CKM 2025 - 13th International Workshop on the CKM Unitarity Triangle

15 Sept 2025, 02:00 → 19 Sept 2025, 14:45 Europe/Zurich

Sala Castello (Hotel Regina Margherita)

Francesca Dordei (INFN, Cagliari (IT)), Francesco Dettori (Universita e INFN, Cagliari (IT))

CKM 2025 is the 13th International Workshop on the CKM Unitarity Triangle, to be held September 15 to 19, 2025 in Cagliari, Sardinia, Italy.

The CKM series is a well-established international meeting in the field of quark-flavour physics that brings together experimentalists and theorists to a common platform. The program covers neutron, kaon, charm and beauty hadron, top quark physics and lepton flavour violating Higgs.

Registration is now open: https://ckm2025.ca.infn.it/registration/.

 

Second_Bulletin_CKM.pdf

Monday 15 September

Registration

Welcome

Conveners: Francesca Dordei (INFN, Cagliari (IT)), Francesco Dettori (Universita e INFN, Cagliari (IT))

1 Welcome and introduction

Speakers: Francesca Dordei (INFN, Cagliari (IT)), Francesco Dettori (Universita e INFN, Cagliari (IT))

2 Welcome from INFN Cagliari and University of Cagliari

Speakers: Alessandro Cardini (INFN Cagliari, Italy), Biagio Saitta (Universita e INFN, Cagliari (IT)), Prof. Michele Saba (UniCa Physics Department)

Plenary Session

3 Review on phenomenology

Speaker: Marzia Bordone (University of Zürich and CERN)

4 Review of e+e- colliders

Speaker: Soeren Andre Prell (Iowa State University (US))

5 Review of hadron colliders

Speaker: Fred Blanc (EPFL - Ecole Polytechnique Federale Lausanne (CH))

Coffee break

WG3

Conveners: Eluned Anne Smith (Massachusetts Inst. of Technology (US)), Méril REBOUD (CNRS - IJClab), Radoslav Marchevski (École Polytechnique Fédérale de Lausanne (EPFL)), Slavomira Stefkova

6 Weak radiative $B$ decays to NNLO with full charm mass dependence (20'+4')

We present next-to-next-to-leading order predictions for the decay $\bar{B}\to X_s \gamma$. Special emphasis is put on the recently completed ${\cal O}(\alpha_s^2)$ corrections to the interference of the photonic dipole operator $Q_7$ and the current-current operators $Q_1$ and $Q_2$.
We provide updated results for the branching ratio with reduced uncertainties.

Speakers: Matthias Steinhauser, Matthias Steinhauser (KIT)

7 B -> X_s gamma and other radiative decays in Belle II (20'+4')

Speaker: Ana Luisa Carvalho (DESY)

8 Rare radiative B hadron decays in LHCb (20'+4')

Speaker: Lais Lavra

WG5

Conveners: Jordy Butter (University of Cambridge (GB)), Maria Laura Piscopo, Xiaodong Shi (KEK)

9 Overview of γ determinations and implications for new physics (20'+4')

Speaker: Alexander Lenz

10 Time-integrated measurements of γ at LHCb (20'+4')

Speaker: Shunan Zhang (University of Oxford (GB))

11 Direct CPV in B decay at Belle II (20'+4')

Speakers: Thibaud Humair (DESY), Thibaud Humair (Deutsches Elektronen-Synchrotron (DE))

Lunch

WG6

Conveners: Didar Dobur (Ghent University (BE)), Manuel Szewc, Dr Maria Moreno Llacer (Univ. of Valencia and CSIC (ES))

12 Theoretical overview of Higgs decays to fermions (20'+8')

Speaker: Michele Tammaro (INFN)

13 Di-Higgs production and Higgs self coupling measurements at LHC (22'+8')

Speaker: Mohamed Belfkir (United Arab Emirates University (AE))

14 Measurements of Higgs yukawa couplings at LHC (22'+8')

Speaker: Matteo Marchegiani (ETHZ - ETH Zurich)

15 Measurement of rare top processes and their interpretations (22'+8')

Speaker: Matteo Negrini (Universita e INFN, Bologna (IT))

WG7

Conveners: Keri Vos (Nikhef National institute for subatomic physics (NL)), Michel Bertemes (Austrian Academy of Sciences (AT)), Tommaso Pajero (CERN)

16 CP violation in charm decays (theory) (20'+4')

Speaker: Maria Laura Piscopo

17 CP violation in charm decays at Belle (II) (20'+4')

Speakers: Sanjeeda Bharati Das, Sanjeeda Bharati Das, Sanjeeda Bharati Das (MNIT Jaipur)

18 Final state interactions in charm decays (20'+4')

Speaker: Eleftheria Solomonidi

19 CP violation in charm decays at LHCb (20'+4')

Speaker: Luca Balzani (Technische Universitaet Dortmund (DE))

20 Testing $SU(3)_F$ symmetry in hadronic $D$ decays (20'+4')

Speaker: Carolina Da Silva Bolognani (Nikhef National institute for subatomic physics (NL))

Coffee break

Plenary Session

21 Review on Charm physics results

Speaker: Giulia Tuci (Heidelberg University (DE))

22 Review on the Lattice

Speaker: Tobias Tsang (CERN)

23 Review on Kaon physics results

Speaker: Dr Joel Swallow (INFN - Laboratori Nazionali di Frascati)

24 Beta decay and Lepton universality

Speaker: Dinko Pocanic (University of Virginia (US))

25 Progress in high pT (top, Higgs, flavour at high pT)

Speaker: Syuhei Iguro (Nagoya University)

Welcome drink

Tuesday 16 September

WG2

Conveners: Abhijit Mathad (CERN), Judd Harrison, Markus Tobias Prim (University of Bonn (DE)), Martin Jung (Università di Torino & INFN)

26 |V_ub| measurements: Exclusive and inclusive semileptonic decays at Belle II (20'+4')

Speaker: Marcel Hohmann (CERN)

27 |V_cb| measurements at Belle II (20'+4')

Speaker: Philipp Horak (University of Victoria)

28 Determination of CKM matrix elements in FCCC decays at LHCb (20'+4')

Speaker: Fabian Christoph Glaser (Heidelberg University (DE), Université Paris-Saclay (FR))

29 Prospects of CKM matrix elements at FCC-ee (20'+4')

Speaker: Stephane Monteil (Université Clermont Auvergne (FR))

30 Prospects of CKM matrix elements at near-future detectors (LHCb UII and Belle-II) (20'+4')

Speaker: Marcello Rotondo (INFN e Laboratori Nazionali di Frascati (IT))

WG3

Conveners: Eluned Anne Smith (Massachusetts Inst. of Technology (US)), Méril REBOUD (CNRS - IJClab), Radoslav Marchevski (École Polytechnique Fédérale de Lausanne (EPFL)), Slavomira Stefkova

31 Experimental status of K+ -> pi+ nu nu decay (15'+5')

Speakers: Mauro Piccini, Mauro Piccini (INFN - Sezione di Perugia (IT))

32 Experimental status of K0 -> pi0 nu nu (15'+5')

Speaker: Chieh Lin (National Changhua University of Education)

33 Rare strange decays at LHCb (15'+5')

Speaker: Miguel Fernandez Gomez (Universidade de Santiago de Compostela (ES))

34 Theory overview of rare kaon decays (15'+5')

Speakers: Avital Dery, Avital Dery, Avital Dery, Avital Dery (Weizmann Institute of Science (IL))

35 Experimental overview of rare charm decays (15'+5')

Speaker: Qiang Lan

36 Effective Field Theory analysis of rare charm decays (15'+5')

Speaker: Mr Luiz Vale Silva

Coffee break

WG4

Conveners: Chunhui Chen (Iowa State University (US)), Eleftheria Malami (University of Siegen), Peilian Li (University of Chinese Academy of Sciences)

37 Measurements of sin(2φ2eff) and constraint on sin(2φ2) at Belle and Belle II (20'+4')

Speaker: Ryogo Okubo (Nagoya University)

38 Measuring time-dependent CP violation without signal vertexing at B factories (20'+4')

Speaker: Mirco Dorigo (INFN Trieste)

39 Latest measurement of $\phi_s$ from CMS and ATLAS (20'+4')

Speaker: Franco Simonetto (Universita e INFN, Padova (IT))

40 Towards high-precision measurements on mixing phases φd, φs, properly including penguin contributions (20'+4')

Speaker: Kristof De Bruyn

41 Measuring the angle αds of the flattest Unitary Triangle with B ̄d → φK ̄(∗)0, B ̄s → φK(∗)0 decays (20'+4')

Speaker: Dr Roy Aleksan

WG7

Conveners: Keri Vos (Nikhef National institute for subatomic physics (NL)), Michel Bertemes (Austrian Academy of Sciences (AT)), Tommaso Pajero (CERN)

42 Higher-order sum rules for multibody hadronic charm decays (20'+5')

Speaker: Margarita Gavrilova (Cornell)

43 Charmed baryons decays and CPV (20'+5')

Speaker: Zhi-Peng Xing (NanJing Normal University)

44 CP violation in charmed baryons at LHCb and Belle (II) (15'+5')

Speaker: Angelo Carbone (University of Bologna and INFN (IT))

45 Magnetic and electric dipole moments of charmed baryons at ALADDIN (25'+5')

Speaker: Sergio Javier Jaimes Elles

46 Charm prospects at FCC-ee (15'+5')

Speakers: Dominik Mitzel, Dominik Stefan Mitzel (Technische Universitaet Dortmund (DE))

Lunch

WG6

Conveners: Didar Dobur (Ghent University (BE)), Manuel Szewc, Dr Maria Moreno Llacer (Univ. of Valencia and CSIC (ES))

47 Theoretical predictions for toponium production at the LHC (20'+8')

Speaker: Giovanni Limatola

48 Spin correlation and entanglement in top and Higgs sector at LHC (22'+8')

Speaker: Dr Maria Moreno Llacer (Univ. of Valencia and CSIC (ES))

49 Search for pseudo-scalars decaying to top anti-top pairs and toponium (22'+8')

Speaker: Cristina Giordano (Austrian Academy of Sciences (AT))

50 Spin correlation and entanglement at colliders (20'+4')

Speaker: Simone Tentori (UCLouvain)

WG7

Conveners: Keri Vos (Nikhef National institute for subatomic physics (NL)), Michel Bertemes (Austrian Academy of Sciences (AT)), Tommaso Pajero (CERN)

51 Progress in lattice QCD in studying CPV and mixing in charm (27'+8')

Speaker: Felix Erben (CERN)

52 Mixing and time-dependent CP violation at LHCb (20'+5')

Speaker: Flo Reiss (University of Freiburg (DE))

53 Boosting the search for matter-antimatter asymmetries of oscillating charmed mesons with accelerators at LHCb (8 + 2')

Speaker: Maurizio Martinelli (Universita & INFN, Milano-Bicocca (IT))

WG4 & WG5 & WG7

54 Simultaneous determination of $\gamma$ and charm mixing and CPV parameters at LHCb (20'+5')

Speaker: Alessandro Bertolin (Universita e INFN, Padova (IT))

55 Global fit analysis of $\gamma$ and charm mixing and CPV parameters (UTFit) (20'+5')

Speakers: Luca Silvestrini, Luca Silvestrini (INFN, Rome)

Coffee break

WG1

Conveners: Bai-Cian Ke baiciank, Gregorio Herdoiza, Leah Broussard (Oak Ridge National Laboratory)

56 Measurement of the Neutron Lifetime at J-PARC (20'+4')

Speaker: Prof. Kenji Mishima

57 Measurement of Neutron Decay Correlations in Nab (20'+4')

Speaker: Dr Wolfgang Schreyer

58 Data-driven methods for radiative corrections in Vud / Vus (20'+4')

Speaker: Mikhail Gorshteyn

59 Review of lattice results for Vus and Vud (20'+4')

Speaker: James Simone

60 DIscussion

WG4 & WG5 & WG7

61 BESIII measurement of strong parameters of charm decays (22'+8')

Speaker: Shunan Zhang (University of Oxford (GB))

62 HFLAV news (22'+8')

Speaker: Ulrik Egede (Monash University (AU))

WG4 & WG5

63 Report from CKMfit (15'+5')

Speaker: Olivier DESCHAMPS

64 Time-dependent measurement of γ at LHCb (15'+5')

Speaker: Anna Lupato (Università di Bergamo & INFN Padova)

65 Prospect for measurement of CP-violating observables in Bs->DsK decays at a future Z factory (15'+5')

Speaker: Shanzhen Chen (Chinese Academy of Sciences (CN))

HFLAV meeting

Conveners: Mirco Dorigo (INFN Trieste), Ulrik Egede (Monash University (AU))

Wednesday 17 September

WG1

Conveners: Bai-Cian Ke baiciank, Gregorio Herdoiza, Leah Broussard (Oak Ridge National Laboratory)

66 Summary and prospects of experimental results for Vus (20'+4')

Speaker: Joel Swallow

67 Lattice results regarding electromagnetic corrections to hadronic decays (20'+4')

Speaker: Antonin Portelli

68 tau inclusive decays including QED radiative corrections (20'+4')

Speaker: Matteo Di Carlo

69 Experimental studies of leptonic D decays (20'+4')

Speaker: Xiao Wu

70 Experimental studies of semileptonic D decays (20'+4')

Speaker: Hui Li

WG2

Conveners: Abhijit Mathad (CERN), Judd Harrison, Markus Tobias Prim (University of Bonn (DE)), Martin Jung (Università di Torino & INFN)

71 Status and prospects of LFU and angular measurements at Belle II (20'+4')

Speaker: Ilias Tsaklidis (University of Bonn)

72 Tests of LFU in tree-level b-hadron decays at LHCb (20'+4')

Speaker: Alessandra Gioventù (University of Barcelona (ES))

73 Angular analyses of charged current decays at LHCb (20'+4')

Speaker: Hasret Nur (University of Glasgow (GB))

74 $B \to D^*$ angular analyses (20'+4')

Speaker: Ludovico VITTORIO

75 S-wave contributions to $B \to D\pi\ell\nu$ decays (20'+4')

Speaker: Raynette Van Tonder (Karlsruhe Institute of Technology)

Coffee break

WG3

Conveners: Eluned Anne Smith (Massachusetts Inst. of Technology (US)), Méril REBOUD (CNRS - IJClab), Radoslav Marchevski (École Polytechnique Fédérale de Lausanne (EPFL)), Slavomira Stefkova

76 B -> K nu nu measurements and prospects (18'+4')

Speakers: Eldar Ganiev (INFN - National Institute for Nuclear Physics), Eldar Ganiev (DESY), Eldar Ganiev (Budker Institute of Nuclear Physics (RU))

77 Experimental status of B -> K tau tau (18'+4')

Speakers: Niharika Rout, Niharika Rout (INFN Trieste), Niharika Rout

78 Overview of the lepton flavour violating b -> s l l’ decays (18'+4')

Speaker: Matteo Rama (INFN Pisa (IT))

79 What can we learn from the B -> K nu nu measurements? (18'+4')

Speaker: Salvador ROSAURO-ALCARAZ

WG6

Conveners: Didar Dobur (Ghent University (BE)), Manuel Szewc, Dr Maria Moreno Llacer (Univ. of Valencia and CSIC (ES))

80 W mass measurement (22'+8')

Speaker: Cristina Alexe (INFN Pisa)

81 Searches for heavy resonances (HNL, Leptoquarks, VLQ) (22'+8')

Speakers: Pedro Salvador Urrejola Pereira (Johannes-Gutenberg-Universitaet Mainz (DE)), Pedro Urrejola (Universidad San Sebastian (USS) (CL))

82 Future physics prospects at HL-LHC (20'+8')

Speaker: Paola Mastrapasqua (Universite Catholique de Louvain (UCL) (BE))

Lunch

SAC meeting

Social activity

Thursday 18 September

WG1

Conveners: Bai-Cian Ke baiciank, Gregorio Herdoiza, Leah Broussard (Oak Ridge National Laboratory)

83 Lattice results regarding D-meson decays relevant for the Vcd and Vcs (20'+4')

Speaker: Simon Kuberski

84 Results in phenomenology relevant to Inclusive D decays (20'+4')

Speaker: Qin Qin

85 Results in Effective Field Theory relevant to Vcs and Beyond Standard Model (20'+4')

Speaker: Danny van Dyk

86 Electromagnetic corrections to leptonic Ds decays (20'+4')

Speaker: Aritra Biswas

87 Prospects of experimental studies in the charm sector (20'+4')

Speaker: Yu Zhang

WG6

Conveners: Didar Dobur (Ghent University (BE)), Manuel Szewc, Dr Maria Moreno Llacer (Univ. of Valencia and CSIC (ES))

88 Theoretical overview on CP-violation at high pT (20'+8')

Speaker: Victor Miralles (University of Manchester)

89 Search for CP-violation in top production and decay at LHC (22'+8')

Speakers: Haichen Wang, Haichen Wang (Lawrence Berkeley National Lab. (US))

90 LFU and LFV in top quark processes at LHC (22'+8')

Speaker: Soureek Mitra (Indian Institute of Science Education and Research Mohali (IN))

91 Single top production and direct measurement of Vtd, Vts, Vtb at LHC (22'+8')

Speaker: Mohammed Faraj (Abdus Salam Int. Cent. Theor. Phys. (IT))

Coffee break

WG3

Conveners: Eluned Anne Smith (Massachusetts Inst. of Technology (US)), Méril REBOUD (CNRS - IJClab), Radoslav Marchevski (École Polytechnique Fédérale de Lausanne (EPFL)), Slavomira Stefkova

92 Lepton Flavour Universality tests in FCNC (15'+5')

Speakers: Alex Marshall (University of Bristol (GB)), Alexander Mclean Marshall

93 Latest news from b -> s mu mu at LHCb (15'+5')

Speaker: Eluned Anne Smith (Massachusetts Inst. of Technology (US))

94 Angular analysis of b -> s ee at LHCb (15'+5')

Speaker: Lorenzo Paolucci (The University of Manchester (GB))

95 Theory update for b -> sll decays (15'+5')

Speakers: Bernat Capdevila, Javier Virto (Universitat de Barcelona)

96 Rare and radiative Bs -> mu mu gamma (15'+5')

Speaker: Camille Normand (University of Bristol (GB))

97 Rare B decays at CMS and Atlas (15'+5')

Speaker: Valeriia Lukashenko (University of Zurich (CH))

WG4

Conveners: Chen Chunhui (Iowa State University-Unknown-Unknown), Eleftheria Malami, Peilian Li (University of Chinese Academy of Sciences)

98 Measurements of mixing-induced CP violation at LHCb (20'+4')

Speaker: Alberto Bellavista (Universita e INFN, Bologna (IT))

99 Measurement of Bs mixing parameters at LHCb (20'+4')

Speaker: Jamie Gooding (Technische Universitaet Dortmund (DE))

100 Measurements of sin(2φ1) and sin(2φ1eff) at Belle and Belle II (20'+4')

Speaker: Chunhui Chen (Iowa State University (US))

101 B-Bbar mixing: Width difference and CP asymmetry in flavour-specific decays at next-to-next-leading order of QCD and more (20'+4')

Abstract:
I present new results for the QCD corrections to the leading term in the
1/m_b expansion of the B-B-bar decay matrix element, which is now
completely determined to three-loop order. These results permit a more
precise Standard-Model prediction of the width differences Delta
Gamma_{d,s} and the CP asymmetries in flavour-specific
(e.g. semi-leptonic) decays, a_{fs}^{d,s}, for the Bd-Bd-bar and
Bs-Bs-bar mixing complexes. The perturbative uncertainty of the
well-measured Delta Gamma_s now matches the experimental error. I
further discuss the benefits of better measurements of Delta Gamma_d and
a_{fs}^d, which will provide novel insight into possible new physics in
Bd-Bd-bar mixing.

Speaker: Prof. Ulrich Nierste

102 How large could CP violation in B meson mixing be? Implications for baryogenesis and upcoming searches (20'+4')

Speaker: Mr Carlos Miró Arenas (IFIC (CSIC - U. Valencia))

Lunch

WG2

Conveners: Abhijit Mathad (CERN), Judd Harrison, Markus Tobias Prim (University of Bonn (DE)), Martin Jung (Università di Torino & INFN)

103 Leptonic B decays: B → lν at Belle II (22'+8')

Speaker: Daniel Jacobi (University of Bonn)

104 $B \to X_u$ decays (22'+8')

Speaker: Dr Keri Vos (University of Maastricht)

105 $B \to X_c$ decays (22'+8')

Speaker: Gael Finauri

106 $B_s->D_s^{**}$ decays using lattice QCD (22'+8')

Speaker: Alessandro Barone (Johannes Gutenberg University Mainz)

WG4

Conveners: Chen Chunhui (Iowa State University-Unknown-Unknown), Eleftheria Malami, Peilian Li (University of Chinese Academy of Sciences)

107 Measurements of time-dependent CP violation in the gluonic and radiative penguin decays at Belle and Belle II (22'+8')

Speaker: Shun Watanuki

108 New measurement of B0 lifetime at ATLAS (22'+8')

Speaker: Wolfgang Walkowiak (Universitaet Siegen (DE))

WG5

Conveners: Jordy Butter (University of Cambridge (GB)), Maria Laura Piscopo (Nikhef), Xiaodong Shi (KEK)

109 CPV in b-baryon decays (22'+8')

Speaker: Prof. Fu-Sheng Yu (Lanzhou University)

110 CPV in baryon decays at LHCb (22'+8')

Speaker: Patrik Adlarson (Uppsala University (SE))

Coffee break

WG2

Conveners: Abhijit Mathad (CERN), Judd Harrison, Markus Tobias Prim (University of Bonn (DE)), Martin Jung (Università di Torino & INFN)

111 Model-independent parameterization of $B \to \pi\pi\ell\nu$ decays (20'+6')

Speaker: Florian Herren (UZH)

112 Unitarity bounds for $B$ decays with subthreshold cuts (20'+6')

Speaker: Méril REBOUD (CNRS - IJClab)

113 $B_{(s)} \to \pi(K)$ form factors using lattice QCD (20'+6')

Speaker: Logan Roberts (University of Glasgow)

114 Phenomenology of $B_{(s)}$ and $D_{(s)}$ semileptonic decays to $\eta$ and $\eta^\prime$ (20'+6')

Speaker: Blazenka Melic (IRB, Zagreb)

WG5

Conveners: Jordy Butter (University of Cambridge (GB)), Maria Laura Piscopo (Nikhef), Xiaodong Shi (University of Science and Technology of China)

115 Overview of recent progress in QCD factorisation for non-leptonic B-meson decays (20'+5')

Speaker: Philipp Böer

116 Recent results on B → VV decays at LHCb (20'+5')

Speaker: Matthew David Monk (University of Warwick (GB))

117 Multi-body charmless decays at LHCb (20'+5')

Speaker: Edoardo Mariani (Centre National de la Recherche Scientifique (FR), LPNHE, Sorbonne Université)

118 Updated study of CP asymmetries and SU(3)F breaking effects in B2pipi, KK, Kpi (20'+5')

Speaker: Marta Burgos Marcos (Nikhef National institute for subatomic physics (NL))

Conference dinner

Friday 19 September

Plenary session: WG summaries

119 WG1 summary

120 WG2 summary

121 WG3 summary

122 WG4 summary

Coffee break

Plenary session: WG summaries

123 WG5 summary

124 WG6 summary

125 WG7 summary

Closing