搜索结果: 1-15 共查到“物理学 HERA”相关记录16条 . 查询时间(0.041 秒)
Search for Squarks in R-parity Violating Supersymmetry in ep Collisions at HERA
Squarks R-parity Violating Supersymmetry ep Collisions at HERA
2011/1/4
A search for squarks in R–parity violating supersymmetry is performed in e±p collisions
at HERA using the H1 detector. The full data sample taken at a centre–of–mass
energy √s = 319 GeV is used for ...
The analysis of events containing multiple high PT leptons (electrons and muons) produced in
e±p collisions has been performed with the H1 and ZEUS detectors at HERA, using the full data
sets collec...
This report is a short overview of experimental and theoretical results in J/ production in electron-proton collisions at DESY HERA with special focus lying on recent developments in inelastic photop...
Measurement of the energy dependence of the total photon-proton cross section at HERA
Measurement energy dependence total photon-proton
2011/1/4
The energy dependence of the photon-proton total cross section, σγp tot , was determinedfrom e+p scattering data collected with the ZEUS detector at HERA at three values of the center-of-mass energy, ...
Recent Results on Strangeness，Charm and Beauty Production at HERA
strange hadrons heavy flavor production ep collision
2010/5/7
Based on the data collected with the H1 and ZEUS detectors at HERA, recent results on strangeness, charm and beauty production in ep collision are presented.
Inclusive-jet cross sections in NC DIS at HERA and a comparison of the kT, anti-kT and SIScone jet algorithms
jet cross sections SIScone jet algorithms NC DIS
2010/3/16
For the first time, differential inclusive-jet cross sections have been measured in neutral current deep inelastic ep scattering using the anti-kT and SIScone algorithms. The measurements were made fo...
Inelastic Production of J/psi Mesons in Photoproduction and Deep Inelastic Scattering at HERA
Photoproduction Deep Inelastic Scattering
2010/3/15
A measurement is presented of inelastic photo- and electroproduction of J/psi mesons in ep scattering at HERA. The data were recorded with the H1 detector in the period from 2004 to 2007. Single and d...
The parton distribution functions (PDFs) are a non-negotiable input to almost all theory predictions at hadron colliders. In this talk, I introduce PDF determination by global analysis and discuss sel...
Scaled momentum spectra in deep inelastic scattering at HERA
deep inelastic scattering particle production
2010/3/15
Charged particle production has been studied in neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 0.44 fb^-1. Distributions of scaled moment...
HERA硬光生过程中的光子产生
硬光生过程 直接光子 分解光子
2009/7/9
在领头级近似下计算了HERA硬光生过程中直接光子和分解光子与质子作用的单、双光子产生截面.结果表明:当xT≤0.15时,对单光子产生的主要贡献来自于分解光子过程;当xT≥0.15时,主要贡献来自于直接光子过程.双光子的主要产生源则是分解光子的两个子过程:qq→γγ和gg→γγ,且双光子的产生截面与同等条件下,h1h2→γγX的截面在同一量级.研究双光子产生有助于探明分解光子的结构.
HERA分解光子过程中的双喷注产生
分解光子 双喷注产生 NLO修正
2009/7/9
在次领头级(NLO)近似下计算了HERA分解光子过程中的双喷注截面.结果表明:在分解光子过程中,NLO修正量(当不变质量大于20GeV时)约为LO的0.5到1.这一结果可解释ZEUS的数据分析结果:“LOQCD理论值比实验值低1.5到2个因子.”当双喷注不变质量MJJ<30GeV=,快度yJJ<—1时,光子的胶子分布决定了双喷注截面.利用这一特点可测量光子的胶子分布.当双喷注不变质量较大时(例如:...
Top介子与HERA和THERA对撞机上的单顶夸克产生
Top介子 单顶夸克产生 HERA对撞机 THERA对撞机
2008/1/27
讨论计算了TC2模型预言的Top介子在HERA和构想中的THERA对撞机上对t道eq→et过程中的单顶夸克产生的贡献.结果表明:中性Top介子对ec→et过程中的单顶夸克产生有较大的贡献.在绝大部分参数空间内,过程的产生截面在1—6pb范围内,因此,在HERA和THERA对撞机上通过eq→et过程可探测中性Top介子的可能物理迹象
Diffractive Scattering Factorization from J/ψ and
γ Associated Production in HERA ep Collisions
diffractive Pomeron color-octet
2007/8/15
2002Vol.38No.5pp.583-586DOI:
Diffractive Scattering Factorization from J/ψ and
γ Associated Production in HERA ep Collisions
YAN Zhan-Yuan1 and DUAN Chun-Gui2,3
1 ...
Observation of Events at Very High Q2 in e+p Collisions at HERA
Very High Q2 +p Collisions
2010/4/19
Data collected at the e+p collider HERA at DESY by the experiments H1 and ZEUS have allowed to probe a previously inaccessible domain of very large Q2 in deep-inelastic ep scattering. For Q2 > 15000 G...
In this proceeding I discuss the proposal of constructing a g p collider at DESY based on a Linac-Ring type ep machine, the HERA+LC. A high energy g beam for this collider is produced by the Compton b...