衰变宽度

发现当使用ALEPH实验数据时，此模型预言的衰变宽度可以减少到标准模型值的50%。

We find that the deviation of the decay width from the standard model prediction can be reduced by as much as 50 % when ALEPH experimental value is used .

ψ（2S）扫描实验中衰变宽度误差与亮度的确定

Determination of Decay Width Error and Luminosity in ψ( 2S ) Scan

用单胶子交换正反夸克对产生模型研究了ρ介子到2π介子和K到Kπ衰变宽度，理论与实验值基本相符。

Decay rates of p-meson into two π mesons and K ~ into K π mesons are calculated by using the One-Gluon-Exchange Quark-Antiquark pair creation model . The results are in agreement with the experimental data .

进一步，我们在较宽的t夸克质量范围内（50GeV&120GeV），计算了tt系的谱结构及轻子衰变宽度。

Furthermore , we have calculated the energy levels and leptonic widths of ( tt ) in a wide range of t quark mass ( 50GeV ~ 120GeV ) .

在LM中计及单圈顶角修正时计算核子共振态强衰变宽度及其耦合常数探讨

The Discussion of the Coupling Constant and Calculation of the Nucleon Resonance State Strong Decay Width When the Single Loop Vertex Correction is Taken into Consideration in the LM

采用含时黄金规则波包传播法，对低振动激发（ν＜12）vanderwaals分子HeI2（总角动量J＝0）的振动预离解计算了总和部分衰变宽度。

We have presented a calculation for the total and partial decay widths for vibrational predissociation for a low vibrational excited van der Waals molecule HeI_2 . The time-dependent golden rule wave packet method has been used in our numerical calculation for the decay widths .

然后，再将我们在前一篇文章所得到的能级表达式与由WKB近似法所推出的S波的原点波函数的模方表达式结合起来，求出轻子衰变宽度。

Further more , by the energy level formula obtained in the previous paper and the module square of S & wave zero point wave function formula from WKB approximation method , we evaluating the leptonic decay widths of heavy quarkonium .

场流关系和新粒子的衰变宽度

Field-current relations and some decay widths of the new particles

结果表明，衰变宽度在实验允许的误差范围内。

The results show that within the error ranges , the decay widths are acceptable by experiments .

接着，分析了其衰变宽度及其微分衰变宽度随夸克质量不确定性引起的不确定度。

Moreover , the uncertainties of the width and differential width for the quark masses are presented .

几乎对所有初始振动态，得到的总衰变宽度比线宽测量外推数据低约30%。

Nearly all of the computed decay widths are consistently underestimated by about 30 % than those extrapolated from linewidth measurements .

重点介绍了当前粒子物理学对轻标量介子研究的理论和实验现状，以及存在的主要问题。介绍了研究轻标量赝标量介子的质量夸克组成衰变宽度一些理论方法，及实验数据。

Experimental status and theoretical approach of the Scalar and pseudo-scalar mesons about its mass , quark composition and decay amplitude are detailed .

所得到的总衰变宽度随初始振动态的变化呈现一种非线性关系，这与较高振动激发的情况很相似。

Our obtained decay widths as a function of initial vibrational quantum numbers ν display a highly nonlinear behavior , similar to that for higher initial vibrational excitation .

所预言的总衰变宽度和寿命与谱线宽和皮秒时间分解的实时态－态测量外推数据符合得相当好。

Predicted the total decay widths and lifetimes are in fairly good agreement with those extrapolated from linewidth measurements and real time state to state studies using picosecond pump-probe and molecular beam techniques .

本文用共有夸克模型讨论了核内弱相互作用过程中的夸克效应，计算出了不同超核中∧粒子非介子衰变的宽度，并与其它模型的计算结果及实验值进行了比较。

By joint possessing quarks model , we studied the effect of quarks in nuclear weak interactions , calculated the width of A non-mesonic decay in different hypernuclei , and compared the results with the measurements and other existing calculations .

我们也考虑了标量胶球的四夸克衰变与两夸克衰变宽度之比。

We also consider the ratio of the decay widths for the four quark final states decay and two quark final states decay of a scalar glueball .

并用线性Sigma模型计算了所有可能一个轻标量介子衰变到两个轻赝标量介子的衰变宽度，以及计算结果与其他理论和实验数据进行的比较。

Decay widths of a scalar meson to two pseudo-scalar mesons are calculated in linear sigma model . Comparison of our results with experimental data and other theoretical calculations is given .

用不同形式的夸克结合势研究J／ψ的轻子衰变与色屏蔽质量的关系，用屏蔽质量与介质温度和密度的关系，得到J／ψ在热密物质中的轻子衰变宽度。

The relation between the leptonic decay width of J / ψ and the color screening mass at finite temperature is studied by using different quark binding potentials . The leptonic decay behaviour of J / ψ in the hot and dense matter is obtained .