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b-tagging in DELPHI at LEP

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TLDR
The standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail and various discriminating variables used for the tagging and the procedure of their combination are described.
Abstract
The standard method used for tagging b-hadrons in the DELPHI experiment at the CERN LEP Collider is discussed in detail. The main ingredient of b-tagging is the impact parameters of tracks, which relies mostly on the vertex detector. Additional information, such as the mass of particles associated to a secondary vertex, significantly improves the selection efficiency and the background suppression. The paper describes various discriminating variables used for the tagging and the procedure of their combination. In addition, applications of b-tagging to some physics analyses, which depend crucially on the performance and reliability of b-tagging, are described briefly.

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Journal ArticleDOI

Precision electroweak measurements on the Z resonance

TL;DR: In this paper, the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP are reported.
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Search for the rare decay Bs 0→μ+μ-

V. M. Abazov, +454 more
- 18 Oct 2010 - 
TL;DR: In this paper, the authors present the results of a search for the flavor changing neutral current decay B-s(0) -> mu(+)mu(-) using 6.1 fb(-1) of p (p) over bar collisions at root s = 1.96 TeV collected by the D0 experiment at the Fermilab Tevatron Collider.
Journal ArticleDOI

Searches for Neutral Higgs Bosons in Extended Models

Jalal Abdallah, +370 more
TL;DR: In this paper, searches for neutral Higgs bosons produced at LEP in association with Z bosons, in pairs and in the Yukawa process are presented, and results are presented in the form of mass-dependent upper bounds on coupling factors (in units of model independent reference cross-sections) for all processes, allowing interpretation of the data in a large class of models.
Journal ArticleDOI

Search for charged Higgs bosons at LEP in general two Higgs doublet models

TL;DR: A search for pair-produced charged Higgs bosons was performed in the DELPHI detector at LEP II at centre-of-mass energies from 189 GeV to 209 GeV as discussed by the authors.
Journal ArticleDOI

LCFIPlus: A framework for jet analysis in linear collider studies

TL;DR: In this article, the authors report on the progress in flavor identification tools developed for a future e + e − linear collider such as the International Linear Collider and Compact Linear Collider (CLIC).
References
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Book

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TL;DR: In this article, the multivariate normal distribution is used for principal component analysis and multivariate analysis of covariance and related topics, as well as multi-dimensional scaling and cluster analysis.
Journal ArticleDOI

Better jet clustering algorithms

TL;DR: In this article, modifications to the k⊥-clustering jet algorithm were investigated, which preserve the advantages of the original Durham algorithm while reducing nonperturbative corrections and providing better resolution of jet substructure.
Journal ArticleDOI

New clustering algorithm for multijet cross sections in e+e− annihilation

TL;DR: In this paper, a new clustering algorithm was proposed to predict the jet cross sections at small y cut for arbitrary n. This algorithm can be used to compute the leading and next-to-leading logarithm of y cut to all orders in QCD perturbation theory.

Introduction to multivariate analysis

TL;DR: Dr Dunteman clarifies advanced concepts for both students and researchers in an intuitive, non-rigorous manner, and every technique is illustrated (step-by-step) on small, hypothetical, yet meaningful social science data bases.
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