Flavorful Ways to New Physics

Oct 28, 2014, 8:00 AM → Oct 31, 2014, 6:00 PM Europe/Berlin

Waldhotel Zollernblick

The workshop is intended to bring together young PhD students and postdocs with international renown representatives of the field of flavor physics. The workshop is specifically intended for PhD students and young postdocs. The overview talks about four big topics in flavor physics are given by international experts. The informal atmosphere should lead to fruitful discussions between the young and the experienced scientists. Furthermore, the participants themselves are invited to present their own work. Thus all young academics will get insights into selected fields of current research.

We are proud to announce the confirmed invited speakers:

A. J. Buras (Munich): Quark Flavor

M. Gersabeck (Manchester): Charm Physics at LHCb
P. Krizan (Ljubljana): Belle and Belle II
M. Beneke (Munich): QCD Factorization
G. Perez (CERN/Rehovot): New Physics Models
W. Rodejohann (Heidelberg): Lepton Flavor

Cake Recipe black-forest-cake.pdf

Conference Picture fwnp_v3.jpg

Hotel Link http://www.zollernblick-lauterbad.de/

Poster workshop-poster.pdf

Practical Information info.pdf

Proceedings of Science http://pos.sissa.it/

Tuesday, October 28

Arrival

The shuttle bus leaves 11:00 am from Karlsruhe main station.

Lunch

Charm Physics at LHCb

1 Charm Physics at LHCb

Speaker: Dr Marco Gersabeck (The University of Manchester)

Slides Charm_Gersabeck.pdf

4:00 PM Coffee Break

Young Investigator Talks

2 Measuring Semileptonic Asymmetries in LHCb

The CP-violating flavour-specific asymmetry in neutral B mesons provides a method for testing the Standard Model. The measurements from the D0 experiment yield values of this asymmetry that disagree with the Standard Model, most recently at a level of 3.6 sigma. In this contribution, I will discuss the latest LHCb measurements in this sector for this asymmetry both from B0 mesons (asld) and B0s mesons (asls). Using their 2011 dataset, corresponding to an integrated luminosity of 1.0 fb-1 obtained in 2011, LHCb measured a value of asls = (-0.06 ± 0.50 (stat) ± 0.36 (syst))%, which is the most precise value of asls to date. Also, a new measurement on asld will be presented, based on the full LHC run-1 dataset.

Speaker: Suzanne Klaver (University of Manchester)

Slides 01-SemileptonicAsymmetries_SuzanneKlaver.pdf

3 Penguin Pollution in B^0 -> J/psi K^0 and B_s -> J/psi phi Decays

The size of the penguin pollution from the u-quark loop is under debate for many years, and this issue must be settled when future precise data on the famous mixing-induced CP asymmetries will be analysed to measure sin(2*beta) or beta_s. We have caluclated the penguin pollution from first principles, using methods of soft-collinear factorisation. (Earlier attempts to do such a calculation for the B-> J/psi K_S branching ratio around 12 years ago had failed. The situation for the penguin pollution, however, is different.)

Speaker: Mr Philipp Frings (Institute for Theoretical Particle Physics (TTP))

Slides 02-Presentation_Freudenstadt1.pdf

4 Search for the Rare Decay $B^0 \to \tau^+ \tau^-$ at Belle

In the Standard Model the decay $B^0 \to \tau^+ \tau^-$ is highly suppressed with a predicted branching ratio of $\mathcal{B}_{\rm{SM}}(B^0 \to \tau^+ \tau^-) \approx 3 \times 10^{-8}$. The BaBar collaboration estimated an upper limit of $\mathcal{B}< 4.1 \times 10^{-3}$ at the 90\% confidence level using a data sample of $232 \times 10^6$ $B\bar B$ pairs. The search presented in this talk is performed on data collected on the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The data sample contains $772 \times 10^6$ $B\bar B$ pairs, which is a factor three more than used in the BaBar analysis. For the analysis one of the $B$ mesons is fully reconstructed in hadronic decay modes using a hierarchical NeuroBayes-based algorithm. Using a multivariate analysis method the background is reduced to reach higher sensitivity. An expected upper limit on the branching ratio is estimated on simulated Monte Carlo events.

Speaker: Michael Ziegler (EKP)

5 NLO Corrections to Inclusive B Decays

Inclusive semileptonic B decays offer a possibility to test the Standard Model (SM) in its flavor structure. The relevant SM parameters are the quark mixing parameters that accompany these types of decays, gathered in the CKM matrix. In my talk I'm going to present the technique to determine the inclusive width of a heavy flavored meson which allow to extract the CKM matrix elements $V_{qb}$. As an approach we use the Heavy quark expansion and calculate analytically the perturbative QCD corrections to the power suppressed contribution of the chromo-magnetic operator. In the calculation the final state quark is treated as massless.

Speaker: Mr Denis Rosenthal (Uni Siegen)

Wednesday, October 29

Flavor Physics at Belle and Belle II

6 Flavor Physics at Belle and Belle II

Speaker: Prof. Peter Krizan (University of Ljubljana and JSI)

Slides flavorful-ways-2014-krizan.pdf

11:00 AM Coffee Break

Young Investigator Talks

7 Flavoured Dark Matter Beyond Minimal Flavour Violation

Flavour symmetries provide an appealing mechanism to stabilize the dark matter particle. I present a simple model of quark flavoured dark matter that goes beyond the framework of minimal flavour violation. I discuss the phenomenological implications for direct and indirect dark matter detection experiments, high energy collider searches as well as flavour violating precision data.

Speaker: Monika Blanke (CERN &amp; KIT)

Slides 01-Blanke-Freude2014.pdf

8 Two loop new physics corrections in rare decays

Speaker: Mr Christoph Wiegand (KIT)

Slides 02-cwiegand.pdf

9 A Solution to Singularities Arising at NLO in the Calculation of epsilon'/epsilon

Speaker: Mr Paul Tremper (KIT)

Slides 03-Freudenstadt_Tremper.pdf

Lunch

Quark Flavor Physics

10 Flavourful Ways to the Shortest Distance Scales Explored by Humans

Speaker: Prof. Andrzej Buras (TUM-IAS)

Slides Schwarzwald2014.pdf

4:00 PM Coffee Break

Evening Lecture

11 The Flavor of Economics

Speaker: Dr Felix Wick (Blue Yonder)

12 Conference Dinner

Thursday, October 30

New Physics Models

13 New Physics Models or On the Rare Occasions When Naturalness Meets Flavor

Speaker: Prof. Gilad Perez (Weizmann)

Slides Gilad_Perez_FlavorfulOct14.pdf

11:00 AM Coffee Break

Young Investigator Talks

14 Search for CP violation in D0->pi-pi+pi0 decays at LHCb

The LHCb experiment has recorded the world's largest sample of charmed meson decays. This contribution will present a new measurement involving for the first time a decay into a final state containing a neutral pion. The search for CP violation exploits a novel model-independent, un-binned technique to assign a p-value for the no CP violation hypothesis. With a data sample size exceeding that of previous measurements by almost an order of magnitude a significant step in sensitivity is expected.

Speaker: Mr Shanzhen Chen (University of Manchester)

Slides Shanzhen_30-10-2014_Flavorful_Ways_to_new_physics.pdf

15 Strong couplings from Light-cone sum rules

QCD Light-cone sum rules (LCSR) proved to be a reliable QCD based tool for the determination of form factors of heavy-to-light transitions like $B(D) \to \pi$. We revisit the LCSR for $B^*B\pi$ and $D^*D\pi$ strong couplings accessible via the same correlation function, employing the double dispersion relations. These sum rules are considerably improved by additional radiative corrections , updates of higher twist contributions and input parameters. We also probed various versions of double dispersion relations. The LCSRs were extended to strong couplings of heavy-light mesons containing a strange quark.

Speaker: Mr Patrick Gelhausen (University of Siegen)

Slides 02-LCSRVortragFW2.pdf

16 NNLO corrections to the decay B -> D pi

Hadronic decays of B mesons provide an essential contribution in testing the CKM structure of the Standard Model. It is therefore mandatory to increase the precision of their branching rations as much as possible, both experimentally and theoretically. In this talk we investigate the decay \bar B^0-> D^+\pi^- at NNLO in QCD factorization, a model-independent framework which disentangles perturbative from non-perturbative effects in the heavy-mass limit. We present the result for the two-loop correction to the hard scattering kernel, including calculational techniques such as Laporta reduction to master integrals and Mellin Barnes representations and differential equations for evaluating the latter.

Speaker: Ms Susanne Kraenkl (University of Siegen)

Slides 03-Freudenstadt_2014.pdf

17 The bottom quark mass from non-relativistic sum rules at NNNLO

Decays of B mesons scale with high powers of the bottom quark mass. To avoid large parametric uncertainties precise knowledge of this parameter is important. We determine the mass of the bottom quark from moments of the $b\bar{b}$ production cross section near threshold. On the theory side we use NNNLO predictions both for the resonances and the continuum cross section. We compare our result to other recent precision determinations.

Speaker: Mr Thomas Rauh (TU Munich)

Slides bmass_FW.pdf

Lunch

QCD Factorization

18 QCD Factorization

Speaker: Prof. Martin Beneke (TU Muenchen)

Slides freudenstadt.pdf

19 Social Event

Friday, October 31

Lepton Flavor Physics

20 Lepton Flavor (and Number) Physics

Speaker: Dr Werner Rodejohann (MPIK)

11:00 AM Coffee Break

Young Investigator Talks

21 Lifting degenerate neutrino masses, threshold corrections and maximal mixing

Speaker: Mr Wolfgang G. Hollik (KIT)

Slides 01-FDS_wghollik.pdf

22 New Physics in \Delta \Gamma_d

Motivated by the recent measurement of the dimuon asymmetry by the D{\O} collaboration, which could be interpreted as an enhanced decay rate difference in the neutral B_d-meson system, we investigate the possible size of new-physics contributions to \Delta\Gamma_d. In particular, we perform model-independent studies of non-standard effects associated to the dimension-six current-current operators (d^{-}p)(p^{-}′b) with p,p′=u,c as well as (d^{-}b)(\tau^{-}\tau). In both cases we find that for certain flavour or Lorentz structures of the operators sizable deviations of \Delta \Gamma_d away from the Standard Model expectation cannot be excluded in a model-independent fashion.

Speaker: Mr Gilberto Tetlalmatzi-Xolocotz (Durham University)

Slides 02-Giltx.pdf

23 A Left-Right Symmetric Model with doublets

Left-Right Symmetric Models (LRSM) attempt at giving an understanding of the violation of parity (or charge-conjugation) by the weak interactions in the SM through the introduction of right-handed currents. The spontaneous symmetry breaking of SU(2)_LxSU(2)_RxU(1)_(B-L) is usually triggered by an enlarged Higgs sector, usually consisting of two triplet fields (left-right symmetry breaking) and a bi-doublet (electroweak symmetry breaking). I reconsider an alternative LRSM with doublet instead of triplet fields and a Higgs bi-doublet. After explaining some features of this model, I discuss constraints on its parameters using electroweak precision and neutral-meson mixing observables, combining them using the CKMfitter frequentist statistical framework.

Speaker: Mr Luiz Henrique Vale Silva (Laboratoire de Physique Theorique)

Slides 03-Talk_VALE.pdf

24 Lepton Flavor Violation in the SM with general Dimension-6 Operators

I will talk about lepton flavor observables in the charged lepton sector in the general extension of the Standard Model, where possible New Physics effects are parametrized by the dimension-5 and -6 operators constructed from the SM fields. I will discuss the radiative lepton flavor violating decays $\ell_i\to\ell_j\gamma$ as well as closely related charged lepton electric dipole moment and anomalous magnetic moments. We will also discuss the three body charged lepton flavor violating decay at the tree level and the $Z^0$ decays into pair of leptons of different flavors.

Speaker: Ms Saereh Najjari (University of Warsaw)

Slides 04-cLFv_Najjari.pdf

Lunch/ Depature