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Charge symmetry and neutral current in a unified model of weak and electromagnetic interactions

Зарядовая симметрия и нейтральный ток в единой модели слабых и злектромагнитных вэаимодействий

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Il Nuovo Cimento A (1965-1970)

Summary

It is pointed out that measurement of the ratio {ie33-1} and theV — A interference term for the high-energy inclusive processes {ie33-2} + anything ({ie33-3} is the proton-neutron average) can give an estimate of the violation of charge symmetry in these processes. We then give an expression for charge symmetry violation in terms of experimentally measured structure functions above the charm threshold for the above processes for the Salam-Weinberg model. In addition, we give predictions for the neutral current for the processes {ie33-4} + anything, below and above the charm threshold for charged currents. It is pointed out that the predictions for the neutral current below the charm threshold are the same as those due to a phenomenological neutral current withSU 3 structure {ie33-5}. We use light-cone algebra to obtain our results in the scaling region.

Riassunto

Si puntualizza il fatto che una misura del rapporto {ie50-1} e del termine di interferenzaV — A per le reazioni inclusive di alta energia {ie50-2} + altro ({ie50-3} sta per la media protone-neutrone) può fornire una stima della violazione della simmetria di carica in queste reazioni. Si dà quindi un’espressione per la violazione della simmetria di carica in funzione di funzioni di struttura misurate sperimentalmente prima della soglia di incanto per i processi precedenti per il modello di Salam-Weinberg. Inoltre, si fanno previsioni sulle correnti neutre per le reazioni {ie50-4} + altro, prima e dopo la soglia di incanto per correnti cariche. Si puntualizza che le previsioni per le correnti neutre sotto la soglia di incanto sono le stesse di quelle per la corrente neutra fenomenologica con struttura diSU 3 {ie50-5}, in cui {ie50-6}. Si usa l’algebra del cono di luce per ottenere i nostri risultati nella regione di scala.

Реэюме

Отмечается, что иэмерение отнощения {ie50-7} иV — A интерференционного члена для инклюэивных процессов при высоких знергиях {ie50-8} + что-нибудь (где {ie50-9} представляет среднее протонов-нейтронов) может дать оценку для нарущения эарядовой симметрии в зтих процессах. Затем мы приводим выражение для нарущения эарядовой симметрии в виде зкспериментально иэмеренных структурных функций выще порога для приведенных выще процессов для модели Салама-Вейнберга. Кроме того, мы делаем предскаэания для нейтрального тока для процесса {ie50-10} + что-нибудь, для эаряженных токов ниже и выще порога. Отмечается, что предскаэания для нейтрального тока ниже порога совпадают с предскаэаниями феноменологического нейтрального тока сSU 3 структурой {ie50-11}. Мы испольэуем алгебру на световом конусе для получения нащих реэультатов в области подобия.

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  1. Fayyazuddin

    Present address: the University of Islamabad, Islamabad

Authors and Affiliations

  1. CERN, Geneva

    Fayyazuddin

  2. Pakistan Atomic Energy Commission, Islamabad

    Riazuddin

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Fayyazuddin, Riazuddin Charge symmetry and neutral current in a unified model of weak and electromagnetic interactions. Nuov Cim A 23, 33–50 (1974). https://doi.org/10.1007/BF02748292

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