![Search for a Light Higgs Boson in the Channel WH-] E Nu_e B Anti-b PDF](https://books.google.com/books/content/images/frontcover/ujPiDAEACAAJ?fife=w150-h200)
Author: David Meder-MarouelliPublisher:
ISBN:
Category :
Languages : en
Pages : 101
Book Description
Search for a Light Higgs Boson in the Channel WH-] E Nu_e B Anti-b
![Search for a Light Higgs Boson in the Channel WH-] E Nu_e B Anti-b PDF](https://books.google.com/books/content/images/frontcover/ujPiDAEACAAJ?fife=w80-h100)
Author: David Meder-MarouelliPublisher:
ISBN:
Category :
Languages : en
Pages : 101
Book Description
Search for a Light Higgs Boson in the Channel WH{u2192} E?e B$\bar{b}$ in P$\bar{p}$-collision with $\sqrt{s}$
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 101
Book Description
Although the standard model of particle physics has been very successfull in describing nature it needs to be extended by the Higgs mechanism to explain the particle masses observed in experiments. This mechanism introduces a new elementary particle called the Higgs boson. Current research at particle accelerators focuses on the search for the Higgs boson as a major goal. This analysis uses the data recorded with the D0-detector of the Tevatron at the Fermi National Accelerator Laboratory (FNAL). The Tevatron collides protons and antiprotons at a center of mass energy of √s=1.96 TeV. The primary goal of the analysis was the search for a light Higgs boson in the WH channel. For this the process pp→ WH → ev bb was used. Furthermore a measurement of the Wbb production cross section has been performed. For the measurements a total intagrated luminosity of L=255pb-1 was available. For the selection of the desired processes events with electrons, missing transverse momentum and at least two jets have been used. At least two of the jets were required to be identified as b-jets. To obtain an efficient event selection many event properties had to be calculated and methods to cut on them needed to be optimized. Based on the selected events the Wbb production cross section has been calculated. After includinng the branching ratio BR(W→ev)=0.108 the result is ?(Wbb)=21.8 pb (+15.5; -20.0 pb(sys+stat)) for events where the b-quarks satisfy p_T>8 GeV und.
Search for Non-SM Light Higgs Boson in the H [arrow] Γγ Channel
![Search for Non-SM Light Higgs Boson in the H [arrow] Γγ Channel PDF](https://books.google.com/books/content/images/frontcover/kLY9zwEACAAJ?fife=w80-h100)
Author: Alexander Stepanovych MelnitchoukPublisher:
ISBN:
Category : Higgs bosons
Languages : en
Pages : 358
Book Description
The Search for a Light Higgs Boson in the TtH0(H0u8594?- Gg) -- Channel and Measurement of Its CP-Parity with the ATLAS Experiment at the Large Hadron Collider
Author: A New LHC Search Channel for a Light Higgs Boson and Associated QCD Calculations
Author: Mathieu RubinSearch for the Higgs Boson
Author: John V. LeePublisher: Nova Publishers
ISBN: 9781594548611
Category : Science
Languages : en
Pages : 158
Book Description
The Higgs boson is an undiscovered elementary particle, thought to be a vital piece of the closely fitting jigsaw of particle physics. Like all particles, it has wave properties akin to those ripples on the surface of a pond which has been disturbed; indeed, only when the ripples travel as a well defined group is it sensible to speak of a particle at all. In quantum language the analogue of the water surface which carries the waves is called a field. Each type of particle has its own corresponding field. The Higgs field is a particularly simple one -- it has the same properties viewed from every direction, and in important respects in indistinguishable from empty space. Thus physicists conceive of the Higgs field being "switched on", pervading all of space and endowing it with "grain" like that of a plank of wood. The direction of the grain in undetectable, and only becomes important once the Higgs' interactions with other particles are taken into account. for instance, particles call vector bosons can travel with the grain, in which case they move easily for large distances and may be observed as photons - that is, particles of light that we can see or record using a camera; or against, in which case their effective range is much shorter, and we call them W or Z particles. These play a central role in the physics of nuclear reactions, such as those occurring in the core of the sun. The Higgs field enables us to view these apparently unrelated phenomenon as two sides of the same coin; both may be described in terms of the properties of the same vector bosons. When particles of matter such as electrons or quarks (elementary constituents of protons and neutrons, which in turn constitute the atomic nucleus) travel through the grain, they are constantly flipped "head-over-heels". this forces them to move more slowly than their natural speed, that of light, by making them heavy.
Search for a Light Charged Higgs Boson in the Decay Channel H + --> C ̄s Using the ATLAS Detector
Author: Omran TrifisThe Search and Discovery of the Higgs Boson
Author: Luis Roberto Flores CastilloPublisher: Morgan & Claypool Publishers
ISBN: 1681741423
Category : Science
Languages : en
Pages : 104
Book Description
This book provides a general description of the search for and discovery of the Higgs boson (particle) at CERN’s Large Hadron Collider. The goal is to provide a relatively brief overview of the issues, instruments and techniques relevant for this search; written by a physicist who was directly involved. The Higgs boson mat be the one particle that was studied the most before its discovery and the story from postulation in 1964 to detection in 2012 is a fascinating one. The story is told here while detailing the fundamentals of particle physics.
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Author: Marin MersenneThe Beauty and the Boost: A Higgs Boson Tale
Author: Brian MoserPublisher: Springer Nature
ISBN: 3031394429
Category : Science
Languages : en
Pages : 250
Book Description
Precision measurements of the Higgs boson’s properties are a powerful tool to look for deviations from the predictions of the Standard Model (SM) of particle physics. The 139/fb of proton-proton collision data which have been collected by the ATLAS experiment during Run 2 of the LHC, offer an opportunity to investigate rare Higgs-boson topologies, which are particularly sensitive to new physics scenarios but experimentally difficult to access. Several such measurements, which target Higgs-boson decays to heavy-flavour quarks, as well as their combinations are presented in this thesis. A novel analysis that measures Higgs-boson production in association with a heavy vector boson V (VH, with V=W,Z) at high energies is presented. Dedicated Higgs-boson reconstruction techniques are applied to reconstruct the highly Lorentz-boosted Higgs-boson decays into pairs of bottom quarks. The measurement is subsequently combined with a VH cross-section measurement at low and intermediate pT(V) to provide a differential cross-section measurement in kinematic fiducial volumes over the largest possible pT(V) range. All cross-section measurements agree with the SM predictions within relative uncertainties that range from 30% to 300%. The results are furthermore interpreted as limits on the parameters of a SM effective field theory. Finally, a combination of measurements of Higgs decays to heavy-flavour quarks is used to experimentally determine that the Higgs-boson coupling to charm quarks is weaker than to bottom quarks, as predicted by the SM. The target audience for the thesis are physicists and physics students, in particular those with a background in high energy physics.