The baryonic decay Lambda_b -> Lambda_c(-> Lambda pi) tau nu provides an independent probe of the R(D(*)) anomalies, with (C_VL, C_SR) as the most favored new physics solution and observables like K_1c, K_2ss showing high sensitivity.
Branching Fraction Measurements of the Rare <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi>ϕ</mml:mi><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:msubsup><mml:mi>f</mml:mi><mml:mn>2</mml:mn><mml:mo>′</mml:mo></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>1525</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> Decays
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