# SUSY 2014

21-26 July 2014
Renold Building
Europe/London timezone
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# Quark Flavour Violation

## Place

Location: Renold Building
Date: from 21 Jul 14:30 to 25 Jul 18:10

## Conveners

• 21 Jul 14:30 - 15:50
• Prof. Dedes, Athanasios (University of Ioannina)
• 21 Jul 16:30 - 18:00
• Prof. Barlow, Roger (University of Huddersfield)
• 22 Jul 14:30 - 15:50
• Pospelov, Maxim
• 22 Jul 16:30 - 18:00
• Borzumati, Francesca (Tohoku University)
• 24 Jul 14:30 - 15:50
• Dr. Bettler, Marc-Olivier Bettler (Cambridge University)
• 25 Jul 14:30 - 15:50
• Prof. Buras, Andrzej (TUM)
• 25 Jul 16:30 - 18:10
• Misiak, Mikolaj (University of Warsaw)

## Timetable | Contribution List

Displaying 26 contributions out of 26
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
We investigate the consequences at low energies of a MSSM-SU(5) induced symmetry relation in the up-squark sector. We show that this relation is not too much spoiled by the RGE running down to the electroweak scale and is kept relatively model independent. Therefore, it could bring us information on the possibility that a SU(5) symmetry holds at high energies assuming that the LHC will detect squa ... More
Presented by Mr. Yannick STOLL on 25/07/2014 at 15:50
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
While the Randall-Sundrum scenario provides a solution to both the gauge and fermion hierarchy problems, stringent constraints from flavour physics and EW precision data have been shown to force the KK scale to about 20-30 TeV. This can be ameliorated, to some extent, by modifications to the background, and conversely, flavour observables can probe the geometry of the extra dimension. Of particula ... More
Presented by Mr. Andrew GRANGER on 25/07/2014 at 14:15
Type: Precision SUSY Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Constraints from Bs(d) → mu+ mu+ on the parameter spaces of beyond-SM models become more powerful with growing accuracy of the measurements and the SM calculations. I will describe the current status of the SM predictions, including the recently determined NLO EW and NNLO QCD corrections. Consequences for the 2HDM-II and the MSSM will be briefly discussed.
Presented by Mikolaj MISIAK on 21/07/2014 at 17:10
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Direct searches for New Physics particles at BABAR
Presented by Elisa GUIDO on 21/07/2014 at 13:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Rare decays of beauty and charm hadrons test the flavour structure of the underlying theory at the level of quantum corrections. They provide information on the couplings and masses of heavy virtual particles appearing as intermediate states. A review of recent results obtained by LHCb on these topics will be presented
Presented by Mr. Christian LINN on 21/07/2014 at 15:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Rare decays of beauty and charm hadrons test the flavour structure of the underlying theory at the level of quantum corrections. They provide information on the couplings and masses of heavy virtual particles appearing as intermediate states. A review of recent results obtained by LHCb on these topics will be presented.
Presented by Olivier LEROY
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
We present here the construction and phenomenology of a new model with chiral fermions, in which, some of them have exotic electric charges. We also open into this new framework, a possibility to get exotic quark interactions with a second heavy Higgs field.
Presented by Mr. Daniel CAMARGO on 25/07/2014 at 16:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
It is known that superpotential couplings between messenger sector and MSSM matter fields can significantly change phenomenology of the standard GMSB models. Those interactions not only give rise to A-terms and soft masses but also can lead to large FCNC effects. In this talk, we shall discuss examples of SU(5) unification models in which messengers couple to all generations of MSSM matter and con ... More
Presented by Dr. Tomasz JELINSKI on 22/07/2014 at 16:10
Type: Models of SUSY Session: Quark Flavour Violation
Track: Models of SUSY
LHC8 raised doubts on using naturalness as a guide in our quest for physics beyond the Standard Model. In MSSM fine tuning enters through the Higgs mass and in non-minimal extensions through the negative superpartner searches. One non-minimal theory with a less severe missing superpartner problem, is MSSM with Dirac gauginos. Dirac gauginos are also known to lead to much milder flavour violation b ... More
Presented by Dr. Pantelis TZIVELOGLOU on 24/07/2014 at 14:10
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Based on flavour symmetries only, there are two ways to give rise to an effective description of flavour physics in the quark sector close to the CKM picture: one is based on U(3)_q x U(3)_u x U(3)_d, and the other on U(2)_q x U(2)_u x U(2)_d (or equivalent symmetries). In this context we analyze the current status of flavour physics measurements and we compare their impact, in the specific case o ... More
Presented by Dr. Dario BUTTAZZO on 22/07/2014 at 15:50
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Due to large mixing in the stop sector, one up-type squark can become rather light. If the mass difference of the lightest up-type squark and the lightest neutralino is sufficiently small, both the decay of the lightest up-type squark into a top quark and the neutralino and the decay into a W boson, a bottom quark and the neutralino are kinematically suppressed. We present the calculation of the ... More
Presented by Mr. Alexander WLOTZKA on 25/07/2014 at 13:55
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
We study lightest neutral Higgs decay to a pair of charm quarks in the MSSM at full one-loop level with non-minimal quark flavour violation (QFV). The process is renormalised in the \bar{DR} scheme. In the numerical analysis we consider mixing between the second and the third squark generations and the relevantconstraints from B meson data are taken into account. It is shown that the full one-loop ... More
Presented by Dr. Elena GININA on 25/07/2014 at 15:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
We investigate the impact of direct LHC SUSY searches on the parameter space of three natural scenarios in the MSSM. In the first case the spectrum consists of light stops, sbottoms, and Higgsino-like neutralinos, while the other particles are assumed to be out of the experimental reach. In the second case we consider an additional light gluino. Finally we study a more complex spectrum compri ... More
Presented by Enrico Maria SESSOLO on 22/07/2014 at 13:50
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Pati-Salam GUTs are a first step in the direction of a complete fermion unification. We show that by a multi-step breaking of the symmetry, the mass scale of the right-handed neutrinos can be chosen near its best-fit value of ∼ 1014 GeV, while a full unification of all gauge couplings near the Planck scale is possible. In addition, Pati-Salam models provide a framework to study mechanisms g ... More
Presented by Mr. Florian HARTMANN on 24/07/2014 at 13:50
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
The Standard Model predicts that the photons emitted in flavor-­‐changing neutral current b to s gamma transitions are predominantly left-­‐handed. However, the photon polarization has never been observed in a direct measurement and remains largely une ... More
Presented by Vicente Jose RIVES MOLINA on 22/07/2014 at 13:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Radiative decays allow the measurement of the photon polarisation and thus test the left-handed couplings in weak interactions. Recent LHCb measurements have shown a non-zero polarisation. The interpretation of this result in terms of right-handed couplings requires more theoretical input. Other recent results from b&rarr;s&gamma; and c&rarr;u&gamma; transitions are also reviewed.
Presented by Olivier LEROY
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
In full one-loop generality, and under the light of the recent LHC constraints on Higgs boson mass and B-physics observables, we study, $t\to q\, h$, $q=u,c$ top-quark FCNC decay processes in the MSSM with R-parity conservation. Our results are presented assuming either degenerate or hierarchical squark flavour structure.
Presented by Prof. Athanasios DEDES on 24/07/2014 at 13:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Recent Babar results on CP violation
Presented by Prof. Roger BARLOW on 25/07/2014 at 13:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Rare B decays are an excellent laboratory for the search for physics beyond the Standard Model. In the last few years several new measurements from LHC and B-Factories experiments have been released with impressive experimental precision. In this talk, the most recent measurements of Rare B-Decays from the CMS collaboration will be reviewed. After a brief theoretical introduction, some details on ... More
Presented by Martino MARGONI on 21/07/2014 at 14:10
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Searches for BSM Physics in Rare B-Decays (CMS)
Presented by Martino MARGONI
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
Beyond Standard Model (BSM) Physics can be searched for indirectly in processes strongly suppressed in the Standard Model, e.g. in flavor-changing neutral-current processes. Results of the study with ATLAS data of the renowned rare decay, Bs -> mu+mu-, will be presented. The measurement of the angular distribution parameters in the weak decay Bd -> K*mumu is also sensitive to BSM physics. Results ... More
Presented by Iskander IBRAGIMOV on 21/07/2014 at 15:50
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
There is the two years old BaBar's hint of the disagreement with the Standard Model predictions for the branching ratios in the decays $B \to D^{(*)} \tau \nu$. We study, in the model independent way, the angular distributions that could reveal the effects which are not seen in the total decay rates. We also note some of the possible implications of the the BaBar's puzzle for the particular New Ph ... More
Presented by Ivan NISANDZIC on 22/07/2014 at 15:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
The minimal supersymmetric SU(5) grand unified theory (GUT) requires equality of down-quark and lepton Yukawa matrices at the GUT scale. Fulfilling this condition for the first two generations in the MSSM can be achieved by an appropriate choice of soft supersymmetry-breaking parameters. Either non-universal A-terms or flavour-off-diagonal squark mass matrices can generate sizeable threshold corre ... More
Presented by Mr. Mateusz ISKRZYNSKI on 25/07/2014 at 16:10
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
I will discuss the MSSM with non-minimal flavour violation in the squark sector, considering new sources of generation mixing, which are not related to the CKM matrix. After an introduction to the model, I will review the production and decay of squarks and gluinos as well as the typical signatures of such flavour-violating scenarios at the LHC, focusing on the case of additional stop-scharm mixin ... More
Presented by Björn HERRMANN on 21/07/2014 at 13:50
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
We discuss the consequences of relaxing the Minimal Flavour Violation assumption in the up-squark sector for the mass of the lightest Higgs scalar and we derive the approximate analytical formulae that quantify this effect. We show that $m_h$ can be enhanced by up to $13-14$ GeV in the case of the phenomenological MSSM with the inverted hierarchy of masses in the squark sector and zero stop m ... More
Presented by Dr. Kamila KOWALSKA on 24/07/2014 at 15:30
Type: Quark Flavour Violation: SM and Beyond Session: Quark Flavour Violation
Track: Quark Flavour Violation: SM and Beyond
An inverted mass hierarchy in the squark sector, as in so-called "natural supersymmetry", requires non-universal boundary conditions at the mediation scale of SUSY breaking. In this talk I will present a formalism to define such boundary conditions in a basis-independent manner, and apply it to natural SUSY scenarios with a high mediation scale. I will show that many generic scenarios with inverte ... More
Presented by Felix BRUEMMER on 22/07/2014 at 14:10
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