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Proposing "b-Parity" - a New Approximate Quantum Number in Inclusive b-jet Production - as an Efficient Probe of New Flavor Physics
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We consider the inclusive reaction \ell^+ \ell^- -> nb +X (n = number of b-jets) in lepton colliders for which we propose a useful approximately conserved quantum number b_P=(-1)^n that we call b-Parity (b_P). We make the observation that the Standard Model (SM) is essentially b_P-even since SM b_P-violating signals are necessarily CKM suppressed. In contrast new flavor physics can produce b_P=-1 signals whose only significant SM background is due to b-jet misidentification. Thus, we show that b-jet counting, which relies primarily on b-tagging, becomes a very simple and sensitive probe of new flavor physics (i.e., of b_P-violation).
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Cited by 2 Pith papers
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Counting b-jets at the FCC-ee as a probe of top-quark flavor physics
FCC-ee at 240 GeV can probe Λ_eff ∼ 7–13 TeV for scalar, vector and tensor eetu/eetc operators by counting b_P-odd single-b-jet multi-jet events.
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Flavor physics at the EIC with b-jet tagging
Single b-jet counting in charged-current events at the EIC could probe new flavor-changing physics up to Λ_eff ≈ 5 TeV, about 30 times the collider energy, assuming tight b-tagging and polarized beams.
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