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Title of Journal: Nuovo Cimento A 19651970

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Abbravation: Il Nuovo Cimento A (1965-1970)

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Springer Berlin Heidelberg

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DOI

10.1007/978-1-4757-4098-1

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1826-9869

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Effective trajectories in the presence of Regge cu

Authors: R J Rivers
Publish Date: 2016/01/08
Volume: 58, Issue: 1, Pages: 100-113
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Abstract

Given a Regge pole A with trajectory αAt we define an energydependent effective trajectory α A eff ts that takes into account the important Regge cuts We estimate that α A eff ts approaches the asymptotic effective leading trajectorybar alpha A left t right the envelope of αAt and its Pcut branch points slowly as a function ofs We explicitly calculate α ρ eff for the simple case of ππscattering in the Reggeized absorption model taking the ρ P P′ trajectories to be linear It is shown that for −t≲03 GeV2 α ρ eff ≈αρ and for −t≳06 GeV2alpha rho eff approx bar alpha rho The intermediate range is characterized by a dip and a peak due to destructive interference between the cut and pole amplitudes The sensitivity of the conclusion to the unknown or illdetermined parameters is discussedС помощью данного полюса Редже А с траекторией αAt мы устанавливаем эффективную траекторию зависящую от энергии α A эфф ts которая учитывает важные разрезы Редже Мы определяем что α A эфф ts приближается к асимптотической эффективной главной траекторииbar alpha A left t right огибающая αAt и ее Р точки ветвления медленно как функцияs Мы подробно вычисляем α ρ эфф для простого случая ππ рассеяния в реджеизованной абсорбционной модели считая что траектории ρ Р Р′ являются линейными Показывается что для −t≲03 ГэВ2 α ρ эфф ≈αρ и для −t≳06 ГэВ2 α ρ эфф ≈bar alpha rho Промежуточная область характеризуется провалом и пиком обусловленными отрицательной интерференцией между амплитудами разреза и полюса Обсуждается чувствительность выводов относительно неизвестных или неправильно определенных параметровDato un polo di Regge A con trajettoria αAt si definisce una traiettoria effettiva dipendente dall’energia α A eff ts che tiene conto dei tagli di Regge importanti Si stima che α A eff ts approssimi lentamente la traiettoria principale effettiva asintoticabar alpha A left t right l’inviluppo di αAt e dei suoi punti di diramazione del taglio P in funzione dis Si calcola esplicitamente α ρ eff per il caso semplice dello scattering ππ nel modello di assorbimento reggeizato postulando che le traiettorie ρ P e P′ siano lineari Si dimostra che per −t≲03 GeV2 α ρ eff ≈αρ e per −t≳06 GeV2alpha rho eff approx bar alpha rho Il tratto intermedio è caratterizzato da un incavo e da un picco dovuti ad interferenza distruttiva fra le ampiezze del taglio e del polo Si discute la sensibilità del risultato ai parametri non noti o mal determinati


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