The Search for Physics Beyond the Standard Model in the $B \bar{B}$ Spectrum Observed in Tevatron $p\bar{p}$ Collisions

The Search for Physics Beyond the Standard Model in the $B \bar{B}$ Spectrum Observed in Tevatron $p\bar{p}$ Collisions

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Published: 1998

Total Pages: 160

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Many extensions have been proposed to the Standard Model of fundamental particles and interactions, therefore we have conducted a general search with the Collider Detector at Fermilab (CDF) for particles which would be expected to appear as a resonance in the b$\bar{b}$ mass spectrum produced in proton-antiproton collisions at a center-of-mass energy of √s = 1.8 TeV at the Fermilab Tevatron collider.


Beyond the Standard Model at Tevatron

Beyond the Standard Model at Tevatron

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Published: 2000

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This article presents recent results of searches for physics beyond the Standard Model using the CDF and the D0 detector at the Fermilab Tevatron Collider. All results shown correspond to analysis performed using the past 1992--1996 Fermilab Tevatron run 1 data (roughly 100 pb−1 per each experiment). In particular, the authors describe recent Tevatron searches for scalar top in the b + l + missing-E{sub T} channel, for squark and gluinos using like-sign dileptons (LS), for large extra space-time dimensions and the search for leptoquarks and technicolor in the missing-E{sub T}+heavy flavor jet events. Tight limits on the existence of such models have been set.


Searches for Physics Beyond the Standard Model in Ttbar Events

Searches for Physics Beyond the Standard Model in Ttbar Events

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Published: 2004

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The top quark is currently only observed at the Tevatron, where it is mainly produced in t{bar t} pairs. Due to the very high mass of the top quark compared to the other quarks and the gauge bosons, it is expected to play a special role in electroweak symmetry breaking. Therefore it might be especially sensitive to new physics. Measurements of various production and decay quantities of the top quark could lead to discoveries of physics beyond the standard model. Several such measurements were performed by the CDF collaboration during Run1 of the Tevatron. These measurements and first results from CDF in Run2 are presented.


Beyond the Standard Model Physics Searches at the Tevatron

Beyond the Standard Model Physics Searches at the Tevatron

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Published: 2008

Total Pages: 9

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The recent results on a number of searches performed at Tevatron for new phenomena beyond Standard Model are presented. The topics include the experimental tests of SUSY with mSUGRA and GMSB breaking scenarios. The latest analyses on large extra dimensions, new massive bosons are covered as well. The results are based on experimental data samples collected at the Tevatron with CDF and DO detectors and comprising a total integrated luminosity up to (almost equal to) 2.7 fb−1.


Searches for New Physics at the Tevatron

Searches for New Physics at the Tevatron

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Published: 2011

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The Tevatron collider has provided the CDF and D0 experiences with large datasets as input to a rich program of searches for physics beyond the standard model. The results presented here are a partial survey of recent searches conducted by the two collaborations using up to 6 fb−1 of data. The standard model (SM) of particles, despite its remarkable description of experimental data at the elementary particle level, has some deficiencies to explain what is observed in the universe: lack of anti-matter, existence of dark matter, etc. Working at the energy frontier, as was the case at the Tevatron for so many years, gives experimentalists the hope to discover new non-SM particles which would indicate some direction to follow at explaining these SM deficiencies. Over the years, the CDF and D0 experiments have gained experience in the detector responses to all particle types. It allows to look at a large number of different final states searching for deviations from the SM expectations. As the knowledge of detector particle responses becomes more accurate, the complexity of final states can increase. For a given final state signature, the non-observation of deviations from the SM prediction allows to constrain several models at once.


New Physics In B Decays

New Physics In B Decays

Author: Sheldon Stone

Publisher: World Scientific

Published: 2022-04-07

Total Pages: 232

ISBN-13: 9811251312

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The Standard Model (SM) of particle physics has withstood thus far every attempt by experimentalists to show that it does not describe data. We discuss the SM in some detail, focusing on the mechanism of fermion mixing, which represents one of its most intriguing aspects. We discuss how this mechanism can be tested in b-quark decays, and how b decays can be used to extract information on physics beyond the SM. We review experimental techniques in b physics, focusing on recent results and highlighting future prospects. Particular attention is devoted to recent results from b decays into a hadron, a lepton and an anti-lepton, that show discrepancies with the SM predictions — the so-called B-physics anomalies — whose statistical significance has been increasing steadily. We discuss these experiments in a detailed manner, and also provide theoretical interpretation of these results in terms of physics beyond the SM.


Search for New Physics Beyond the Standard Model at BaBar

Search for New Physics Beyond the Standard Model at BaBar

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Published: 2008

Total Pages: 4

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A review of selected recent BaBar results are presented that illustrate the ability of the experiment to search for physics beyond the standard model. The decays B → [tau][nu] and B → s[gamma] provide constraints on the mass of a charged Higgs. Searches for Lepton Flavour Violation could provide a clear signal for beyond the standard model physics. Babar does not observe any signal for New Physics with the current dataset.