مطالعه طیف جرم ناوردای \Sigma\pi ناشی از برهم‌کنش کائون در-پرواز کائون بر روی هسته هدف دوترون

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

گروه فیزیک، دانشکده علوم پایه، دانشگاه شهرکرد، شهرکرد، 115 ایران

چکیده

در این مقاله، با استفاده از رهیافت کانال‌های جفت‌شده، طیف جرم ناوردای ناشی از برهم‌کنش کائون در-پرواز با هسته دوترون، مورد بررسی قرار گرفته است. در محاسبه سطح مقطع واکنش، دو فرآیند تک- و دو-برهم‌کنشی در نظر گرفته شده است. در تکانه‌های کوچک کائون فرودی ، فرآیند تک-برهم‌کنشی غالب است در حالی که در تکانه‌های بزرگ ، سهم فرآیند دو برهم‌کنشی قابل چشم‌پوشی نیست و باید در دامنه برهم‌کنش منظور شود. با استفاده از آنالیز و در نظر گرفتن جمعیت ها، طیف‌های نظری را بر داده‌های تجربی براون در زیر آستانه برازش داده‌ایم که جرم و پهنای را به‌ترتیب و به‌دست آورده‌ایم. نتیجه حاضر هرچند با نتایج حاصل از مدل‌های کایرال در توافق نسبتا خوبی است، اما با مقدار فعلی آن‌ در جدول داده‌های ذرات سازگار نیست.

کلیدواژه‌ها


عنوان مقاله [English]

Study ofSigmapi invariant mass spectrum of in-flight kaon interaction on the deuteron target

نویسندگان [English]

  • Jafar Esmaili
  • Hamed Abdellahi
Department of Physics, Faculty of Basic Sciences, Shahrekord University, Shahrekord 115
چکیده [English]

In this article, using the coupled-channel procedure, invariant mass spectra of in-flight kaon interaction on the deuteron target is investigated. In the calculation of interaction cross section, two processes as one- and two-interaction process are considered. The one-interaction process dominate at low values momenta of the incident kaon whereas the two-interaction contribution is not negligible at high values and both processes should be considered in the total cross section amplitude. By using analysis and considering of population, the sub-threshold theoretical invariant mass spectra are fitted to Braun’s data that the mass and width of are respectively extracted and . Although the present result, is fairly good agreement with the results of the chiral models, but does not consistent with the current value of the Particle Data Group.

کلیدواژه‌ها [English]

  • Lambda(1405)
  • K^--d interaction
  • and kaonic nuclei
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