\tau}}$ decay in SM and in new physics
    Ria sain
    19/07/2024, 12:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We do the complete 4-body angular distribution for the decay of $\Lambda_b^0 \to \Lambda_c^{+}(\to \Lambda \pi^{+})\tau \bar{\nu_{\tau}}$.We provide form factor for BGL parametrization and update the SM prediction for angular observables with the LFUV ratio $R(\Lambda_{c})$ which we find consistent with the Lattice.For the first time,the CP violating(CPV) observable are analyzed. Using the...

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  41. 141. Lepton flavour violation studies at CMS
    Chiara Ilaria Rovelli (Sapienza Universita e INFN, Roma I (IT))
    19/07/2024, 12:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Results are presented on LF(U)V tests through precise measurements of decays involving heavy mesons and leptons, which are compared to the standard model predictions. The measurements use 13 TeV pp collision data collected by the CMS experiment at the LHC.

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  42. 488. Search for Charged Lepton Flavor Violation at future lepton colliders with Z' model
    Jingshu Li (Sun Yat-Sen University (CN))
    19/07/2024, 14:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Charged lepton flavor violation (CLFV), poses a compelling indicator of potential physics beyond the standard model by violating the conservation of lepton flavor. A model is utilized featuring an additional Z$^{\prime}$ gauge boson to conduct an extensive comparative analysis of CLFV investigations at future lepton collider facilities, including a 240 GeV electron-positron collider and a muon...

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  43. 1281. Short- vs long-distance dynamics in b->sll decays
    Arianna Tinari
    19/07/2024, 14:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The tension of $B\to K^{(*)}\bar\ell\ell$ decays with the Standard Model (SM) can be attributed to a short-distance (SD) $b s\bar\ell\ell$ interaction.
    We show two methods to disentangle this effect from long-distance (LD) dynamics. Firstly, we do a comparison of the inclusive $b\to s\bar\ell\ell$ rate at high $q^2=m^2_{\ell\ell}\geq 15~\rm GeV^2$ with a determination based on data on the...

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  44. 356. Analysis of local and non-local amplitudes in the $B^0 \to K^{*0}\mu^+\mu^-$ decay
    Martin Andersson (University of Zurich (CH))
    19/07/2024, 15:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The $B^0 \to K^{*0}\mu^+\mu^-$ decay is mediated via the rare flavour changing neutral current transition $b \to s\ell^+\ell^-$, and constitute sensitive probes for New Physics (NP), as they are forbidden at tree-level in the SM. Virtual NP contributions can therefore have a large impact, and previous LHCb measurements of the decay have shown interesting tensions with the SM predictions at the...

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  45. 438. Tests of Lepton Flavour Universality at LHCb
    Rafael Silva Coutinho (Syracuse University (US))
    19/07/2024, 15:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Rare B-hadron decays mediated by $b\to s\ell^+\ell^-$ transitions provide a sensitive test of Lepton Flavour Universality (LFU), a symmetry of the Standard Model by which the coupling of the electroweak gauge bosons to leptons is flavour universal. Extensions of the SM do not necessarily preserve this symmetry and may give sizable contributions to these processes. Precise measurements of LFU...

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  46. 174. cLFV searches in B decays at LHCb
    Tommaso Fulghesu (Centre National de la Recherche Scientifique (FR))
    19/07/2024, 15:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Charged Lepton flavour violation (cLFV) is a flavour-changing short-range interaction among charged leptons. cLFV processes, although allowed by neutrino oscillations, are in the Standard Model highly suppressed, hence below any experiment sensitivity. Thus, a search for cLFV constitutes a clear probe of Beyond the Standard Model (BSM) physics. The LHCb collaboration has recently conducted...

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  47. 143. Rare and forbidden decays at CMS
    Stefanos Leontsinis (University of Zurich (CH))
    19/07/2024, 15:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Recent CMS results on rare decays with FCNC transition. The analyses are based on proton-proton collision data collected in pp collisions at sqrt(s)=13 TeV.

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  48. 439. Search for Very Rare Decays at LHCb
    Giulia Frau (University of Manchester (GB))
    19/07/2024, 16:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    At the LHCb Experiment, we search for very rare decays of heavy hadrons containing b or c quarks. Most of these decays occur in the Standard Model (SM) through heavily-suppressed Flavour-Changing Neutral Currents (FCNC) leading to decay rates expected to be as tiny as 10^-9 or considerably below. These decays offer therefore various possibilities to search for deviations from SM predictions....

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  49. 300. Measurements of electroweak penguin and lepton-flavour violating $B$ decays to final states with missing energy at Belle and Belle$~$II
    Meihong Liu (Fudan University)
    19/07/2024, 16:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle and Belle II experiments have collected a 1.1$~$ab$^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at the $\Upsilon(4S)$ resonance. These data, with low particle multiplicity and constrained initial state kinematics, are an ideal environment to search for rare $B$ decays proceeding via electroweak penguin processes and lepton-flavour violating decays to final states with missing...

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  50. 134. Understanding the first observation of Bโ†’Kฮฝฮฝ by Belle-II
    Dr Olcyr Sumensari (IJCLab)
    19/07/2024, 17:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle-II experiment has recently measured $\mathcal{B}(B\to K\nu\nu)$, which appears to be almost $3\sigma$ larger than its Standard Model (SM) prediction. In this talk, I will critically revisit the status of the SM predictions for the $B\to K^{(\ast)}\nu\nu$ decays, and discuss the interpretation of this Belle-II measurement in terms of a general Effective Field Theory, as well as...

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  51. 301. Measurements of radiative and electroweak penguin $B$ decays without missing energy at Belle and Belle$~$II
    Martin Angelsmark
    19/07/2024, 17:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle and Belle$~$II experiments have collected a 1.1$~$ab$^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at the $\Upsilon(4S)$ resonance. We present results on the radiative decays $B^0\to \gamma\gamma$, $B\to \rho\gamma$ and $B\to K^{*}\gamma$. $C\!P$ and isospin asymmetries are presented for the latter two decays. We also present results from decays involving $b\to s\ell^+\ell^-$...

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  52. 172. Radiative b-hadron decays at LHCb
    Aniol Lobo Salvia (University of Barcelona (ES))
    19/07/2024, 17:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Radiative rare b-hadron decays are sensitive probes of new Physics through the study of branching fractions, angular observables, CP violation paramenters and photon polarization. The LHCb experiment is ideally suited for the analysis of these decays due to its high trigger efficiency, as well as excellent tracking and particle identification performance. Recent measurements of the b-hadron...

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  53. 437. Weak decays of beauty baryons at LHCb
    Ulrik Egede (Monash University (AU))
    19/07/2024, 17:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Weak decays of beauty baryons offer an attractive laboratory to search for effects beyond the Standard Model (SM), complementary to searches in meson decays. Flavour changing neutral currents such as $b \to s\ell^+\ell^-$ transitions are of particular interest due to their high suppression in the SM. The LHCb experiment is ideally suited for the analysis of these decays due to its high trigger...

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  54. 226. Flavourful global fit to LHCb data with the general two Higgs doublet model: An update
    Dr Cristian Felipe Sierra Fonseca (Nanjing Normal University)
    19/07/2024, 18:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We present an update of the likelihood analysis of the general two Higgs doublet model, using both theoretical constraints and the latest experimental measurements of the flavour observables. We make use of the public code GAMBIT and find that the model can explain the neutral anomalies while respecting the latest measurement of RK((*)) by the LHCb and simultaneously fitting the values of the...

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  55. 173. Beauty baryon decays at LHCb
    Yanxi Wu (Peking University (CN))
    19/07/2024, 18:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The beauty baryon spectroscopy exhibit a rich phenomenology, which contributes to a deep comprehension of fundamental interactions. The large sample of beauty baryons produced at the Large Hadron Collider offers an unprecedented opportunity to enhance our understanding of these particles through searching for new decay channels, measurement of b-baryon properties, and the exploration of new...

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  56. 140. CMS results on flavour spectroscopy
    Alexis Pompili (Universita e INFN, Bari (IT))
    20/07/2024, 08:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The latest CMS results on spectroscopy and properties of beauty mesons and baryons are presented. The results are obtained with the data collected by the CMS experiment in proton-proton collisions at sqrt(s)=13 TeV.

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  57. 310. Studies of hadron spectroscopy at Belle and Belle II
    Roman Mizuk (IJCLab, Orsay)
    20/07/2024, 08:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle and Belle$~$II experiments have collected a $1.4~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These data include a 19.2$~$fb$^{-1}$ sample collected near the $\Upsilon(10753)$ resonance. We present several results related to the following processes: $e^+e-\to \Upsilon(nS)\eta$, $e^+e-\to \gamma...

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  58. 429. Spectroscopy studies with B-> DDX decays at LHCb
    Raul Rabadan (University of Warwick (GB))
    20/07/2024, 09:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The latest studies of beauty meson decays to open charm final states from LHCb are presented. Several first observations and branching fraction measurements using Run 1 and Run 2 data samples are shown. These decay modes will provide important spectroscopy information and inputs to other analyses.

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  59. 399. Charmed hadron properties and spectroscopy at LHCb
    Miroslav Saur (Peking University (CN))
    20/07/2024, 09:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The LHCb experiment collected the world's largest sample of charmed hadrons during the Run 1 and 2 of the LHC (2011--2018). This allows performing some of the world's most precise measurements of production, quantum numbers and decay properties of known charmed baryons, as well as searching for new excited states. The latest results in this field are presented, including some new amplitude analyses.

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  60. 112. Light Meson decays at BESIII
    Benhou Xiang (Institute of High Energy Physics๏ผŒ Chinese Academy of Sciences)
    20/07/2024, 09:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The worldโ€™s largest sample of $J/ฯˆ$ events accumulated at the BESIII detector offers a unique opportunity to investigate $ฮท$ and $ฮท^โ€ฒ$ physics via two body $J/ฯˆ$ radiative or hadronic decays. In recent years the BESIII experiment has made significant progresses in $ฮท/ฮท^โ€ฒ$ decays. A selection of recent highlights in light meson spectroscopy at BESIII are reviewed in this report, including...

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  61. 126. Measurements of charmonium decays at BESIII
    Jipeng Wang (Shandong University)
    20/07/2024, 09:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    This presentation will feature several recent results of charmonium decays, including four first-time observations: $\psi(3686) \to \Omega^- K^+ anti-\Xi^0$, $\eta_c(2S) \to K^+ K^- \eta$, $\eta_c(2S) \to \pi^+ \pi^- K_s K^{+/-} \pi^{-/+}$, and $\chi_{cJ} \to 3(K^+K^-)$. Additionally, an updated measurement of the M1 transition $\psi(3686) \to \gamma \eta_c(2S)$ with $\eta_c(2S) \to K\bar{K}...

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  62. 304. Mixing and $C\!P$-violation measurements with $D$ mesons at Belle and Belle$~$II
    Michel Bertemes (Austrian Academy of Sciences (AT))
    20/07/2024, 10:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle and Belle$~$II experiments have collected a $1.4~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These samples contain a large number of $e^+e^-\to c\bar{c}$ events that produce charmed mesons. We present measurements of charm-mixing parameters from flavour-tagged $D^0\to K^0_{\rm S}\pi^+\pi^-$ decays. Direct $C\!P$...

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  63. 400. Mixing and time-dependent CP violation in charm decays at LHCb
    Roberto Ribatti (EPFL)
    20/07/2024, 10:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    LHCb has collected the world's largest sample of charmed hadrons. This sample is used to measure the $D^0 -\overline{D}^0$ mixing and to search for $C\!P$ violation in the mixing. New measurements of several decay modes are presented, along with prospects for the sensitivity at the LHCb upgrades.

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  64. 401. CP violation in the decay of charmed hadrons at LHCb
    Maurizio Martinelli (Universita & INFN, Milano-Bicocca (IT))
    20/07/2024, 11:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The LHCb experiment published the first observation of CP violation in the decay of charmed particles in 2019, using the decay channels $D^0 \to \pi^+\pi^-$ and $D^0 \to K^+K^-$. Additional measurements in other decay channels are essential to understand whether this effect can be explained within the Standard Model, or if new sources of CP violation are needed. We present the latest searches...

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  65. 701. Combined analysis of D-Dbar mixing data. Update from the UTfit collaboration.
    Mr Roberto Di Palma (Universitร  Roma Tre, Infn, sezione di Roma Tre)
    20/07/2024, 11:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We update our analysis of D meson mixing including the latest experimental results. We derive constraints on absorptive and dispersive CP violation by combining all available data, and discuss future projections. We also provide posterior distributions for observable parameters appearing in D physics.

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  66. 181. D-Dbar mixings from nonlocal condensate contributions
    Blaลพenka Meliฤ‡ (Rudjer Boskovic Institute)
    20/07/2024, 11:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We revisit the problem of nonperturbative contribution to the mass difference in D0โˆ’D0bar mixing within the Standard Model.
    As it is known the GIM cancellation in the leading OPE is very effective, and the SM calculation gives the result which is orders of magnitude smaller than the experimental value for this quantity. Therefore, it is necessary to go beyond the leading terms to catch...

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  67. 305. Rare and baryonic decays of charmed hadrons at Belle and Belle$~$II
    Young Jun Kim (Korea University)
    20/07/2024, 11:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle and Belle$~$II experiments have collected a $1.4~\mathrm{ab}^{-1}$ sample of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These samples contain a large number of $e^+e^-\to c\bar{c}$ events that produce charmed mesons and baryons. We present searches for rare flavour-changing neutral current $c\to u\ell^+\ell^-$ processes in several decay...

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  68. 341. Looking for New Physics through exclusive $c\to s e\nu$ decay modes
    Dr Damir BECIREVIC (IJCLab, CNRS and Universitรฉ Paris-Saclay)
    20/07/2024, 12:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    It is well known that the decay rates of leptonic decays of mesons, as well as the rates and angular observables of semileptonic decays of mesons and baryons, can provide a window to physics beyond the Standard Model. We point out the difficulties and prospects of such an endeavor in the case of $c\to s e\nu$ for which both the experimental and theoretical uncertainties are under control....

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  69. 398. Rare charm decays at LHCb
    Francesco Dettori (Universita e INFN, Cagliari (IT))
    20/07/2024, 12:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    LHCb is playing a crucial role in the study of rare and forbidden semileptonic decays of charm hadrons, which might reveal interactions beyond the Standard Model. We present the latest measurements of charm decays with two leptons in the final state.

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  70. 120. Charmed baryon decays at BESIII
    Dr Cong Geng (Sun Yat-sen University)
    20/07/2024, 14:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    BESIII has accumulated 4.5 $fb^{-1}$ of $e^+e^-$ collision data at the 4.6 and 4.7 GeV energies, presenting a unique opportunity to investigate $\Lambda_c^+$ decays. Our presentation will include the first measurement of the decay asymmetry in the pure W-boson-exchange decay $ฮ›_c^+โ†’ฮž^0 K^+$, as well as the study of $\Lambda_c^+ \to \Lambda l^+ \nu$ and the branching fraction measurements of...

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  71. 118. Charmed meson decays at BESIII
    Dr Bo Zheng (University of South China)
    20/07/2024, 14:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    BESIII has collected 2.93 and 7.33 $fb^{-1}$ of $e^+e^-$ collision data at 3.773 and 4.128-4.226 GeV, recording the largest dataset of $D\bar{D}$ and $D_sD_s$ pairs in the world, respectively.
    We will present the observation of $D^+ \to K_s a^0(980)$ and a new $a^0$-like state with a mass of 1.817 GeV, and the determination of U-spin breaking parameters of the decay $D^0 \to K_L \pi^+...

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  72. 1433. Lattice QCD and flavor physics
    Oliver Witzel (Universitรคt Siegen)
    20/07/2024, 15:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The rich structure of flavor physics provides a plethora of possibilities to test or constrain the standard model. This requires both precise experimental measurements as well as theoretical predictions. Determining nonperturbative contributions due to the strong force is the prime task of lattice QCD calculations leading e.g. to determinations of decay constants, form factors or bag...

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  73. 1172. Precise decay rates for $\eta_c\to\gamma\gamma$ and $\eta_b\to\gamma\gamma$ from lattice QCD
    Brian Colquhoun (University of Glasgow)
    20/07/2024, 15:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The measurement of the decay rates $\eta_c\to\gamma\gamma$ and $\eta_b\to\gamma\gamma$ are part of the BES3 and Belle II programmes respectively as tests of the Standard Model. Here we provide, for the first time, precise SM values for these decay rates using lattice QCD. For $\Gamma(\eta_c\to\gamma\gamma)$ we obtain 6.788(61) keV in good agreement with, but much more accurate than,...

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  74. 303. Measurements of hadronic $B$ decay rates at Belle and Belle$~$II
    VISMAYA V S (Indian Institute of Technology(IIT) Hyderabad)
    20/07/2024, 15:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    he Belle and Belle$~$II experiments have collected a 1.1$~$ab$^{-1}$ sample of $e^+ e^-\to B\bar{B}$ collisions at the $\Upsilon(4S)$. The study of hadronic $B$ decays in these data allow the precise measurement of absolute branching fractions and angular distributions of the decay products. These measurements provide tests of QCD and enable the generation of more realistic simulation samples....

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  75. 360. Measurements of charmless three-body decays
    Renaud Amalric (LPNHE (Paris,FR), Centre National de la Recherche Scientifique (FR))
    20/07/2024, 15:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We present an update of the analysis of $B^0_d$ and $B^0_s$ mesons to charmless three-body final states that include a $K^0_S$ meson. The primary goal of the analysis is to search for the as-yet unobserved decay mode $B^0_s \to K^0_S K^+K^-$ In addition, the branching-fraction measurements for the set of decay modes $B^0_{(d,s)} \to K^0_S h^+ h^{'-}$ (where $h$ and $h^{'}$ are each a pion or...

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  76. 397. Beauty to charmonium decays at LHCb
    Dr Luis Miguel Garcia Martin (EPFL - Ecole Polytechnique Federale Lausanne (CH))
    20/07/2024, 16:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The presence of charmonium in the final states of $B$ decays is a very clean experimental signature that allow the efficient collection of large samples of these decays. Such a clean experimental signature makes these decays also suitable for precision measurements of beauty hadrons lifetime and width differences $\Delta\Gamma_{q}$ ($q=d,s$). In this work we present the most recent results of...

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  77. 142. CPV and lifetime measurements from CMS
    Enrico Lusiani (Universita e INFN, Padova (IT))
    20/07/2024, 16:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Uncover recent breakthroughs in Charge-Parity Violation (CPV) and lifetime measurements as presented by the CMS experiment. The measurements use 13 TeV pp collision data collected by the CMS experiment at the LHC.

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  78. 514. ATLAS results on b hadron weak decays
    Alex Cerri (University of Sussex (GB))
    20/07/2024, 17:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    ATLAS results on weak decays on b hadrons are presented, including studies of $B^0_{(s)}\to\mu^+\mu^-$ rare decay, precision CP violation measurements with $B^0_s\to J/\psi\phi$ decay, as well as $B^0$ meson lifetime measurement.

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  79. 137. Optimized Observables in non-leptonic decays
    Gilberto Tetlalmatzi-Xolocotzi (Siegen University)
    20/07/2024, 17:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    We propose a set of new optimized observables using penguin mediated decays together with their CP conjugate partners that are substantially cleaner than the corresponding branching ratios, which are plagued by large end point divergences. We find that the dominant contribution to the uncertainties of these observables stem from the corresponding form factors. The Standard model estimate of...

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  80. 431. Time dependent CP violation measurements at LHCb
    Aidan Richard Wiederhold (University of Warwick (GB))
    20/07/2024, 17:30
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The latest time-dependent CP violation measurements using beauty to open charm decays from LHCb are presented. These decays provide sensitivity to important CKM parameters such as the angles beta and gamma from the unitarity triangle.

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  81. 302. Measurements of $C\!P$ violation in $B$ decays at Belle$~$II
    Dr Yu Nakazawa (KEK IPNS)
    20/07/2024, 17:45
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    The Belle$~$II experiment has collected a 362 fb$^{-1}$ sample of $e^+e^-\to B\bar{B}$ decays at the $\Upsilon(4S)$ resonance. The asymmetric-energy SuperKEKB collider provides a boost to the $B$ mesons in the laboratory frame, enabling measurements of time-dependent $C\!P$ violation. We present measurements of both time-dependent and direct $C\!P$ violation in hadronic $B$ decays. Among the...

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  82. 361. Measurements of B mesons mixing phases at LHCb
    Mary Richardson-Slipper (The University of Edinburgh (GB))
    20/07/2024, 18:00
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Measuring the mixing phases of the B0 and Bs mesons is very important to validate the CP violation paradigm of the Standard Model and to search for new physics beyond it. Golden modes to measure these quantities are those governed by tree-level $b\to c\bar{c}q$ transitions, that allow precise and theoretically clean determinations to be performed. Besides, measuring the mixing phases with...

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  83. 698. Global fits of the Unitarity Triangle within the Standard Model. Updates from the UTfit collaboration.
    Marcella Bona (Queen Mary University of London (UK))
    20/07/2024, 18:15
    05. Quark and Lepton Flavour Physics
    Parallel session talk

    Flavour physics represents a unique test bench for the Standard Model (SM). New analyses performed at the LHC experiments and new results coming from Belle II are bringing unprecedented insights into CKM metrology and new results for rare decays. The CKM picture provides very precise SM predictions through global analyses. We present here the results of the latest global SM analysis performed...

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