B physics at the Z<sup>0</sup>resonance

Hawkings, R. J.; Willocq, S.

doi:10.1088/0954-3899/27/6/320

Cited by 5 publications

(9 citation statements)

References 44 publications

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“…This can be seen explicitly from Eqs. ( 28) and (30). Furthermore, if |D ′ | 2− = 0, i.e., if the New Physics contributions to C ′ 7 and C ′ 8 have a common weak phase, then…”

Section: Estimates Of Nlo Effectsmentioning

confidence: 99%

“…Proposals exist for a so-called GigaZ option with 2•10 9 Z bosons per year [28,29], corresponding to approximately 3.5 • 10 7 b-flavored baryon decays. For recent discussions of the b physics potential at a Z factory see [30]. With a branching fraction estimate B(Λ b → Λγ) ≃ 7.5 • 10 −5 we expect approximately 2600 exclusive Λ b → Λγ decays per year.…”

Section: Introductionmentioning

confidence: 99%

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Probing for New Physics in Polarized Lambda{sub b} Decays at the Z

Hiller¹

2001

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Polarized Λ b → Λγ decays at the Z pole are shown to be well suited for probing a large variety of New Physics effects. A new observable is proposed, the angular asymmetry between the Λ b spin and photon momentum, which is sensitive to the relative strengths of the opposite chirality and Standard Model chirality b → sγ dipole operators. Combination with the Λ decay polarization asymmetry and comparison with the Λ b polarization extracted from semileptonic decays allows important tests of the V − A structure of the Standard Model. Modifications of the rates and angular asymmetries which arise at next-to-leading order are discussed. Measurements for Λ b → Λγ and the CP conjugate mode, with branching ratios of a few times 10 −5 , are shown to be sensitive to non-standard sources of CP violation in the Λ b → Λγ matrix element. Form factor relations for heavy-to-light baryon decays are derived in the large energy limit, which are of general interest.

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“…This can be seen explicitly from Eqs. ( 28) and (30). Furthermore, if |D ′ | 2− = 0, i.e., if the New Physics contributions to C ′ 7 and C ′ 8 have a common weak phase, then…”

Section: Estimates Of Nlo Effectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Probing for New Physics in Polarized Lambda{sub b} Decays at the Z

Hiller¹

2001

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“…Improvements continue to be made in the experimental search for B 0 s oscillations. Combining LEP, SLD and CDF analyses yields a lower limit of m s > 15.0 ps −1 at 95% CL [9]. This limit puts stringent constraints on the unitarity triangle; for instance, it essentially eliminates all values of the CP-violating phase γ greater than 90 • .…”

Section: B Mixingmentioning

confidence: 97%

“…Measurements of b hadron lifetimes at LEP, CDF and SLD were covered by Hawkings and Willocq [9]; these measurements are mature and yield the following world averages:…”

Section: B Lifetimesmentioning

confidence: 99%