Measurement of {sigma}{sub {lambda}{sub b}{sup 0}}/{sigma}{sub B{sup 0}}xB({lambda}{sub b}{sup 0}{yields}{lambda}{sub c}{sup +}{pi}{sup -})/B(B{sup =} 0{yields}D{sup +}{pi}{sup -}) in pp Collisions at {radical}(s)=1.96 TeV
- University of Illinois, Urbana, Illinois 61801 (United States)
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
We present the first observation of the baryon decay {lambda}{sub b}{sup 0}{yields}{lambda}{sub c}{sup +}{pi}{sup -} followed by {lambda}{sub c}{sup +}{yields}pK{sup -}{pi}{sup +} in 106 pb{sup -1} pp collisions at {radical}(s)=1.96 TeV in the CDF experiment. In order to reduce systematic error, the measured rate for {lambda}{sub b}{sup 0} decay is normalized to the kinematically similar meson decay B{sup 0}{yields}D{sup +}{pi}{sup -} followed by D{sup +}{yields}{pi}{sup +}K{sup -}{pi}{sup +}. We report the ratio of production cross sections ({sigma}) times the ratio of branching fractions (B) for the momentum region integrated above p{sub T}>6 GeV/c and pseudorapidity range |{eta}|<1.3: {sigma}(pp{yields}{lambda}{sub b}{sup 0}X)/{sigma}(pp{yields}B{sup 0}X)xB({lambda}{sub b}{sup 0}{yields}{lambda}{sub c}{sup =} +{pi}{sup -})/B(B{sup 0}{yields}D{sup +}{pi}{sup -})=0.82{+-} 0.08(stat){+-}0.11(syst){+-}0.22[B({lambda}{sub c}{sup +}{yields}pK{sup -}{pi}{sup +})].
- OSTI ID:
- 20951118
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.98.122002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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