4 ms·
two questions-- how does that differ from \Xi_b^0, which also seems to be a usb baryon? is there a standard way to pronounce those symbols (e.g. "xi star sub-
by adavies42 14y ago
two questions--
how does that differ from \Xi_b^0, which also seems to be a usb baryon?
is there a standard way to pronounce those symbols (e.g. "xi star sub-b")?
- sp332 14y agoClose, it's just like "zeye star bee". (edited)
- starwed 14y agoI believe the difference is in the overall angular momentum. (You can think that the quarks are somehow arranged differently inside the particle.) You can look at the particle data group's entries[1,2] for \Xi_b^0, which has J=1/2 and for \Xi_b^*, which has J=3/2. [1]http://pdglive.lbl.gov/Rsummary.brl?nodein=S060&exp=Y&sub=Yr&return=BXXX045 http://pdglive.lbl.gov/Rsummary.brl?nodein=S060&exp=Y... [2]http://pdglive.lbl.gov/Rsummary.brl?nodein=S062&sub=&return=SumB http://pdglive.lbl.gov/Rsummary.brl?nodein=S062&sub=&... -edit- Also, found a line on wikipedia discussing the notation of baryons that confirms this: >Baryons in total angular momentum J = 3⁄2 configuration that have the same symbols as their J = 1⁄2 counterparts are denoted by an asterisk.
- sp332 14y agoI just found this line in the article: The new discovery means that two of the three baryons predicted in the usb composition by theory have now been observed. It's not much to go on, but apparently there should be 3 usb baryons.