The discussion centers on the differential cross section, specifically addressing the disappearance of the term n_t*l in equation 9.9 and the dimensional inconsistency in the equation J_s=sigma_tot J_i. Participants confirm that n_t*l should be included in equation 9.9 to maintain unit consistency. They emphasize the importance of considering physical realities, noting that if either n_t or l equals zero, J_s must also equal zero, regardless of J_i.
PREREQUISITESThis discussion is beneficial for physics students, researchers in particle physics, and educators seeking to clarify concepts related to differential cross sections and dimensional analysis.
Looks like an error to me...Clara Chung said:
Yes, it should be zero :)jtbell said:Yes, insert ##n_t l## into (9.9) in such a way that the units are consistent on both sides.
A physical reality check: if ##l = 0## or ##n_t = 0##, i.e. the target disappears completely, what should we expect ##J_s## to be, regardless of ##J_i##?