oalib
匹配条件: “” ,找到相关结果约100条。
列表显示的所有文章,均可免费获取
第1页/共100条
每页显示
Search for Physics Beyond the Standard Model at BaBar and Belle  [cached]
Calderini G.
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20122804005
Abstract: Recent results on the search for new physics at BaBar and Belle B-factories are presented. The search for a light Higgs boson produced in the decay of different γ resonances is shown. In addition, recent measurements aimed to discover invisible final states produced by new physics mechanisms beyond the standard model are presented.
New Physics Searches at BaBar  [PDF]
Francesco Renga
Physics , 2008, DOI: 10.1063/1.3051947
Abstract: We will present the most recent results from the BABAR Collaboration concerning New Physics searches in rare B and Lepton Flavour Violating (LFV) decays, including b --> s transitions, purely leptonic B decays and LFV tau decays.
Low mass New Physics search for a CP-odd Higgs boson $A^0$ deacying to $s\bar s$ or gluon gluon at BaBar  [PDF]
Elisa Guido
Physics , 2014,
Abstract: We report on the search for the decay $\Upsilon(1S) \to \gamma A^0$, $A^0 \to gg$ or $s\bar s$, where $A^0$ is the pseudoscalar light Higgs boson predicted by the next-to-minimal supersymmetric standard model. A sample of $\sim 18 \times 10^6$ $\Upsilon(1S)$ resonances, produced in the BaBar experiment via $e^+e^- \to \Upsilon(2S) \to \pi^+\pi^-\Upsilon(1S)$, is used for this search. No significant signal has been found, and upper limits at the $90\%$ of confidence level are set on the product branching fraction of the process.
Searches for New Physics in CP Violation from BaBar  [PDF]
Fernando Palombo
Statistics , 2012,
Abstract: Results of recent searches for new physics in CP violation in charm decays from the BABAR experiment are presented. These results include a measurement of $D^0$ - $\bar{D}^0$ mixing and searches for CP violation in two-body $D^0$ decays, a search for CP violation in the charm decays $D^{\pm} \to K^0_S K^{\pm}$ and $D^{\pm}_s \to K^0_S K^{\pm}$, $K^0_S \pi^{\pm}$, and a search for direct CP violation in the singly-Cabibbo suppressed $D^{\pm} \to K^+ K^- \pi^{\pm}$ decays. These studies are based on the final dataset collected by BABAR at the PEP-II B factory at SLAC in the period 1999-2008. No evidence of CP violation is found in these charm decays. The measured mixing parameter $y_{CP} = [0.72 \pm 0.18 (stat) \pm 0.12 (syst)]$% excludes the no-mixing null hypothesis with a significance of 3.3$\sigma$.
Search for CP violation and new physics in rare B decays at the B factories  [PDF]
G. Marchiori,for the BABAR,Belle Collaborations
Physics , 2012,
Abstract: We summarize recent results by the BABAR and Belle Collaborations on the search for CP violation and new physics beyond the Standard Model in several rare B meson decays. The measurements exploit the final BABAR and Belle Upsilon(4S) datasets, which consist of approximately 470 and 772 million BBbar pairs, respectively.
Searching for New Physics: Results from Belle and Babar  [PDF]
K. Kinoshita
Physics , 2007,
Abstract: The $B$-factories provide rich opportunities to search for new phenomena, in $B$, charm, and tau decays. Presented here is a selection of recent results from Belle and Babar.
Search for Light New Physics at Factories  [PDF]
Bertrand Echenard
Advances in High Energy Physics , 2012, DOI: 10.1155/2012/514014
Abstract: Many extensions of the Standard Model include the possibility of light new particles, such as light Higgs bosons or dark matter candidates. These scenarios can be probed using the large datasets collected by B factories, complementing measurements performed at the LHC. This paper summarizes recent searches for light new physics conducted by the BABAR and Belle experiments. 1. Introduction From supersymmetry to dark matter, many extensions of the Standard Model (SM) include the possibility of light new physics. Thanks to their large luminosities, factories offer an ideal environment to explore these theories. During the last decade, the BABAR Collaboration at PEP-II [1] and the Belle Collaboration at KEKB [2, 3] have, respectively, collected about 550? and more than 1? of data at several resonances, mostly the resonance (see Table 1). These datasets have been exploited to explore many aspects of precision physics, including searches for light new particles. In the following, we review searches for light Higgs bosons, dark matter candidates, hidden sectors, sgoldstinos, and Majorana neutrinos. Table 1: Integrated luminosities ( ) collected by the factories at different center-of-mass energies. The off-resonance data were collected about 40?MeV below the resonance at BABAR and at a similar offset for the and resonances in the case of Belle. 2. Search for Light -Odd Higgs Boson in Decays A light Higgs boson is predicted by several extensions of the Standard Model, such as the Next-to-Minimal Supersymmetric Standard Model (NMSSM). The NMSSM Higgs sector contains a total of seven states, three -even, two -odd, and two charged Higgs bosons. A -odd Higgs boson ( ) lighter than can evade present experimental constraints [4], and could be detected through radiative decays [5]. The corresponding branching fraction could be as large as a few , well above the sensitivity of factories [4, 6]. The Higgs boson decay pattern depends on its mass and couplings, as well as the NMSSM particle spectrum. In the absence of light neutralinos, the decays predominantly into a pair of muons below , while and hadronic final states become significant above this threshold. The branching fraction may be dominant if the neutralino ( ) is the lightest stable particle with [7]. In this case, the neutralino is a natural dark matter candidate. BABAR has performed searches for a light -odd Higgs boson in a variety of decay channels. These measurements are discussed in the next paragraphs, and the results are summarized in Table 2. They place stringent constraints on light -odd Higgs models.
Direct Searches for New Physics Particles at BABAR  [PDF]
Gerald Eigen,for the BABAR collaboration
Physics , 2015, DOI: 10.1088/1742-6596/631/1/012034
Abstract: We present recent BABAR results on searches for dark photons, long-lived scalar particles and new pi0-like particles.
New Physics Search in Flavour Physics  [PDF]
Tobias Hurth
Physics , 2005, DOI: 10.1016/j.nuclphysbps.2006.02.130
Abstract: With the running B, kaon and neutrino physics experiments, flavour physics takes centre stage within today's particle physics. We discuss the opportunities offered by these experiments in our search for new physics beyond the SM and discuss their complementarity to collider physics. We focus on rare B and kaon decays, highlighting specific observables in an exemplary mode. We also comment on the so-called B --> pi pi and B --> K pi puzzles. Moreover, we briefly discuss the restrictive role of long-distance strong interactions and some new tools such as QCD factorization and SCET to handle them.
Search for New Physics at CDF  [PDF]
John Strologas
Physics , 2009,
Abstract: We present the current status of the search for new physics at CDF, using integrated luminosity up to 3.2 fb-1. We cover searches for supersymmetry, extra dimensions, new heavy bosons, and generic dilepton resonances.
第1页/共100条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.