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arXiv 1209.6541hep-ph
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轻子产生中强子的形成长度

Formation lengths of hadrons in lepto-production

Levon Grigoryan

摘要:

在对称Lund模型的框架下,研究了轻子与质子深度非弹性散射(DIS)过程中产生的强子的平均形成长度。结果表明,这些形成长度基本上取决于强子的电荷。对于电产生和带电电流(CC)中微子产生,带正电的粒子的平均形成长度大于带负电的反粒子。这种情况在CC抗中微子产生中是相反的。在所有上述情况下,主要机制是强子的直接产生。强子产生的额外机制,通过共振衰变,是必不可少的,只有π介子,并导致平均形成长度的减少。

英文摘要:

The average formation lengths of the hadrons produced during the deep inelastic scattering (DIS) of leptons on protons are studied in the framework of the symmetric Lund model. It is shown that these formation lengths essentially depend on the electric charges of the hadron. For electro-production and charged current (CC) neutrino-production, the average formation lengths of positively charged particles are larger than those of negatively charged antiparticles. This situation is reversed for CC antineutrino-production. In all the mentioned cases, the main mechanism is the direct production of hadrons. The additional mechanism of hadron production, through the decay of resonances, is essential only for pions and leads to a decrease in the average formation lengths.

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