搜索结果: 1-13 共查到“原子核物理学 pp”相关记录13条 . 查询时间(0.078 秒)
太阳内核产生的PP中微子被直接探测到（图）
太阳 核 PP中微子
2014/9/1
借助全球最敏感的中微子探测器，一支国际物理学家团队第一次向全世界报告，他们已经直接探测到了在太阳内核发生的、由“基础”质子—质子（PP）融合过程产生的中微子。
Pseudorapidity distributions of produced charged hadrons in pp collisions at RHIC and LHC energies
produced charged hadrons RHIC LHC energies
2011/7/21
The energy dependence of charged-hadron production in proton-proton collisions at RHIC and LHC energies is investigated in a nonequilibrium-statistical relativistic diffusion model (RDM) with three so...
Study of $ππ$ correlations at LHC and RHIC energies in $pp$ collisions within the quark-gluon string model
quark-gluon string model RHIC energies
2011/7/21
The Quark Gluon String Model (QGSM) reproduces well the global characteristics of the $pp$ collisions at RHIC and LHC, e.g., the pseudorapidity and transverse momenta distributions at different centra...
Production of Neutral Pions and Eta-mesons in pp Collisions Measured with ALICE
Neutral Pions Eta-mesons pp Collisions ALICE
2011/7/21
Invariant cross sections for neutral pions and eta mesons in pp collisions at sqrt(s) = 0.9, 2.76, and 7 TeV were measured by the ALICE detector at the Large Hadron Collider. Next-to-leading order (NL...
Heavy-flavour production in pp and Pb-Pb collisions at ALICE
Heavy-flavour production pp Pb-Pb collisions ALICE
2011/7/21
In this contribution, recent ALICE measurements of the production cross section of single electrons, single muons and open charmed mesons in proton-proton collisions at sqrt(s) = 7 TeV are reported. T...
Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 0.9 and 2.36 TeV
Transverse momentum hadrons pp collisions
2010/3/15
Measurements of inclusive charged-hadron transverse-momentum and pseudorapidity distributions are presented for proton-proton collisions at sqrt(s) = 0.9 and 2.36 TeV. The data were collected with the...
Energy calibration of tagged photons by the d(γ, π－pp) reaction
deuteron pion photoproduction tagged photon
2009/12/24
The energy of tagged photons, which were provided from the internal photon tagging system of the Laboratory of Nuclear Science, Tohoku University, has been calibrated using the d(γ, π－pp) reaction. Ch...
N*(1535) contribution in pp→ppη´ and pn→dφ
meson production nucleon-nucleon collision resonance
2009/11/24
In an effective Lagrangian model we find that the N*(1535) resonance contribution might be important to the interpretation of the present data of the pp→ppη´ and pn→dφ reactions. The strong coup...
pp→ΛΛ过程的胶子交换势与pp→ΛΛ过程的反应截面
pp→ΛΛ跃迁过程 胶子交换势 反应截面
2009/7/6
本文给出了夸克-反夸克对 湮没和夸克-反夸克对 产生过程的单胶子和双胶子交换势准至P2/m2级近似的形式,据此推出了pp→ΛΛ过程的等效位势.应用这个位势在平面波玻恩近似(PWBA)下计算pp→ΛΛ反应的微分截面和总截面,得到了与实验符合得较好的结果.
ψ′→pp角分布测量中的效率修正
效率修正 角分布 参考衰变道
2009/7/3
利用参考衰变道J/ψ→pp的高统计量通过判选条件转换实现对ψ′→pp过程角分布测量中Monte Carlo效率的修正, 并对该方法可能带来的系统误差进行估计, 这些结果被用于ψ′→pp角分布的测量.
在北京谱仪(BES)原有模拟程序框架下,建立了适用于J/ψ,ψ’衰变到VP和PP模式、以及ψ→π+π－ J/ψ而后J/ψ衰变到VP和PP模式的事例产生器,考虑了相应的角分布,为J/ψ,ψ′物理的研究提供了方便,在ψ′→γη,γη′,ωπ0,π+π－,K+,K－等分支比的测量中,这一事例产生器可用于选择效率的确定和本底估计.
通过J/ψ→ppω 衰变研究N*的理论公式
J/ψ衰变 核子激发态 分波分析法
2009/6/3
给出了利用J/ψ→ppω研究N*分波分析理论公式. 结合BES的58M J/ψ事例，将对可能存在的低激发态N*进行研究.