Baryonic<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" id="M1"><a:mi>B</a:mi></a:math>Meson Decays
Xiaotao Huang, Y. K. Hsiao, Jike Wang, L. Sun
Abstract
We review the two- and three-body baryonic <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" id="M2"><a:mi>B</a:mi></a:math> decays with the dibaryon ( <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" id="M3"><c:mi mathvariant="bold">B</c:mi><c:mover accent="true"><c:mrow><c:mi mathvariant="bold">B</c:mi><c:mo>′</c:mo></c:mrow><c:mo stretchy="true">¯</c:mo></c:mover></c:math> ) as the final states. Accordingly, we summarize the experimental data of the branching fractions, angular asymmetries, and <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" id="M4"><i:mtext>CP</i:mtext></i:math> asymmetries. Using the <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" id="M5"><k:mi>W</k:mi></k:math> -boson annihilation (exchange) mechanism, the branching fractions of <m:math xmlns:m="http://www.w3.org/1998/Math/MathML" id="M6"><m:mi>B</m:mi><m:mo>⟶</m:mo><m:mi mathvariant="bold">B</m:mi><m:mover accent="true"><m:mrow><m:mi mathvariant="bold">B</m:mi><m:mo>′</m:mo></m:mrow><m:mo stretchy="true">¯</m:mo></m:mover></m:math> are shown to be interpretable. In the approach of perturbative QCD counting rules, we study the three-body decay channels. In particular, we review the <s:math xmlns:s="http://www.w3.org/1998/Math/MathML" id="M7"><s:mtext>CP</s:mtext></s:math> asymmetries of <u:math xmlns:u="http://www.w3.org/1998/Math/MathML" id="M8"><u:mi>B</u:mi><u:mo>⟶</u:mo><u:mi mathvariant="bold">B</u:mi><u:mover accent="true"><u:mrow><u:mi mathvariant="bold">B</u:mi><u:mo>′</u:mo></u:mrow><u:mo stretchy="true">¯</u:mo></u:mover><u:mi>M</u:mi></u:math> , which are promising to be measured by the LHCb and Belle II experiments. Finally, we remark the theoretical challenges in interpreting <ab:math xmlns:ab="http://www.w3.org/1998/Math/MathML" id="M9"><ab:mi mathvariant="script">B</ab:mi><ab:mfenced open="(" close=")"><ab:mrow><ab:msup><ab:mrow><ab:mi>B</ab:mi></ab:mrow><ab:mrow><ab:mo>−</ab:mo></ab:mrow></ab:msup><ab:mo>⟶</ab:mo><ab:mi>p</ab:mi><ab:mover accent="true"><ab:mi>p</ab:mi><ab:mo stretchy="true">¯</ab:mo></ab:mover><ab:msup><ab:mrow><ab:mi>ρ</ab:mi></ab:mrow><ab:mrow><ab:mo>−</ab:mo></ab:mrow></ab:msup></ab:mrow></ab:mfenced></ab:math> and <hb:math xmlns:hb="http://www.w3.org/1998/Math/MathML" id="M10"><hb:mi mathvariant="script">B</hb:mi><hb:mfenced open="(" close=")"><hb:mrow><hb:msup><hb:mrow><hb:mi>B</hb:mi></hb:mrow><hb:mrow><hb:mo>−</hb:mo></hb:mrow></hb:msup><hb:mo>⟶</hb:mo><hb:mi>p</hb:mi><hb:mover accent="true"><hb:mi>p</hb:mi><hb:mo stretchy="true">¯</hb:mo></hb:mover><hb:msup><hb:mrow><hb:mi>μ</hb:mi></hb:mrow><hb:mrow><hb:mo>−</hb:mo></hb:mrow></hb:msup><hb:msub><hb:mrow><hb:mover accent="true"><hb:mi>ν</hb:mi><hb:mo stretchy="true">¯</hb:mo></hb:mover></hb:mrow><hb:mrow><hb:mi>μ</hb:mi></hb:mrow></hb:msub></hb:mrow></hb:mfenced></hb:math> .