1,083 research outputs found
Electroweak Penguin B Decays at Belle
We summarise the most recent results of the Belle experiment about flavour
changing neutral current (FCNC) radiative and (semi-) leptonic B decays. In
particular, we report about the first observation of the decays B->K*l+l-,
B->phi K gamma, the inclusive B->Xs l+l-$. We also report about searches for
B->l+l- decay and for CP asymmetries in B->K*gamma.Comment: Proceeding for EPS 2003, Aachen, Germany, July 17 - 23, 200
Heavy Flavour Results at the LHC
We present a brief overview of the first flavour physics results at the LHC.
Cross-section for charm and beauty production have been measured by several
experiments and the first competitive results on D and B decays are presented.Comment: Proceedings of the XXXI Physics in Collision Conference, Vancouver,
Canada, August 28 - September 1, 201
CP violation and CKM studies (and first LHCb Run II results)
The LHC is the new b-hadron factory and will be dominating flavour physics
until the start of Belle II, and beyond in many decay modes. While the
factories and Tevatron experiments are still analysing their data, ATLAS, CMS
and LHCb are producing interesting new results in CP violation and rare decays,
that set strong constraints on models beyond that SM and exhibit some
discrepancies with the SM predictions. The LHCb collaboration used the LHC 50
ns ramp-up period of July 2015 to measure the double-differential ,
-from--hadron and charm cross-sections at TeV. Both
measurements were performed directly on triggered candidates using a reduced
data format that does not require offline processing.Comment: Proceedings of the EPS-HEP conference 2015, Vienn
CKM studies from b physics at hadron machines
In absence of direct signs of new physics at the LHC, flavour physics
provides an ideal laboratory to look for deviations from the Standard Model and
explore an energy regime beyond the LHC reach. Here, new results in CP
violation and rare decays are presented.Comment: Proceedings of the 8th International Workshop on the CKM Unitarity
Triangle (CKM 2014), Vienna, Austria, September 8-12, 2014, on behalf of the
LHCb collaboratio
Precision physics with heavy-flavoured hadrons
The understanding of flavour dynamics is one of the key aims of elementary
particle physics. The last 15 years have witnessed the triumph of the
Kobayashi-Maskawa mechanism, which describes all flavour changing transitions
of quarks in the Standard Model. This important milestone has been reached
owing to a series of experiments, in particular to those operating at the
so-called factories, at the Tevatron, and now at the LHC. We briefly review
status and perspectives of flavour physics, highlighting the results where the
LHC has given the most significant contributions, notably including the recent
observation of the decayComment: 31 pages, 10 figures in 60 Years of CERN Experiments and Discoveries,
Advanced Series on Directions in High Energy Physics 23 (2015), World
Scientific Publishin
Quantum Machine Learning for -jet charge identification
Machine Learning algorithms have played an important role in hadronic jet
classification problems. The large variety of models applied to Large Hadron
Collider data has demonstrated that there is still room for improvement. In
this context Quantum Machine Learning is a new and almost unexplored
methodology, where the intrinsic properties of quantum computation could be
used to exploit particles correlations for improving the jet classification
performance. In this paper, we present a brand new approach to identify if a
jet contains a hadron formed by a or quark at the moment of
production, based on a Variational Quantum Classifier applied to simulated data
of the LHCb experiment. Quantum models are trained and evaluated using LHCb
simulation. The jet identification performance is compared with a Deep Neural
Network model to assess which method gives the better performance
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