This paper describes the ATLAS experiment as installed in i ts experimental cavern at point 1 at CERN. It also presents a brief overview of the expec ted performance of the detector.

http://absimage.aps.org/image/SES08/MWS_SES08-2008-020010.pdf

The ATLAS Experiment at the CERN Large Hadron Collider

We present a preliminary set of updated NLO parton distributions. For the first time we have a quantitative extraction of the strange quark and antiquark distributions and their uncertainties determined from CCFR and NuTeV dimuon cross sections. Additional jet data from HERA and the Tevatron improve our gluon extraction. Lepton asymmetry data and neutrino structure functions improve the flavour separation, particularly constraining the down quark valence distribution.

pdf/parton-distributions-for-the-lhc-3jcnh64voi.pdf

Parton distributions for the LHC

ALICE is a general-purpose heavy-ion detector designed to study the physics of strongly interacting matter and the quark-gluon plasma in nucleus-nucleus collisions at the LHC at a center of mass energy of 5.5 TeV/nucleon. It is currently under construction and will be ready for data taking at LHC turn-on in 2007. The collaboration currently includes more than 900 physicists, both from nuclear physics and high-energy physics, from over 70 institutions in 27 countries.

/pdf/the-alice-experiment-at-the-cern-lhc-4x8sjsfocd.pdf

The alice experiment at the CERN LHC

The tt production cross section (σ_(tt)) is measured in proton-proton collisions at s√= 7 TeV in data collected by the CMS experiment, corresponding to an integrated luminosity of 2.3 fb^(−1). The measurement is performed in events with two leptons (electrons or muons) in the final state, at least two jets identified as jets originating from b quarks, and the presence of an imbalance in transverse momentum. The measured value of σ_(tt) for a top-quark mass of 172.5 GeV is 61.9±2.5(stat.)^(+5.1)_(−5.0)(syst.)±3.6(lumi.)pb , consistent with the prediction of the standard model.

/pdf/measurement-of-the-tt-production-cross-section-in-558gazzzca.pdf

Measurement of the tt production cross section in thedilepton channel in pp collisions at √s = 7 TeV

This book should be at the side of every particle and nuclear physics graduate student and professional. Journeys Beyond the Standard Model starts with a detailed and modern account of the Standard Model of elementary particle physics, the paradigm of particle physics for the last twenty years. Its timely release coincides with the recent dramatic discovery that the neutrino has a finite mass, which is the first indication that the Standard Model is an incomplete description of fundamental physics at short distances. This book presents in detail three possible generalizations of the Standard Model: its extension to accommodate neutrino masses; its extension to avoid CP violation in the strong interactions by introducing a new particle, the axion; and finally, its generalization to low-energy supersymmetry, which provides a link between the standard model and Einstein's theory of general relativity.This graduate text complements the author's previous book, Modern Field Theory: A Primer, which focuses on the methodology of particle physics. Its aim is to give students and professional physicists alike a thorough understanding of the phenomena described by the Standard Model, while keeping track of the most recent and cutting-edge principles of elementary particle physics.

https://physicstoday.scitation.org/doi/pdf/10.1063/1.1349615

Journeys beyond the standard model

This thesis presents a study of the scalar sector in the standard model (SM), as well asdiﬀerent searches for an extended scalar sector in theories beyond the standard model(BSM). All analyses have in common the fact that at least one scalar boson decays to apair of tau leptons. The results exploit the data collected by the CMS detector duringLHC Run-1, in proton-proton collisions with a center-of-mass energy of 7 or 8 TeV.The particle discovered in 2012, H, looks compatible with a SM Brout-Englert-Higgsboson, but this statement is driven by the H → γγ and H → ZZ decay modes. TheH → τ + τ − decay mode is the most sensitive fermionic decay channel, and allows to testthe Yukawa couplings of the new particle. The search for the SM scalar boson decaying totau leptons, and produced in association with a massive vector boson W or Z, is describedin this thesis. Even though a good background rejection can be achieved by selecting theleptons originating from the vector boson, Run-1 data are not sensitive to the small production cross sections predicted in the SM for the scalar boson. The combination withthe gluon-gluon fusion and vector boson fusion production searches leads to an evidencefor the decay of the H boson to tau leptons.Many BSM models, such as the minimal supersymmetric SM (MSSM) or models withtwo scalar doublets (2HDM), predict the existence of several scalar bosons. The decaysof these bosons to tau leptons can be enhanced in some scenarios depending on the modelparameters, which makes the di-tau decay mode powerful to discover BSM physics. Foursearches for an extended scalar sector are detailed in this thesis. The ﬁrst analysis searchesfor a pseudoscalar boson with a mass between 220 and 350 GeV, decaying to an SM-likescalar boson and a Z boson, in the ﬁnal state with two light leptons and two tau leptons.Second, a search for the exotic decay of the new particle H to a pair of light pseudoscalarbosons, which is still allowed by all measurements made up to now, in the ﬁnal state withtwo muons and two tau leptons is performed. Third, a mass region almost never exploredat the LHC is probed by the search of a light pseudoscalar, with a mass between 25 and80 GeV, decaying to tau leptons and produced in association with b quarks. The lastanalysis describes the search for a heavy resonance in the MSSM, decaying to a pair oftau leptons. None of these analyses has found any hint of new physics beyond the SM,but stringent limits on the cross section of such signals could be set.

Scalar Boson Decays to Tau Leptons: in the Standard Model and Beyond

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Cecile Caillol

Author Tools

Chat about Author

Papers

Scalar Boson Decays to Tau Leptons: in the Standard Model and Beyond