Search for a Low-Mass Higgs Boson (A0) at BaBar PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Search for a Low-Mass Higgs Boson (A0) at BaBar PDF full book. Access full book title Search for a Low-Mass Higgs Boson (A0) at BaBar by . Download full books in PDF and EPUB format.
Author: Publisher: ISBN: Category : Languages : en Pages : 4
Book Description
The BABAR Collaboration has performed three searches for a light Higgs boson, A°, in radiative Upsilon decays:?(3S) →?A°, A° →??−;?(nS) →?A°, A° →?+?− (n = 2,3); and?(3S) →?A°, A° → invisible. Such a Higgs boson (A°) appears in the Next-to-Minimal Supersymmetric extensions of the Standard Model, where a light CP-odd Higgs boson couples strongly to b-quarks. The searches are based on data samples that consist of 122 x 106?(3S) and 99 x 106?(2S) decays, collected by the BABAR detector at the SLAC National Accelerator Laboratory. The searches reveal no evidence for an A°, and product of branching fractions upper limits, at 90% C.L., of (1.5-16) x 10−5, (0.44-44) x 10−6, and (0.7-31) x 10−6 were obtained for these searches, respectively. Also, we set the upper limits?(?{sub b} →?+?−)
Author: Publisher: ISBN: Category : Languages : en Pages : 4
Book Description
The BABAR Collaboration has performed three searches for a light Higgs boson, A°, in radiative Upsilon decays:?(3S) →?A°, A° →??−;?(nS) →?A°, A° →?+?− (n = 2,3); and?(3S) →?A°, A° → invisible. Such a Higgs boson (A°) appears in the Next-to-Minimal Supersymmetric extensions of the Standard Model, where a light CP-odd Higgs boson couples strongly to b-quarks. The searches are based on data samples that consist of 122 x 106?(3S) and 99 x 106?(2S) decays, collected by the BABAR detector at the SLAC National Accelerator Laboratory. The searches reveal no evidence for an A°, and product of branching fractions upper limits, at 90% C.L., of (1.5-16) x 10−5, (0.44-44) x 10−6, and (0.7-31) x 10−6 were obtained for these searches, respectively. Also, we set the upper limits?(?{sub b} →?+?−)
Author: Publisher: ISBN: Category : Languages : en Pages : 7
Book Description
We search for a light Higgs boson A° in the radiative decay Y(3S) →?A°, A° → TT−, T+ → e+?{sub e}?{sub T}, or T+ →?+?{sub {mu}T}. The data sample contains 122 x 106 Y(3S) events recorded with the BABAR detector. We find no evidence for a narrow structure in the studied T+T− invariant mass region of 4.03 m{sub T+T−}
Author: Publisher: ISBN: Category : Languages : en Pages : 8
Book Description
We report on a search for the standard model Higgs boson decaying into pairs of? leptons in p{bar p} collisions produced by the Tevatron at √s = 1.96 TeV. The analyzed data sample was recorded by the CDFII detector and corresponds to an integrated luminosity of 6.0 fb−1. The search is performed in the final state with one? decaying leptonically and the second one identified through its semi-hadronic decay. Since no significant excess is observed, a 95% credibility level upper limit on the production cross section times branching ratio to the?? final state is set for hypothetical Higgs boson masses between 100 and 150 GeV/c2. For a Higgs boson of 120 GeV/c2 the observed (expected) limit is 14.6 (15.3) the predicted value.
Author: Luis Roberto Flores Castillo Publisher: 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.
Author: Publisher: ISBN: Category : Languages : en Pages : 25
Book Description
A search is reported for a light pseudoscalar Higgs boson decaying to a pair of ? leptons, produced in association with a $b\bar{b}$ pair, in the context of two-Higgs-doublet models. The results are based on pp collision data at a centre-of-mass energy of 8 TeV collected by the CMS experiment at the LHC and corresponding to an integrated luminosity of 19.7 fb-1. Pseudoscalar boson masses between 25 and 80 GeV are probed. There was no evidence for a pseudoscalar boson found and upper limits were set on the production cross section times branching fraction to t pairs between 7 and 39 pb at the 95% confidence level. This search excludes a pseudoscalar Higgs boson with mass below 80 GeV, in Type II two-Higgs-doublet models with a negative coupling of standard model-like Higgs boson to down-type fermions.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
We present combined searches for the low mass Standard Model Higgs boson at a center-of-mass energy of (square root)s = 1.96 TeV, using up to 5 fb−1 of data collected with the D0 detector at the Fermilab Tevatron collider. The major contributing processes are associated production (WH --> lvbb, ZH --> vvbb, ZH --> llbb). The significant improvements across the full mass range resulting from the larger data sets and improved analyses as well as future prospects are discussed.
Author: John V. Lee Publisher: 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.
Author: 
Author: 
Author: 
Author: ![Search for a Low-mass Higgs Boson in Y(3S)--] Gamma A0̂, A0̂--] Tau ̂tau-̂ at BABAR. PDF](https://books.google.com/books/content/images/frontcover/mt3_wQEACAAJ?fife=w80-h100)
Author: 
Author: Pavel Jež
Author: 
Author: Luis Roberto Flores Castillo
Author: 
Author: 
Author: John V. Lee