RADCOR 2019

Session

Tuesday Afternoon A

10 Sept 2019, 14:30

Chambre du Trésorier

Conveners

Tuesday Afternoon A

• Stefan Weinzierl (Universität Mainz)

Tuesday Afternoon A

• Roberto Pittau (Universidad de Granada (ES))

62. Recent developments in q_T subtraction: EW corrections and power suppressed contributions

Luca Buonocore (INFN - National Institute for Nuclear Physics)

10/09/2019, 14:30

qT subtraction represents a well established and successful formalism to deal with the computation of QCD radiative corrections up to NNLO (and beyond) for a large class of processes relevant at the LHC. We have explored the possibility to extend qT subtraction to the computation of EW corrections with the (final) aim to develop a subtraction formalism suitable for the computation of mixed...

42. Completing the four-body contributions to $\bar{B}\rightarrow X_s \gamma$ at NLO

Lars-Thorben Moos

10/09/2019, 15:00

The inlusive radiative $\bar{B}\rightarrow$ $X_s \gamma$ decay constitutes an important pillar in the indirect search for new physics and allows to constrain the parameter space of many models.
In this talk we present the ongoing efforts in the computation of four-body contributions to the process $\bar{B}\rightarrow$ $X_s \gamma$, namely those of $b\ \rightarrow s\bar{q}q\gamma$ at NLO in the...

25. Non-leptonic B-decays at two-loops in QCD Factorisation

Tobias Huber (University of Siegen)

10/09/2019, 15:30

I will present the calculation of and results for the two-loop penguin amplitudes appearing in non-leptonic B-decays in the framework of QCD Factorisation. I will discuss the details of the computation of this genuine two-loop, two-scale problem, focusing i) on the analytic computation of the master integrals and ii) on the (partially analytic) convolution of the hard kernel with the...

12. Charm mass dependent NNLO corrections to $\mathcal{B}(\bar{B} \rightarrow X_s \gamma)$

Abdur Rehman (KIT, NCP (PK))

10/09/2019, 16:00

B

The inclusive radiative decay of the B meson is known to provide strong constraints on new particles and their interactions. The current experimental world average for its branching ratio is $(3.32 \pm 0.15) \cdot 10^{-4}$ which agrees within one sigma with the present SM prediction $(3.36 \pm 0.23) \cdot 10^{-4}$. Some of the NNLO QCD corrections are included with the help of interpolation in...

84. Probing the scalar potential via double Higgs boson production at hadron colliders

Dr Ambresh Shivaji (IISER Mohali)

10/09/2019, 17:00

Independent Measurements of Higgs self-couplings are crucial to probe new physics effects in the Higgs sector. Gluon fusion is the dominant mode for double Higgs production at hadron colliders. At leading order it is sensitive to the trilinear Higgs self-coupling. At higher orders in electroweak theory, it also becomes sensitive to the quartic coupling. We present a sensitivity study on the...

65. Exploring the Higgs sector via Higgs boson pair production

Gudrun Heinrich (Max Planck Institute for Physics)

10/09/2019, 17:30

We show how anomalous trilinear Higgs boson couplings, as well as other anomalous couplings in the Higgs sector, impact the shapes of distributions in Higgs boson pair production. In particular we discuss the interplay between higher order QCD corrections and effects from physics beyond the Standard Model, parametrized by Effective Field Theory. We present new methods, partly based on machine...

38. Di-Higgs production in bottom quark annihilation at NNLO QCD

Prof. Ravindran Vajravelu (The Institute of Mathematical Sciences)

10/09/2019, 18:00

We present NNLO QCD corrections to production of pair of
Higgs bosons in bottom quark annihilation at the Large Hadron Collider.
We take into account all the partonic channels in five flavour scheme.
We find that these corrections are important for the reliable predictions
which are less sensitive to unphysical scales.