21-26 July 2014
Renold Building
Europe/London timezone
Lepton Flavour Violation and Neutrinos
Place
Location: Renold Building
Date:
from 21 Jul 14:30 to 25 Jul 18:30
Conveners
-
21 Jul 14:30 - 15:50
- Dr. Deppisch, Frank (University College London)
-
21 Jul 16:30 - 18:00
- Paes, Heinrich
-
22 Jul 14:30 - 15:50
- Dr. Niro, Viviana (University of Barcelona)
-
22 Jul 16:30 - 18:15
- Dr. Mitra, Manimala (Postdoctoral fellow, IPPP, Durham University)
-
24 Jul 14:30 - 15:50
- Dr. Huang, Wei-Chih (University College London)
-
25 Jul 14:30 - 15:50
- Dr. Dev, Bhupal (University of Manchester)
-
25 Jul 16:30 - 18:30
- Dr. Evans, Justin (University of Manchester)
Timetable | Contribution List
Displaying 30
contributions
out of
30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
The search for sterile neutrinos is motivated by the LSND and MiniBooNE, reactor and Gallium anomalies. The fact that this evidence is partly conflicting can be a consequence of either experimental systematics or of non-standard neutrino properties. A particular interesting case for such non-standard properties are scenarios where the simple dispersion relation between energy and momentum is chang
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Presented by Prof. Heinrich PäS
on
21/07/2014
at
14:30
We identify a weak line at 3.5 keV in X-ray spectra of the Andromeda galaxy and Perseus galaxy cluster using deep exposures from the XMM-Newton Telescope Science Archive. The detection of this signal is presented, along with evidence that it can not concern a previously unknown systematic. The possibility is discussed that the signal originates from the decay of dark matter particles rather than a
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Presented by Mr. Jeroen FRANSE
on
21/07/2014
at
17:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
In the context of the type-I seesaw mechanism, when there is an underlying discrete flavor symmetry, such as $\mu-\tau$ symmetry, at work, $\theta_{13}$ in the active neutrino mixing matrix is zero and leptogenesis can not be realized since there are no complex phases in the heavy-light neutrino mixing. In this work, we demonstrate that the existence of dark matter, which violates the flavor symme
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Presented by Wei-Chih HUANG
on
21/07/2014
at
15:50
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
Generalised CP transformations are the only known framework which allows to predict Majorana phases in a flavour model purely from symmetry. For the first time generalised CP transformations are investigated for an infinite series of finite groups, $\Delta(6n^2)=(Z_n\times Z_n)\rtimes S_3$. In direct models the mixing angles and Dirac CP phase are solely predicted from symmetry. $\Delta(6n^2)$ fla
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Presented by Mr. Thomas NEDER
on
22/07/2014
at
15:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
Heavy neutral leptons are attractive candidates for the extension of the
Standard Model, since they can explain the physical origin of the three
major observable BSM phenomena (Neutrino oscillations, Baryon asymmetry of
the Universe, and Dark matter) in framework of one model, where the number
of new free parameters is quite small. I will review the role of the new
particles in cosmology, the
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Presented by Mr. Artem IVASHKO
on
25/07/2014
at
15:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
In this talk we discuss the possibility that IceCube high energy neutrino events can be understood by a power law spectrum produced by astrophysical sources as well as by the decay spectrum of long-lived particles. We study the possibility of distinguishing these scenarios with current IceCube data and in the future as more data is accumulated. In particular, we study the circumstances under which
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Presented by Dr. Chee Sheng FONG
on
21/07/2014
at
14:50
LBNE (Long-Baseline Neutrino Experiment) is an accelerator-based neutrino oscillation experiment. LBNE will produce a muon-neutrino beam using protons from Fermilab's Main Injector and will detect electron-neutrino appearance and muon-neutrino disappearance using a Liquid Argon TPC located at a distance of 1300 km at Sanford Underground Research Facility in South Dakota. The primary physics motiva
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Presented by Dr. Justin EVANS
on
25/07/2014
at
15:50
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
Lepton flavor violating processes of charged particles (CLFV) are forbidden in the standard
model of elementary particle physics. The muon rare decay $\mu \rightarrow e\gamma$
is a CLFV process and has never been observed significantly.
On the other hand, in many new theories beyond the standard model,
for example supersymmetric grand unification models, the branching
ratio of $\mu \rightarro
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Presented by Dr. Ryu SAWADA
on
25/07/2014
at
14:10
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
I give a short summary if the implications of non abelian discrete flavor symmetry for lepton flavor violation processes. In particular I focus on the possibility to distinguish flavor symmetries by means of LFV.
Presented by Dr. Stefano MORISI
on
24/07/2014
at
13:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
We present a phenomenological study of the implications on charged
lepton flavor violating (LFV) processes from slepton flavor mixing
within the Minimal Supersymmetric Standard Model. We work under the
model-independent hypothesis of general flavor mixing in the slepton
sector, being parametrized by a complete set of dimensionless δABij
(A,B = L,R; i,j = 1, 2, 3) parameters. The present uppe
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Presented by Dr. Miguel ARANA-CATANIA
on
25/07/2014
at
16:50
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
We point out that lepton number violation is possible even if neutrinos are of Dirac type, and construct a simple renormalizable model that leads to $\Delta L = 4$. We identify the signature low-energy decay of this new framework as neutrinoless quadruple beta decay and present potential candidate isotopes. In addition, an accompanying leptogenesis mechanism will be discussed that differs qualitat
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Presented by Mr. Julian HEECK
on
22/07/2014
at
15:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
The analysis of the leptonic lepton flavour violation (LFV) processes and lepton dipole moments in low
scale seesaw models of minimally extended minimal supergravity (SUGRA) is presented. Minimal extension of the
minimal SUGRA framework for MSSM is achieved adding a CP violating phase only in the soft SUSY breking trilinear
couplings for right sneutrinos, $A_\nu$. For the LFV processes two new
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Presented by Prof. Amon ILAKOVAC
on
25/07/2014
at
16:10
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
In previous works (JHEP03(2012)100, JHEP09(2012)015), we have highlighted that the Higgs and Z-mediated penguin diagrams contributing to lepton flavour violating (LFV) observables like tau->3mu are strongly enhanced in the supersymmetric inverse seesaw model. It has recently been pointed out that an error in the literature for the Z-penguins form factors would lead to a non-physical non-decoupling
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Presented by Dr. Cedric WEILAND
on
25/07/2014
at
13:50
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
We discuss how two birds---the little hierarchy problem of low-scale type-I seesaw models and the search for a viable dark matter candidate---are killed by one stone: a new inert scalar state
Presented by Marco FABBRICHESI
on
21/07/2014
at
14:10
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
We study the generation of neutrino masses and mixing in supersymmetric R-parity violating models containing two pairs of Higgs doublets. In these models, new RPV terms HHE arise in the superpotential, as well as new soft terms. Such terms give new contributions to neutrino masses. We identify the different parameters and suppression/enhancement factors that control each of these contributions, an
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Presented by Ms. Clara PESET
on
22/07/2014
at
16:10
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
I will concentrate on the link between leptogenesis and low-energy neutrino data, showing how the baryon asymmetry of the Universe can constrain a type- I seesaw model and yield interesting predictions on the neutrino parameters. To this aim, I will consider the conditions required by strong thermal leptogenesis, where the final asymmetry is fully independent of the initial conditions. In this fra
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Presented by Mr. Michele RE FIORENTIN
on
22/07/2014
at
16:50
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
Neutrinoless double beta decay is a lepton number violating process which allows to investigate the
Dirac or Majorana nature of neutrinos and to indirectly estimate their absolute mass. At present,
several experiments based on different experimental techniques are searching for this rare decay.
In this talk a review of the most relevant current and upcoming experiments is given and the comparis
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Presented by Dr. Carla MACOLINO
on
24/07/2014
at
13:50
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
We discuss a new production mechanism for heavy neutrinos at the LHC, which is infrared-enhanced by t-channel W-photon fusion processes, and dominates over the usually considered s-channel W-exchange
diagram for heavy-neutrino masses larger than 100-200 GeV. This has important implications for the ongoing heavy neutrino searches at the LHC, complementary to their low-energy Lepton Flavor Violati
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Presented by Dr. Bhupal DEV
on
22/07/2014
at
14:50
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
The observation of neutrino oscillations has re-opened the case for searches of lepton-flavour violating decays. We report on recent results and prospects on lepton-flavour violating τ decays, as well as searches for short or long-lived Majorana heavy neutrinos in B→μμπ decays.
Presented by Dr. Murilo RANGEL
on
21/07/2014
at
16:10
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
Recent results and prospects for precision tests of the Standard Model in kaon decay in flight experiments at CERN are presented. A measurement of the ratio of leptonic decay rates of the charged kaon at a 0.4% precision constrains the parameter space of new physics models with extended Higgs sector, a fourth generation of quarks and leptons or sterile neutrinos.
Searches for heavy neutrino mass
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Presented by Dr. Mauro PICCINI
on
25/07/2014
at
16:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
Neutrinoless double beta decay is a Lepton Number Violating decay, the observation of which would answer one of the remaining questions of the Standard Model: the Dirac or Majorana nature of the neutrino. The search can also constrain Beyond the Standard Model processes which could mediate this decay. The SuperNEMO experiment, currently under construction, will have a neutrino mass sensitivity dow
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Presented by Pawel GUZOWSKI
on
24/07/2014
at
14:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
The reactor anti-neutrino experiments; Daya Bay, Double Chooz and RENO, have been incredibly successful. Since the first hint of theta_13 in 2011, which was larger than expected, the value of sin^2(2theta_13) has been now measured by the three experiments to be 0.084 +/- 0.005, 0.09 +/-0.03 and 0.101 + 0.013 respectively.
I will describe the experiments, highlighting the main differences between
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Presented by Dr. Jaime DAWSON
on
21/07/2014
at
15:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
Recent neutrino oscillation results from the MINOS and T2K collaborations will be reviewed, including their latest muon neutrino disappearance, electron neutrino appearance and combined disappearance/appearance measurements. The new constraints that these experiments impose on the neutrino mixing parameters will be discussed and the prospects for future improvements will be briefly outlined.
Presented by Prof. Peter RATOFF
on
21/07/2014
at
14:30
e implement the Witten’s loop mechanism for the right-handed Majorana neutrino mass generation within the framework of the non-SUSY unification based on $SU(5)\times U(1)$ gauge group -- so called flipped SU(5). Since in this model the mass matrices of up-type quarks and Dirac neutrinos differ only by transposition, the mixing matrix relevant for proton decay computation is closely related to le
... More
Presented by Mrs. Helena KOLESOVA
on
22/07/2014
at
16:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
MINOS is a long-baseline neutrino oscillation experiment operated at the Fermi Laboratory, USA. The experiment is situated along the central axis of the NuMI accelerator neutrino beam, and comprises two kiloton-scale steel-scintillator detectors, located 1km and 735km downstream of the beam target. Since its start-up in 2005, the NuMI beam facility has delivered in excess of 15e20 protons-on-targe
... More
Presented by Dr. ANDREW BLAKE
on
22/07/2014
at
14:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
The discovery of neutrino oscillations suggests the existence of right-handed neutrinos. LHC can probe right-handed heavy neutrino masses inaccessible to previous direct and indirect searches. In particular, models predicting Majorana neutrinos can result in striking experimental signatures of like-sign lepton pairs with two additional high transverse momentum jets. In this talk, we present the r
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Presented by Prof. Un-ki YANG
on
22/07/2014
at
15:10
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
The COMET (Coherent Muon-to-Electron Transition) experiment is seeking
to measure the neutrinoless, coherent transition of a muon to an electron in
the field of an aluminum nucleus with a single event sensitivity below 10-16.
The experiment utilizes a 8GeV proton beam provided at J-PARC (Japan
Proton Accelerator Research Complex); and takes a staged approach to reach
the final goal. The 1st s
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Presented by Prof. Satoshi MIHARA
on
25/07/2014
at
14:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
In light of recent experimental results, we carefully analyze the effects of interference in neutrinoless double beta decay, when more than one mechanism is operative. If a complete cancellation is at work, the half-life of the corresponding isotope is infinite and any constraint on it will automatically be satisfied. We analyze this possibility in detail assuming a cancellation in 136-Xe, and fin
... More
Presented by Dr. Manimala MITRA
on
24/07/2014
at
14:10
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
The anomalous magnetic dipole moment of the muon can be both measured and computed to very high precision, making it a powerful probe to test the standard model and search for new physics such as SUSY. The previous measurement by the Brookhaven E821 experiment found a 3.6 standard deviation discrepancy from the predicted value. The new g-2 experiment at Fermilab will improve the precision by a fac
... More
Presented by Prof. Samuel HENRY
on
25/07/2014
at
15:30
Type: Lepton Flavour Violation and Neutrinos
Session:
Lepton Flavour Violation and Neutrinos
Track: Lepton Flavour Violation and Neutrinos
Sterile neutrinos of keV scale are a well motivated candidate for Warm Dark Matter. I'll review the cosmological and astrophysical implications of keV sterile neutrinos. Then, I'll discuss the current models present in the literature, that are able to explain a sterile mass pattern with one neutrino at the keV scale and the other two considerably heavier. Finally, I'll present a new production mec
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Presented by Dr. Viviana NIRO
on
22/07/2014
at
15:50