RECENT RESULTS FROM THE LHCb EXPERIMENT

2012 ◽  
Vol 27 (30) ◽  
pp. 1230031
Author(s):  
◽  
PIERLUIGI CAMPANA ◽  
GAIA LANFRANCHI
Keyword(s):  
Cp Violation ◽  
New Physics ◽  
B Decays ◽  
Lhcb Experiment ◽  
Rare B Decays ◽  
Electroweak Physics ◽  
Integrated Luminosity

We present a review of the operation and of the most recent results from the LHCb experiment at the LHC collider, based on the analyses performed using the data collected in 2010 and 2011, which correspond to an integrated luminosity of ~ 1 fb-1. These measurements set stringent new limits on the contributions of New Physics processes in the field of rare b decays, and in the search for CP violation in B0 and [Formula: see text] mesons decays. In addition, a summary of results from studies of CP violation in the charm sector are presented, together with measurements in quarkonia production, in spectroscopy, in electroweak physics and in searches for exotica. The planned upgrade of LHCb is also briefly discussed.

scholarly journals CP VIOLATION AND BEAUTY DECAYS — A CASE STUDY OF HIGH IMPACT, HIGH SENSITIVITY AND EVEN HIGH PRECISION PHYSICS

2000 ◽  
Vol 15 (08) ◽  
pp. 1079-1156
Author(s):  
I. I. BIGI
Keyword(s):  
Cp Violation ◽  
Degrees Of Freedom ◽  
High Energy Physics ◽  
Dipole Moments ◽  
High Sensitivity ◽  
High Energy ◽  
New Physics ◽  
B Decays ◽  
New Paradigm ◽  
Parametric Reliability

The narrative of these lectures contains three main threads: (i) CP violation despite having so far been observed only in the decays of neutral kaons has been recognized as a phenomenon of truly fundamental importance. The KM ansatz constitutes the minimal implementation of CP violation: without requiring unknown degrees of freedom it can reproduce the known CP phenomenology in a nontrivial way. (ii) The physics of beauty hadrons — in particular their weak decays — opens a novel window onto fundamental dynamics: they usher in a new quark family (presumably the last one); they allow us to determine fundamental quantities of the Standard Model like the b quark mass and the CKM parameters V(cb), V(ub), V(ts) and V(td); they exhibit speedy or even rapid [Formula: see text] oscillations. (iii) Heavy Quark Expansions allow us to treat B decays with an accuracy that would not have been thought possible a mere decade ago. These three threads are joined together in the following manner: (a) Huge CP asymmetries are predicted in B decays, which represents a decisive test of the KM paradigm for CP violation. (b) Some of these predictions are made with high parametric reliability, which (c) can be translated into numerical precision through the judicious employment of novel theoretical technologies. (d) Beauty decays thus provide us with a rich and promising field to search for New Physics and even study some of its salient features. At the end of it there might quite possibly be a New Paradigm for High Energy Physics. There will be some other threads woven into this tapestry: electric dipole moments, and CP violation in other strange and in charm decays.

scholarly journals Search for new physics in rare B decays

2000 ◽  
Vol 476 (3-4) ◽  
pp. 233-242 ◽  
Author(s):  
G. Abbiendi ◽  
K. Ackerstaff ◽  
P.F. Akesson ◽  
G. Alexander ◽  
J. Allison ◽  
...  
Keyword(s):  
New Physics ◽  
B Decays ◽  
Rare B Decays

RARE B AND τ DECAYS AND SEARCHES FOR NEW PHYSICS

2007 ◽  
Vol 22 (30) ◽  
pp. 5433-5442
Author(s):  
R. J. BARLOW
Keyword(s):  
Cp Violation ◽  
Standard Model ◽  
Excellent Agreement ◽  
Rare Decays ◽  
B Mesons ◽  
New Physics ◽  
B Decays ◽  
The Standard Model ◽  
Model Predictions ◽  
Vector Particles

New results on rare decays of B mesons and τ leptons are summarised. Measurement are generally in excellent agreement with the Standard Model predictions, the only exceptions being the polarisation of vector particles in B decays and the non-appearance of CP violation in B ± → K ±π0.

scholarly journals Effects of new physics on CP violation in B decays

2003 ◽  
Vol 33 (S1) ◽  
pp. s346-s348
Author(s):  
George W.S. Hou
Keyword(s):  
Cp Violation ◽  
New Physics ◽  
B Decays

The constraints on new physics from b → s transitions

2016 ◽  
Vol 31 (29) ◽  
pp. 1650164
Author(s):  
Zhao-Feng Ge ◽  
Tai-Fu Feng ◽  
Hai-Bin Zhang
Keyword(s):  
Experimental Data ◽  
Parameter Space ◽  
New Physics ◽  
B Decays ◽  
Global Fit ◽  
Rare B Decays

Assuming that the corrections to relevant Wilson coefficients from new physics (NP) contain the possible CP phases, we analyze the constraints on the NP corrections from the updated experimental data on rare B decays from LHCb, BABAR, and BELLE, etc. systematically. Through global fit among the theoretical evaluations and corresponding experimental observations, we find that the possible CP phases of the corrections to relevant Wilson coefficients from NP affect the allowed parameter space obviously.

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