B baryons at D-Zero
Conference
·
· PoS BEAUTY2009:043,2009
OSTI ID:1005027
The observation of the b baryons {Xi}{sub b}{sup -} and {Omega}{sub b}{sup -} in high energy proton-antiproton collisions in the D-Zero Detector at Fermilab's Tevatron Collider are presented, along with measurements of the masses and production rates of these states. Within the standard model a total of 15 b baryons are predicted (counting quark content only). Taking into consideration intrinsic angular momentum, there are 10 charmless b baryons in J=1/2 and J=3/2 muliplets. These states are unique to hadron colliders since the B factories operate at insufficient energy to produce them, and they are expected to be produced copiously at the Tevatron. There are interesting mass predictions for these states from various theoretical models but the experimental challenge to observe them is very substantial. At the start of Tevatron Run II ({approx}2003) only the {Lambda}{sub b} had been observed (first by the UA1 collaboration in 1991). However, in the past three years at the Tevatron, another four of the predicted J=1/2 states containing just one b quark have been observed. The {Sigma}{sub b}{sup +} (uub) and {Sigma}{sub b}{sup -} (ddb) were recorded by the CDF collaboration in the {Sigma}{sub b} {yields} {pi}{Lambda}{sub c} {pi} ({Lambda}{sub c} {pi}) channel while at D-Zero the {Xi}{sub b}{sup -} (bds) and {Omega}{sub b}{sup -} (bss) states were observed. The measurements leading to the identification of the latter two states are the subject of the remainder of this presentation.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1005027
- Report Number(s):
- FERMILAB-CONF-10-557-PPD
- Conference Information:
- Journal Name: PoS BEAUTY2009:043,2009
- Country of Publication:
- United States
- Language:
- English
Similar Records
The quark model and b baryons
The quark model and b baryons.
Heavy quark hadrons; A challenge to QCD
Journal Article
·
Wed Jan 14 23:00:00 EST 2009
· Annals of Physics (New York)
·
OSTI ID:21167695
The quark model and b baryons.
Journal Article
·
Wed Dec 31 23:00:00 EST 2008
· Ann. Phys.
·
OSTI ID:958017
Heavy quark hadrons; A challenge to QCD
Journal Article
·
Wed Dec 16 23:00:00 EST 2009
· AIP Conference Proceedings
·
OSTI ID:21325682