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#پروتون
طبق آخرین نتایجی که از داده‌های آزمایشگاهی به دست آمده‌اند، احتمالا پروتون شکل فضایی کروی ندارد و بیشتر شبیه به دونات است!
به‌این‌صورت که کوارک‌های ظرفیت، برخلاف تصور قبلی، تنها در شعاعی (حدوداْ) بین ۰.۷ فمتو متر و ۰.۸ فمتو متر قرار دارند و مرکز پروتون بیشتر از گلوئون‌ها و کوارک‌های دریا احاطه گردیده‌است. البته درک ساختار پروتون همچنان به‌صورت یک "معما" در فیزیک ذرات بنیادی حضور دارد و مطالعه بر روی این ذره‌ی شگفت‌انگیز ادامه خواهد داشت.
در مقاله‌ی زیر، که به تازگی در مجله‌ی نیچر چاپ شده‌است، عامل‌شکل گرانشی گلوئون در پروتون و همچنین شعاع جرمی گلوئون‌ها درون پروتون محاسبه گردیده‌است.
https://www.nature.com/articles/s41586-023-05730-4

انجمن علمی فیزیک دانشگاه فردوسی
Forwarded from Particle Physics (Fatemeh Irani)
#پروتون
طبق آخرین نتایجی که از داده‌های آزمایشگاهی به دست آمده‌اند، احتمالا پروتون شکل فضایی کروی ندارد و بیشتر شبیه به دونات است!
به‌این‌صورت که کوارک‌های ظرفیت، برخلاف تصور قبلی، تنها در شعاعی (حدوداْ) بین ۰.۷ فمتو متر و ۰.۸ فمتو متر قرار دارند و مرکز پروتون بیشتر از گلوئون‌ها و کوارک‌های دریا احاطه گردیده‌است. البته درک ساختار پروتون همچنان به‌صورت یک "معما" در فیزیک ذرات بنیادی حضور دارد و مطالعه بر روی این ذره‌ی شگفت‌انگیز ادامه خواهد داشت.
در مقاله‌ی زیر، که به تازگی در مجله‌ی نیچر چاپ شده‌است، عامل‌شکل گرانشی گلوئون در پروتون و همچنین شعاع جرمی گلوئون‌ها درون پروتون محاسبه گردیده‌است.
https://www.nature.com/articles/s41586-023-05730-4
hottg.com/physics_um/1776
926 viewsPooya Khadivi M, 


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Telegram announces Anonymous Admins

The cloud-based messaging platform is also adding Anonymous Group Admins feature. As per Telegram, this feature is being introduced for safer protests. As per the Telegram blog post, users can “Toggle Remain Anonymous in Admin rights to enable Batman mode. The anonymized admin will be hidden in the list of group members, and their messages in the chat will be signed with the group name, similar to channel posts.”

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