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FORWARD-BACKWARD ASYMMETRIES

The forward-backward assymmetry is defined as A$_{FB}({{\mathit \Lambda}_{{b}}^{0}}$) = [ N(F) $−$ N(B)] $/$ [N(F) + N(B) ], where the forward (F) direction corresponds to a particle (${{\mathit \Lambda}_{{b}}^{0}}$ or ${{\mathit \Lambda}_{{b}}^{-}}$) sharing valence quark flavors with a beam particle with the same sign of rapidity.

A${}^{{{\mathit \ell}}h}_{FB}$ in ${{\mathit \Lambda}_{{b}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

INSPIRE   PDGID:

S040A18

VALUE DOCUMENT ID TECN  COMMENT $0.25$ $\pm0.04$ $\pm0.01$ 1 AAIJ 2018 AP LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV 1  The measurement covers 15.0 $<$ q${}^{2}$ $<$ 20.0 GeV${}^{2}$/c${}^{4}$.

References:

AAIJ 2018AP JHEP 1809 146 Angular moments of the decay $\Lambda_b^0 \rightarrow \Lambda \mu^{+} \mu^{-}$ at low hadronic recoil

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