Project C2b: Exclusive non-leptonic and rare $b$-quark decays

Principal Investigator
Prof. Dr. Thorsten Feldmann University of Siegen
Dr. Tobias Huber University of Siegen

Subject

This project deals with theoretical predictions and phenomenological implications for exclusive non-leptonic, rare semi-leptonic and radiative b-hadron decays. We will use factorisation and effective-field-theory methods to understand hadronic uncertainties in different flavour observables. We will present phenomenological updates for angular observables and partial decay rates, and extend our studies to possible flavour structures of physics beyond the Standard Model.

Topics

  1. NNLO QCD corrections: two loop corrections to scalar penguin amplitude in non-leptonic decays; higher-order corrections to annihilation topologies
  2. QED corrections in the factorization framework: Semi-leptonic operators in $B \to K^{(*)}\ell^+\ell^-$; hadronic operators in $B \to K^{(*)} \ell^+\ell^-$ and non-leptonic decays; QED corrections to heavy-to-light form factors; isospin-violating observables and violation of lepton-flavour universality.
  3. Power corrections in exclusive $B$-meson decays: factorization of endpoint divergencies in $B \to \pi$ form factor; extension to non-leptonic and rare decays
  4. Phenomenology of Non-leptonic Decays: comprehensive NNLO analysis of $B \to PP,PV,VV$ decays; combination of QCDF with flavour-symmetries of the light quarks; two-body decays beyond the quasi-particle approximation;
  5. Phenomenology of rare semi-leptonic and radiative decays: precision phenomenology for $B\to K^{(*)}\ell^+\ell^-$ at large hadronic recoil realistic parametrization of hadronic resonances beyond factorization, rare radiative decays of $B_s$, $B_c$ and $\Lambda_b$.
P3H-25-024
Title: Non-leptonic weak decays of heavy $B$ mesons
Type: Paper
Authors: Thorsten Feldmann, Keri K. Vos
arXiv: N.A.
Info: invited contribution to Encyclopedia of Particle Physics
P3H-25-008
Title: Non-factorisable effects in the decays $\bar B_{s}^0 \to D_{s}^+ \pi^-$ and $\bar B^0 \to D^+ K^-$ from LCSR
Type: Paper
Authors: Maria Laura Piscopo, Aleksey V. Rusov
arXiv: 2307.07594
Info: Published in JHEP 10 (2023) 180
P3H-25-006
Title: CP Violation in $B \to K \ell^+\ell^-$ Decays: New Opportunities in the High-Precision Era
Type: Proceedings
Authors: Anders Rehult, Robert Fleischer, Eleftheria Malami, K. Keri Vos
arXiv: 2404.07588
Info: CORFU2023, arXiv:2404.07588
P3H-25-005
Title: New Probes of Electron-Muon Universality in $B \to K \ell^+\ell^-$ Decays
Type: Proceedings
Authors: Robert Fleischer, Eleftheria Malami, Anders Rehult, K. Keri Vos
arXiv: 2310.04170
Info: Beauty 2023
P3H-25-004
Title: A new puzzle in non- leptonic B decays
Type: Proceedings
Authors: Aritra Biswas, Sébastien Descotes-Genon, Joaquim Matias, Gilberto Tetlalmatzi-Xolocotzi
arXiv: 2309.11179
Info: FPCP 2023
P3H-25-003
Title: Taming Penguins: Towards High Precision Measurements in $\phi_d$ and $\phi_s$
Type: Proceedings
Authors: Kristof De Bruyn, Robert Fleischer, Eleftheria Malami
arXiv: 2501.09414
Info: 9th Symposium on Prospects in the Physics of Discrete Symmetries (DISCRETE 2024) 2-6 December, 2024
P3H-24-086
Title: Collider-Flavour Complementarity from the bottom to the top
Type: Paper
Authors: Oliver Atkinson, Christoph Englert, Matthew Kirk, Gilberto Tetlalmatzi-Xolocotzi
arXiv: https://arxiv.org/pdf/2411.00940
Info:
P3H-24-030
Title: WG5 summary: Direct CP violation (DCPV) including $\phi_{3}/\gamma$ from $B\to DK$, DCPV effects, branching fractions and polarisation in charmless $B_{(s)}$ decays
Type: Proceedings
Authors: Melissa Cruz Torres, Tobias Huber, Minakshi Nayak, Gilberto Tetlamatzi-Xolocotzi
arXiv: https://arxiv.org/pdf/2405.10261
Info: CKM 2023 proceedings, WG 5 summary
P3H-24-027
Title: Targeting (Pseudo)-Scalar CP Violation with $B_s \to \mu^+\mu^-$
Type: Paper
Authors: Robert Fleischer, Eleftheria Malami, Anders Rehult, K. Keri Vos
arXiv: https://arxiv.org/pdf/2405.10366
Info: Published in JHEP 09 (2024) 183
P3H-24-020
Title: Optimised observables and new physics prospects in the penguin-mediated decays $B_{d(s)} \to K^{(*)0}\phi$
Type: Paper
Authors: Aritra Biswas, Sebastien Descotes-Genon, Joaquim Matias, Gilberto Tetlalmatzi-Xolocotzi
arXiv: https://arxiv.org/pdf/2404.01186
Info: Published in JHEP 08 (2024) 030
P3H-24-010
Title: Theoretical Highlights of CP Violation in 𝑩 Decays
Type: Proceedings
Authors: Eleftheria Malami
arXiv: 2402.16976
Info: 16th International Conference on Heavy Quarks and Leptons (HQL2023)
P3H-24-009
Title: Manifestations of CP Violation in the B Meson System: Theoretical Perspective
Type: Proceedings
Authors: Eleftheria Malami
arXiv: 2402.10023
Info: Proceedings paper of the Beauty Conference 2023
P3H-24-002
Title: Theory and LHCb experiment: Tango for two
Type: Proceedings
Authors: Eleftheria Malami, Abhijit Mathad
arXiv: N.A.
Info: Article for CERN Courier
P3H-23-105
Title: Two body non-leptonic $D^0$ decays from LCSR and implications for $\Delta A_{\rm CP}$
Type: Paper
Authors: Alexander Lenz, Maria Laura Piscopo, Aleksey Rusov
arXiv: 2312.13245
Info: Published in JHEP 03 (2024) 151
P3H-23-104
Title: Non-factorisable Contributions of Strong-Penguin Operators in $\Lambda_b \to \Lambda \ell^+\ell^-$ Decays
Type: Paper
Authors: Thorsten Feldmann, Nico Gubernari
arXiv: 2312.14146
Info: Published in JHEP 03 (2024) 152
P3H-23-099
Title: Structure-dependent QED effects in exclusive B-meson decays
Type: Review
Authors: Philipp Böer, Thorsten Feldmann
arXiv: 2312.12885
Info: Published in Eur. Phys. J. ST 233 (2024) 2, 299-323
P3H-23-047
Title: Refactorization of endpoint divergencies for the ${\cal O}_7$ contribution to $\bar B_s \to \mu^+\mu^-$
Type: Proceedings
Authors: Nicolas Seitz
arXiv: arXiv:2307.14216
Info: Published in PoS FPCP2023 061
P3H-23-014
Title: New Perspectives for Testing Electron-Muon Universality
Type: Paper
Authors: Robert Fleischer, Eleftheria Malami, Anders Rehult, K. Keri Vos
arXiv: 2303.08764
Info: Published in JHEP 06 (2023) 033
P3H-23-003
Title: A new puzzle in non-leptonic B decays
Type: Paper
Authors: Aritra Biswas, Sebastien Descotes-Genon, Joaquim Matias, Gilberto Tetlalmatzi-Xolocotzi
arXiv: 2301.10542
Info: Published in JHEP 06 (2023) 108
P3H-22-123
Title: Fingerprinting CP-violating New Physics with $B \to K \mu^+\mu^-$
Type: Paper
Authors: Robert Fleischer, Eleftheria Malami, Anders Rehult and K. Keri Vos
arXiv: 2212.09575
Info: Published in JHEP 03 (2023) 113
P3H-22-110
Title: On the contribution of the electromagnetic dipole operator ${\cal O}_7$ to the $\bar B_s \to \mu^+\mu^-$ decay amplitude
Type: Paper
Authors: Thorsten Feldmann, Nico Gubernari, Tobias Huber, Nicolas Seitz
arXiv: 2211.04209
Info: Published in Phys.Rev.D 107 (2023) 1, 013007
P3H-22-092
Title: Enhancing Bs → e+e− to an Observable Level in the Two-Higgs-Doublet Model
Type: Paper
Authors: Matthew Black, Alexis D. Plascencia, Gilberto Tetlalmatzi-Xolocotzi
arXiv: 2208.08995
Info: Published in Phys.Rev.D 107 (2023) 3, 035013
P3H-22-059
Title: Improved Theory Predictions for and Global Analysis of Exclusive $\boldsymbol{b\to s\ell^+\ell^-}$ Processes
Type: Paper
Authors: Nico Gubernari, Meril Reboud, Danny van Dyk, Javier Virto
arXiv: 2206.03797
Info: Published in JHEP 09 (2022) 133
P3H-22-040
Title: Some recent developments in nonleptonic $B$ decays
Type: Proceedings
Authors: Tobias Huber
arXiv: N.A.
Info: Proceedings contribution to CKM 2021
P3H-21-094
Title: EOS — A Software for Flavor Physics Phenomenology
Type: Paper
Authors: D. van Dyk, F. Beaujean, T. Blake, C. Bobeth, M. Bordone, K. Dugic, E. Eberhard, N. Gubernari, E. Graverini, M. Jung, A. Kokulu, S. Kurten, D. Leljak, P. Lughausen, S. Meiser, M. Rahimi, M. Reboud,R. Silva Coutinho, J. Virto, K.K. Vos
arXiv: 2111.15428
Info: Published in Eur.Phys.J.C 82 (2022) 6, 569
P3H-21-092
Title: Estimating QCD-factorization amplitudes through $SU(3)$ symmetry in $B\rightarrow P P$ decays
Type: Paper
Authors: Tobias Huber, Gilberto Tetlalmatzi-Xolocotzi
arXiv: 2111.06418
Info: Published in Eur.Phys.J.C 82 (2022) 3, 210
P3H-21-039
Title: Lepton flavour violation in rare $\Lambda_b$ decays
Type: Paper
Authors: Marzia Bordone, Muslem Rahimi, K. Keri Vos
arXiv: 2106.05192
Info: Published in Eur.Phys.J.C 81 (2021) 8, 756, Eur.Phys.J.C (2021) 81
P3H-21-021
Title: Lepton-Flavour Non-Universality of $\bar{B}\to D^*\ell \bar\nu$ angular distributions in and beyond the Standard Model
Type: Paper
Authors: Christoph Bobeth, Marzia Bordone, Nico Gubernari, Martin Jung, Danny van Dyk
arXiv: 2104.02094
Info:Published in Eur.Phys.J.C 81 (2021) 11, 984
P3H-21-016
Title: Exploiting dijet resonance searches for flavor physics
Type: Paper
Authors: Marzia Bordone, Admir Greljo, David Marzocca
arXiv:2103.10332
Info:Published in JHEP 08 (2021) 036
P3H-20-066
Title: Non-local matrix elements in $B_{(s)}\to \{K^{(*)},\phi\}\ell^+\ell^-$
Type: Paper
Authors: Nico Gubernari, Danny van Dyk, Javier Virto
arXiv: 2011.9813
Info:Published in: JHEP 02 (2021) 088
P3H-20-046
Title: Constraining flavour patterns of scalar leptoquarks in the effective field theory
Type: Paper
Authors: Marzia Bordone, Oscar Cata, Thorsten Feldmann, Rusa Mandal
arXiv: 2010-03297
Info:Published in JHEP 03 (2021) 122
P3H-20-037
Title: Three-Body Non-Leptonic Heavy-to-heavy $B$ Decays at NNLO in QCD
Type: Paper
Authors: Tobias Huber, Javier Virto, Keri Vos
arXiv: 2007.08881
Info: Published in: JHEP 11 (2020) 103
P3H-20-034
Title: A puzzle in B¯0(s)→D(∗)+(s){π−,K−} decays and extraction of the fs/fd fragmentation fraction
Type: Paper
Authors: Marzia Bordone, Nico Gubernari, Tobias Huber, Martin Jung, Danny van Dyk
arXiv: 2007.10338
Info:Published in: Phys.J.C 80 (2020) 10, 951
P3H-19-044
Title: Model-independent bounds on new physics effects in non-leptonic tree-level decays of B-mesons
Type: Paper
Authors: Alexander Lenz, Gilberto Tetlalmatzi-Xolocotzi
arXiv: 1912.07621
Info: published in JHEP 07 (2020) 177, JHEP07(2020)177
P3H-19-032
Title: Effective Theory Approach to New Physics with Flavour: General Framework and a Leptoquark Example
Type: Paper
Authors: Marzia Bordone, Oscar Cata, Thorsten Feldmann
arXiv: 1910.02641
Info:Published in JHEP 2001 (2020) 067