Christoph Schwanda
(Austrian Academy of Sciences)
4/15/13, 9:00 AM
In this talk we review recent results from the Belle, BaBar and LHCb experiments, relevant to the topic of this workshop. In particular we will examine the experimental situation of the Cabibbo-Kobayashi-Maskawa matrix elements |Vcb| and |Vub| and review new measurements of semileptonic and leptonic B meson decays involving a tau-lepton. Also new results in the Bs sector will be examined. The...
Prof.
Joaquim Matias
(Universitat Autonoma Barcelona)
4/15/13, 9:35 AM
We present a complete and comprehensive analysis of the $B\to K^*(\to K\pi) \ell^+\ell^-$ decay, focusing on clean CP-averaged and CP-violating observables both at large and low hadronic recoil. For that purpose we define a complete set of clean CP-asymmetries (P_i^{CP}) related to the clean observables Pi. We present predictions within the Standard Model for all the relevant observables
of...
Gustavo Branco
(Instituto Superior Tecnico)
4/15/13, 9:57 AM
We illustrate how weak basis invariants can be a very useful tool
to study Flavour and CP Violation in the SM and Beyond.
Paolo Gambino
(Universita e INFN (IT))
4/15/13, 10:19 AM
I summarize recent progress in the determination of the CKM matrix in semileptonic B decays.
Fulvia De Fazio
(INFN - Sezione di Bari)
4/15/13, 11:00 AM
I shall discuss strategies towards the indirect detection of new physics from flavour observables.
Robert Fleischer
(Nikhef and Vrije Universiteit Amsterdam)
4/15/13, 11:22 AM
The rare decay $B_s \to \mu^+\mu^-$ plays a key role for the testing of the Standard Model. It is discussed that the sizable decay width difference $\Delta\Gamma_s$ of the $B_s$-meson system affects this channel. As a consequence, its calculated Standard Model branching ratio has to be upscaled by about 10% to $(3.56\pm0.18)\times 10^{-9}$. This prediction is the reference value for the...
Martin Gorbahn
(Liverpool University)
4/15/13, 11:44 AM
The B_q to mu^+ mu^- theory prediction is sensitive to the
renormalisation scheme used for sin_W. The scheme ambiguity is the
source of the dominant theory uncertainty in the standard
model. Additionally the renormalization is rather involved in new physics models
where M_Z cos_W = M_W does not hold at tree level. In this talk I will
present the results of a two-loop electroweak...
Claudia Hagedorn
(University of Padua and SISSA)
4/15/13, 12:06 PM
I will discuss possibilities to predict CP phases in the lepton sector with the help of non-abelian discrete flavour symmetries (and CP symmetries). I will show that the breaking of a non-abelian discrete flavour group to residual symmetries in the charged lepton and neutrino sectors not only allows for predictions of the mixing angles, but also of the Dirac phase. Furthermore, I will present...
Ivan Nisandzic
(J. Stefan Institute)
4/15/13, 12:28 PM
Semi-leptonic B decays are important test of the Standard Model (SM) and
present the possibility to explore the eects of physics Beyond Standard Model
(BSM). Decays involving tau leptons in the nal state are interesting due to the
tau mass eects which allow to probe the contributions to the decay rate which
are not present in the decay containing light lepton in nal state. Recently,...
Giovanni Villadoro
(ICTP)
4/15/13, 2:30 PM
I will present the implication of the latest LHC results for natural and unnatural SUSY models.
Michal Malinsky
(IPNP, Charles University in Prague)
4/15/13, 2:52 PM
We analyze the correlation between the present and foreseen limits on matter instability and the upper bounds on the mass of an intermediate-to-EW-scale color octet scalar in the minimal non-supersymmetric SO(10) grand unification. A dedicated two-loop analysis reveals a tight correlation between the octet mass and the unification scale which either requires the octet to be within the reach of...
Dr
Luca Di Luzio
(Karlsruhe Institute of Technology)
4/15/13, 3:14 PM
It was shown recently that the original SU(5) theory of Georgi and Glashow, augmented with an adjoint fermionic multiplet, is compatible both with neutrino masses and gauge coupling unification. In particular, the latter predicts the existence of light O(TeV) electroweak triplet states. We compute the correlation between the triplet masses and the unification scale at the NNLO level. Such an...
Prof.
Amon Ilakovac
(Faculty of Science, University of Zagreb)
4/15/13, 3:36 PM
Charged lepton flavour violaton (LFV) is studied in the low-scale see saw models of minimal supergravity and with large Yukawa couplings realized through approximate lepton number symmetries. The models have two sources of LFV, one originating from the soft
supersymmetry-breaking sector, and the other entirely supersymmetric one originating from the supersymmetric Yukawa sector. These sources...
Margarida Nesbitt Rebelo
(Instituto Superior Tecnico (IST))
4/15/13, 3:58 PM
Suppression of HFCNC: NFC, Aligned, MFV
Comments on present situation taking into account
recent LHC data and data from B-factories.
Weak Basis invariants as a tool to study the flavour
sector of 2HDM.
Prof.
Ilja Doršner
(University of Sarajevo)
4/15/13, 4:35 PM
I address the issue of model dependence of partial proton decays due to exchange of a single scalar leptoquark within a minimal viable SU(5) framework. The minimal setup predicts a flavor part of the proton decay widths for channels with anti-neutrinos in the final state to depend solely on the known masses and mixing parameters of the quark sector and one extra phase. I accordingly establish...
Gauthier Durieux
(CP3 - UCLouvain)
4/15/13, 6:03 PM
While stringent constraints have been obtained at low energies, systematic and direct tests of the baryon and lepton number conservations have not been carried out at the current energy frontier. We observe that the flavour symmetries of the Standard Model gauge sector, broken as they are in the Standard Model Yukawa one, naturally suppress baryon and lepton number violation at low energy and,...
Marina Cobal
(Universita degli Studi di Udine (IT))
4/16/13, 9:00 AM
A review talk is given on the status of SM Higgs physics and top properties at ATLAS, CMS and Tevatron
Prof.
Ernest Ma
(University of California, Riverside)
4/16/13, 9:35 AM
A successful flavor symmetry for quarks and leptons should have a good explanation of why the observed 126 GeV Higgs boson is very close to that of the standard model. Such a model based on the discrete symmetry S(3) was already proposed in 2004, but this issue was not studied. To support the S(3) symmetry, this model has three Higgs doublets, but the lightest one is naturally almost the...
Manuel Perez-Victoria
(University of Granada)
4/16/13, 10:40 AM
I will discuss an effective Lagrangian description of new vector bosons giving resonant leptonic signals at the LHC. Gauge invariance imposes relations on the couplings and masses of charged and neutral vector bosons. I will show that a combined analysis of di-lepton and lepton-plus-missing-energy data takes advantage of such relations and improves the existing limits.
Radja Boughezal
(Argonne National Laboratory)
4/16/13, 11:02 AM
In this talk, we will present new results for the differential cross-section of Higgs
boson production in gluon fusion in association with a hadronic jet at next-to-next-to-leading order (NNLO) in perturbative QCD.
This result is urgently needed in order to reduce the theoretical uncertainties hindering a precise extraction of the Higgs properties at the LHC. Currently, the theoretical...
Prof.
Ivica Picek
(University of Zagreb)
4/16/13, 11:24 AM
The loop-mediated higgs decays constrain the model parameter space
of the neutrino mass mechanism based on the fermionic quintuplet
in conjunction with the scalar quadruplet. The most significant increase to the higgs to diphoton decay width comes from a doubly charged scalar component, which should be the lightest component in the scalar quadruplet. There is an anti-correlation to the h...
francesco Sannino
(CP3-Origins)
4/16/13, 11:46 AM
I will discuss the impacts of the LHC findings on composite dynamics at the electroweak scale. I will show that current results are compatible with dynamical electroweak symmetry breaking once the electroweak radiative corrections are taken properly into account. I will then show some of the most relevant signatures for the LHC helpful to single out composite dynamics.
Admir Greljo
(Institute Jozef Stefan)
4/16/13, 12:08 PM
Based on two model studies I will discuss how the recent Higgs measurements can be used to constrain new physics effects. The first example concerns colored scalars inherent to theories of matter unification. Using existing Higgs data, nontrivial constraints on scalars with masses of a few hundreds of GeV can be obtained. The second study concerns vector-like fermions mixing with SM quarks....
Diego Guadagnoli
(LAPTh Annecy)
4/16/13, 2:30 PM
The Bs to µµ decay is one of the milestones of the flavor program at the LHC. I will touch on certain aspects of the connection between the experimental and the theoretical observable. I will then discuss the impact of this observable on SM extensions, focusing on minimally model-dependent frameworks such as MFV or partial compositeness. It turns out that its constraining power is, depending...
Mikolaj Krzysztof Misiak
(University of Warsaw (PL))
4/16/13, 2:52 PM
Recent contributions to the evaluation of B -> Xs gamma and Bs -> mumu
branching ratios at the next-to-next-to-leading order in QCD will be
described. They include matching calculations at the electroweak scale as well as matrix element determination at the low energy scale.
Sébastien Descotes-Genon
(LPT)
4/16/13, 3:14 PM
I discuss the constraints on the Wilson Coefficients of the effective Hamiltonian from B radiative decays within the frequentist approach developed by the CKMfitter group. A particular attention will be paid to the treatment of hadronic inputs and the sensitivity of observables (currently measured or planned to be) on this issue.
Roman Zwicky
(edinburgh university)
4/16/13, 3:58 PM
I will discuss the isospin asymmetry in and beyond the SM at low q2 (large recoil).
Susanne Westhoff
(University of Pittsburgh, PITT-PACC)
4/16/13, 5:17 PM
Top-quark physics provides us with a portal to potential physics beyond the standard model. To date, the only evidence of an anomaly in top-quark physics is the large charge asymmetry observed at the Tevatron. Shedding light on this anomaly by measuring a charge asymmetry at the LHC, however, is a difficult endeavor. I will discuss the prospects to observe a charge asymmetry in top-antitop...
Juan Antonio Aguilar Saavedra
(University of Granada, University of Coimbra, LIP and IFCA)
4/16/13, 5:39 PM
We present the current status of the Tevatron charge asymmetry and its sister asymmetry at the LHC. The relation between both is elucidated, using as framework the collider-independent asymmetries they originate from. Other related observables, such as the t tbar differential distribution and top polarisation, are also discussed.
Dr
Stéphane Lavignac
(IPhT Saclay (CEA, France))
4/17/13, 9:35 AM
Some experimental anomalies suggest the possible existence of light sterile neutrino(s) mixing with the active ones. In this talk, we discuss a scenario in which the sterile neutrino is the fermionic partner of the pseudo-Goldstone boson associated with the spontaneous breaking of an approximate global symmetry.
Diego Aristizabal
(Universite de Liege)
4/17/13, 9:57 AM
In bilinear R-parity violation (BRpV), in which the superpotential includes a bilinear term between the lepton doublet and the up-type Higgs superfields, a sneutrino LSP can decay into pairs of heavy standard model states: W's, Z's, tops or Higgs bosons. These finals states can dominate over the traditionally considered bottom pair final state, yielding unique and novel supersymmetric signals...
Marco Cirelli
(IPhT Saclay,CNRS & CEA)
4/17/13, 11:00 AM
I will briefly discuss some recent results and anomalies in the field of Cosmic Neutrinos, Dark Matter Direct Detection, Dark Matter Indirect Detection and (possibly) High Energy Cosmic Rays, with an emphasis on the implications on particle physics model building.
Audrey Degée
(University of Liège)
4/17/13, 12:19 PM
We study the implications of the global $U(1)_R$ symmetry present in
minimal lepton flavor violating implementations of the seesaw mechanism for neutrino masses. In the context of minimal type I seesaw scenarios with a slightly broken $U(1)_R$, we show that, depending on the $R$-charge assignments, two classes of generic models can be identified. Models where the right-handed neutrino masses...
Dr
Andrea De Simone
(CERN & SISSA)
4/17/13, 2:30 PM
It has been recently pointed out the great relevance of including electroweak radiation effects for indirect searches of Dark Matter. One inevitable consequence of including electroweak corrections is inducing correlations among the predicted particle fluxes targeted by the various experiments. In this talk I will focus on the correlations between different data from a single experiment:...
Lorenzo Calibbi
(ULB, Brussels)
4/17/13, 2:52 PM
Light neutralino dark matter in the MSSM is only consistent with WMAP observations in a corner of the parameter space with peculiar features,
which imply that other SUSY particles must be light, in particular the lightest stau and higgsino-like neutralinos and charginos. These states can be copiously produced at the LHC via electro-weak Drell-Yan and lead to peculiar multi-tau and missing E_T...
Paride Paradisi
(CERN)
4/17/13, 3:14 PM
We summarize the prospect of new physics searches through charm-top flavour physics in the light of the latest results at the LHC(b).
Joachim Brod
(University of Cincinnati)
4/17/13, 3:36 PM
The CDF and D0 experiments at Tevatron measure a top-quark forward-backward asymmetry significantly larger than the standard-model prediction. We construct a model which involves new strong interactions at the electroweak scale and can explain the measured asymmetry. Our model possesses a flavor symmetry which allows to evade flavor and collider constraints, while it still permits...
Dr
David Straub
(Johannes Gutenberg-Universität Mainz)
4/17/13, 4:20 PM
Models with partial compositeness, like composite Higgs models or models with a warped extra dimension, generically predict tree-level corrections to electroweak precision observables and flavour-changing neutral currents. I will discuss flavour constraints on this class of models, considering several choices for the electroweak representations and comparing flavour-symmetric models to...
Ulrich Nierste
(Karlsruhe Institute of Technology (KIT))
4/17/13, 4:42 PM
A combined fit of electroweak precision data and data on Higgs
decays lead to an exclusion of the Standard Model with a sequential
fourth generation at the level of 5 standard deviations. In my talk I
discuss the methodology of the corresponding statistical analysis, which
involved so-called non-tested hypotheses. Then I discuss a supersymmetric
GUT model, in which the atmospheric...
Andreas Crivellin
(University Bern)
4/17/13, 5:04 PM
In the first part of the talk I discuss the matching of the MSSM on the
two-Higgs-doublet model with focus on the Yukawa interactions. The
determination of the Yukawa couplings of the MSSM superpotential is
explained and the recently computed NLO corrections to quark-quark-Higgs couplings are presented.
The second part of the talk reviews the flavour phenomenology of the 2HDM with generic...
Mr
Timon Mede
(J. Stefan Institute, Ljubljana)
4/17/13, 5:26 PM
Can minimal renormalizable supersymmetric SU(5) GUT model be reconciled (up to neutrino masses) with all the phenomenological constraints like the proton decay bounds, the correct mass relations among light fermions, the recently measured Higgs mass and the LHC bounds on the sparticle spectrum, while remaining perturbative? All these experimental results confine the structure of the allowed...
Dr
Federico Mescia
(Universitat de Barcelona)
4/18/13, 9:00 AM
This year, LHC provided a very stringent bound on Br(Bs->mu+mu-), bringing it closer to the value predicted by the Standard Model (SM). Bs->mu+mu- was believed to be the golden mode at LHCb to find SUSY because a large enhancement was expected in the regime of moderate and large values of tanb. Other scenarios are still possible and a correlation with other decay channels is needed. We show...
Ana M. Teixeira
(LPC Clermont)
4/18/13, 9:22 AM
In view of the expected experimental precision, light meson leptonic decays have a unique potential to probe deviations from the Standard Model estimates on lepton flavour universality, and thus signal the presence of New Physics.
We briefly review supersymmetric contributions to the ratio $R_{K}$, which are in general unable to saturate the current experimental bounds due to a strong...
Sebastian Jaeger
(University of Sussex (GB))
4/18/13, 9:44 AM
The angular distribution in the rare decay B->V l l provides powerful probes of new physics. I present a new treatment of long-distance effects that is more conservative and robust than the prevailing procedure based on QCD factorization alone; nevertheless we find that a certain helicity hierarchy survives and implies that two observables constructed from the angular distribution remain...
Christoph Bobeth
(Technical University Munich)
4/18/13, 10:06 AM
CP asymmetries and branching ratios in QCD and QED penguin dominated charmless B --> M_1 M_2 decays can provide important constrains on non-standard effects. We use current experimental data and discuss the impact of future Belle II measurements of the systems B_(d,s) --> (K pi,K eta', K K, pi pi) and B --> (K rho, K phi, K omega, pi K^*) to explore new physics scenarios mediated by Z-penguin...
Thomas Mannel
(Siegen University)
4/18/13, 10:28 AM
I will discuss the calculation of the electric dipole moment of the neutron in the standard model, identifying contributions which have not been discussed yet. Depending on the size of the unknown hadronic matrix elements these contributions could significantly enlarge the electric dipole moment compared to the previous estimates. The impact on the search for effects beyond the standard model...
Leszek Roszkowski
(NCBJ (Warsaw))
4/18/13, 11:05 AM
Both the ATLAS and the CMS experiments have discovered a Higgs boson with mass ~126 GeV while setting new stringent lower limits on superpartner masses. The LHCb collaboration has for the first time measured BR(B_s -> mu+ mu-). I will present some implications of these results for supersymmetry and discuss ensuing prospects for SUSY searches at the LHC and in dark matter experiments.
Yosef Nir
(Weizmann Institute of Science (IL))
4/18/13, 12:11 PM
Measurements of the Yukawa couplings of the recently discovered boson $h$ to fermion pairs will provide a new arena for studying flavor physics. We analyze the lessons that can be learned by measuring the $h$ decay rates into the charged lepton pairs, $\tau^+\tau^-$, $\mu^+\mu^-$ and $\tau^\pm\mu^\mp$. We demonstrate how this set of measurements can distinguish in principle between various...
