Challenges in Semileptonic B Decays

Session

Other

26 Sept 2024, 16:30

2. On the potential of Light-Cone Sum Rules without semi-global Quark-Hadron Duality

Alexandre Carvunis (Università di Torino)

26/09/2024, 16:30

The calculation of local form factors involved in the SM predictions of semileptonic
$B$-meson decays at low-$q^2$ is a crucial ingredient in the assessment of the $B$-anomalies.
We revisit their calculation in QCD Light-Cone Sum Rule with $B$-meson Light-Cone Distribution Amplitudes. In our strategy, we bypass the semi-global quark-hadron duality (QHD) approximation which usually...

16. Implications of SMEFT for semileptonic processes

Siddhartha Karmakar (Tata Institute of Fundamental Research)

26/09/2024, 17:00

The $SU(2)_L\times U(1)_Y$ invariance of the Standard Model Effective Field Theory (SMEFT) predicts multiple restrictions in the space of Wilson coefficients of $U(1)_{em}$ invariant effective lagrangians such as the Low-energy Effective Field Theory (LEFT), used for low-energy flavor-physics observables, or the Higgs Effective Field Theory (HEFT) in unitary gauge, appropriate for...

23. Novel approaches to determine $B^\pm$ and $B^0$ meson production fractions

Greg Landsberg (Brown University (US))

26/09/2024, 17:30

We propose novel methods to determine the $\Upsilon(4S)\to B^+B^-$ and $\Upsilon(4S)\to B^0\bar B^0$ decay rates. The precision to which they and their ratio are known yields at present a limiting uncertainty around 2% in measurements of absolute $B$ decay rates, and thus in a variety of applications, such as precision determinations of elements of the Cabibbo-Kobayashi-Maskawa matrix and...

19. Exploring CP Violation in Charged Semileptonic Decays

Abhijit Mathad (CERN)

27/09/2024, 09:00

This talk will focus on the measurement of CP violation in charged semileptonic decays. We will present the current status and prospects of precision measurements of CP asymmetry in B0 and Bs meson systems, which serve as stringent tests of the Standard Model. Additionally, we will explore the potential for CP asymmetry induced by new physics, emphasizing its role as a powerful null-test of...

14. Streamlining semileptonic analyses

Patrick Haworth Owen (University of Zurich (CH))

27/09/2024, 09:30

Semileptonic measurements take a very long time. Particularly at LHCb where the datasets are large and background control is very important and fiddly. Most of these reasons are inherent to the measurements themselves but there are a few aspects which are repeated for each analysis which could be streamlined. This talk will open a broad discussion of how to streamline with a few proposals of...