The forward-backward asymmetry and differences of partial moments in inclusive semileptonic $B$ decays

• DOI: 10.21468/scipostphys.14.2.020
• Publication Date: 2023-02-15T16:24:27Z
• Authors: Florian Herren
• Keywords: High Energy Physics - Phenomenology; High Energy Physics - Experiment (hep-ex); High Energy Physics - Phenomenology (hep-ph); Physics; QC1-999; 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; High Energy Physics - Experiment

Global fits to moments of kinematic distributions measured in inclusive semileptonic B\rightarrow X_c l \nu_l <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:msub><mml:mi>X</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mi>l</mml:mi><mml:msub><mml:mi>ν</mml:mi><mml:mi>l</mml:mi></mml:msub></mml:mrow></mml:math> enable the determination Cabibbo-Kobayashi-Maskawa matrix element \left|V_{cb}\right| display="inline"><mml:mrow><mml:mo stretchy="true" form="prefix">|</mml:mo><mml:msub><mml:mi>V</mml:mi><mml:mrow><mml:mi>c</mml:mi><mml:mi>b</mml:mi></mml:mrow></mml:msub><mml:mo form="postfix">|</mml:mo></mml:mrow></mml:math> together with non-perturbative elements heavy quark expansion. In current fits, only two distinct are employed and, as a consequence, higher these need be taken into account extract relevant elements. The given distribution highly correlated and experimental uncertainties increase for moments. To address issues, Turczyk suggested inclusion charged lepton forward-backward asymmetry \mathcal{A}_{FB} display="inline"><mml:msub><mml:mstyle mathvariant="script"><mml:mi>𝒜</mml:mi></mml:mstyle><mml:mrow><mml:mi>F</mml:mi><mml:mi>B</mml:mi></mml:mrow></mml:msub></mml:math> global since it provides information on parameters beyond commonly used It is possible construct differences partial distributions, which can provide additional studied this work first time. Further, cuts four-momentum transfer square shown preserve shape angular distribution, contrast energy. Finally, impact final-state radiation identification requirements measurements discussed.