Measurement of the Average Lifetime of B-hadrons Produced in P[bar P] Collisions At[radical]
Measurement of the Average Lifetime of B-hadrons Produced in P[bar P] Collisions At[radical]

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Published: 2001

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The average b-hadron lifetime has been measured using a high statistics sample of[ital B][r-arrow][ital J]/[psi][Chi] decays recorded with the Collider Detector at Fermilab. We use a sample with an integrated luminosity of[approx] 90[ital pb][sup -1] recorded during the 1994-95 running period. The decay vertices of[approx] 62656 inclusive[ital J]/[psi][r-arrow][mu][sup+][mu][sup -] candidates have been reconstructed using information from a silicon vertex-detector. The measured[ital B]lifetime, which is the average over all b-hadrons produced in[ital p][ital[anti p]] collisions at[radical]s= 1.8 TeV weighted by their branching ratios into[ital J]/[psi], is 1.524[+-] 0.015 ([ital stat])[sup+0.035][sub -0.026] ([ital sys]) ps. The precision of this measurement is significantly improved compared to the inclusive lifetime measurement published previously using[approx] 10[ital pb][sup -1].

Measurements of the Masses, Lifetimes and Mixings of B Hadrons at the Tevatron
Measurements of the Masses, Lifetimes and Mixings of B Hadrons at the Tevatron

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Published: 2009

Total Pages: 5

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The Tevatron, with p{bar p} collisions at (square root)s = 1.96 TeV, can produce all flavors of B hadrons and allows for unprecedented studies in the B physics sector. The CDF and D0 collaborations have more than 5 fb−1 of data recorded. I present here a selection of recent results on the masses, lifetimes and mixings of B hadrons using between 1.0 and 2.8 fb−1 of data.

Measurement of the B-Hadron Production Cross Section Using Decays to MU- D0 X Final States in P Anti-p Collisions at S**ư
Measurement of the B-Hadron Production Cross Section Using Decays to MU- D0 X Final States in P Anti-p Collisions at S**ư

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Published: 2009

Total Pages: 26

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We report a measurement of the production cross section for b hadrons in p{bar p} collisions at √s = 1.96 TeV. Using a data sample derived from an integrated luminosity 83 pb−1 collected with the upgraded Collider Detector (CDF II) at the Fermilab Tevatron, we analyze b hadrons, H{sub b}, partially reconstructed in the semileptonic decay mode H{sub b} →?− D° X. Our measurement of the inclusive production cross section for b hadrons with transverse momentum p{sub T}> 9 GeV/c and rapidity.