搜索结果: 1-15 共查到“物理学 eta”相关记录15条 . 查询时间(0.09 秒)
Chiral anomaly and eta-eta ' mixing
Octet singlet pseudoscalar decay constant mixing Angle
2014/12/22
We determine the η-η′ mixing angle via a procedure relatively independent of theoretical assumptions by simultaneously fitting η,η′ reactions involving the anomaly η,η′→γγ, π+π-γ. We extract reasonabl...
Allowed eta-decay modes and chiral symmetry
Chiral perturbation theory the low energy kaon reaction
2014/12/22
Recently, the development of chiral perturbation theory has allowed the generation of rigorous low-energy theorems for various hadronic processes based only on the chiral invariance of the underlying ...
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...
近代物理研究所Eta介子产生的理论研究获进展（图）
近代物理研究所 Eta介子 理论研究
2011/4/29
近日，中科院近代物理研究所科研人员通过手征夸克模型研究了eta在光致产生和pion－nucleon散射中的产生机制，通过少量参数很好地描述了质量谱和全能区的反应截面。相关研究结果发表在Physics review C 82,035206(2010)。
中国科学院近代物理研究所Eta介子产生的理论研究获重要进展（图）
中国科学院近代物理研究所 Eta介子 理论研究
2011/10/19
近日，中国科学院近代物理研究所科研人员通过手征夸克模型研究了eta在光致产生和pion－nucleon散射中的产生机制，通过少量参数很好地描述了质量谱和全能区的反应截面。相关研究结果发表在Physics review C82,035206(2010)。
Measurement of the energy flow in a large eta range and forward jets at LHC at sqrt(s)=0.9 TeV, 2.36 TeV and 7 TeV
Measurement the energy flow a large eta range forward jets LHC sqrt(s)=0.9 TeV, 2.36 TeV 7 TeV
2011/4/6
Measurement of the energy flow in a large eta range and forward jets at LHC at sqrt(s)=0.9 TeV, 2.36 TeV and 7 TeV 。
Tetraquark-based analysis and predictions of the cross sections and distributions for the processes e^+ e^- --> Upsilon(1S) (pi^+ pi^-, K^+ K^-, eta pi^0) near Upsilon(5S)
processes e^+ e^- --> Upsilon(1S) (pi^+ pi^-, K^+ K^-, eta pi^0) Upsilon(5S)
2011/1/5
We calculate the cross sections and final state distributions for the processes e+e−
!(1S)(+−,K+K−, 0) near the (5S) resonance based on the tetraquark hypothesis. This
framew...
Studies of tau- -> eta.K-.nu and tau- -> eta.pi-.nu at BaBar and a search for a second-class current
tau- -> eta.K-.nu tau- -> eta.pi-.nu at BaBar second-class current
2011/1/4
We report on analyses of tau lepton decays − ! K− and − ! − ,with +−0, using 470 fb−1 of data from the BABAR experiment at PEP-II, collected at cente...
The experimental data of the COSY-GEM collaboration for the recoil-free transfer reaction p(27Al,3He)π−p′X, leading to the formation of bound state of eta (η) meson in 25Mg nucleus, is reanalyze...
The nuclear states of K and are bound by a similar mechanism -the excitations of nucleons to Λ(1405) and N(1535) resonant states. The observed large differences in binding energies are understood i...
We report the rst observation of the decay D+ ! 0e+e in two analyses with signi cances
of 5.6 (total) and 5.8 (statistical) standard deviations. These analyses also provide the rst form factor me...
Chiral dynamics predictions for eta' -> eta pi pi
Chiral dynamics predictions eta' -> eta pi pi
2011/1/10
The Dalitz plot distribution of the ′ → decays is analyzed in the frameworks of
large-NC Chiral Perturbation Theory and Resonance Chiral Theory. The size of the ′
branching ratios is thus sati...
Chiral dynamics predictions for eta' -> eta pi pi
Chiral dynamics predictions eta' -> eta pi pi
2011/1/6
The Dalitz plot distribution of the ′ → decays is analyzed in the frameworks of
large-NC Chiral Perturbation Theory and Resonance Chiral Theory. The size of the ′
branching ratios is thus sati...
Interference and nuclear medium effects on the eta-mesic nuclear spectrum
Nuclear interaction of N⋆ (1535) Eta-mesic nucleus 25Mg
2011/1/6
he missing-mass spectrum obtained in a recoil-free transfer reaction p(27Al,3He)−p′X is
analyzed. We find that the observed peak structure arises from the coherent contributions from
two reac...
Primakoff effect in eta-photoproduction off protons
Primakoff effect eta-photoproduction off protons
2010/3/15
We analyse data on forward eta-meson photoproduction off a proton target and extract the eta to gamma gamma decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our anal...