hadron collision 中文意思是什麼
hadron collision
解釋
強子碰撞-
The knowledge of these initial collision is crucial for any theoretical treat - ment of a possible parton - hadron phase transition, the detection of which being the ultimate aim of all the efforts of co1liding heavy ions at very high energies. the parton model allows to calculate inclusive cross sections as a convolution of any elementary cross section with parton distribution functions, assuming that factorization works. the disadvantage is that tlle first interaction is coilsidered quite differently from the subsequent ones in case of multiple scattering
其它的弦模型在計算幾率時，忽略了入射能量在pomeron之間的分配，破壞了能量守恆，而且把pomeron作為全同粒子處理，即pomeron之間是不可區分的；然而在處理粒子產生時，這些模型雖然考慮了能量守恆，但是第一個pomeron的粒子產生與其它的pomeron很不一樣? ? pomeron在粒子產生時不是全同的。 -
But in the present available hadron - hadron collision experiments, due to the restriction of energy, the average multiplicity is very low. and the rank of the factorial moments could not be high
但是，目前的強子?強子碰撞能量較低，制約了階乘矩的階數，沒有明顯看到非熱相變的跡象。 -
Therefore it is necessary to study the contribution of hadron environment to the suppression. many works have studied j / suppression in hadron environment with glauber model. but the combination of nucleus absorption and comover mechanism in hadron environment can not explain the abnormal suppression of j / production in pb - pb collision yet
但是強子環境中的核吸收和同行粒子對j w的相互作用機制結合起來仍不能解釋pbpb碰撞過程中j w的反常壓低，也就是說需要引入新的機制，這可能預示著夸克一膠子等離子體的形成。 -
Therefore j / v is the border guard of perturbative quark and gluon and non - perturbative hadron. j / v production can be divided into two phases : cc pairs are produced from initial short - range parton scattering in nucleus - nucleus collision, then the produced cc pairs proceed to evolving into physical bound state
基於對強子?強子碰撞中j產生的研究，目前人們認為j的產生可分成兩個階段：入射強子和靶強子先通過部分子過程產生cc對，然後cc對再演化為物理的j束縛態。
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