تئوری میدان کوانتوم -۲ب / جلسه ۶: ایجاد و انهدام ذرات - NATPHYS

New channel Lectures in Theoretical Physics - Masud Naaseri: title sample judged 'pick' (Most uploads are legitimate rigorous QFT/theoretical physics lecture series, but some clips promote books or veer into h); passed a second screen for sellers/exam-prep/re-uploads; 2 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.