Triangle singularity in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup><mml:mo stretchy="false">→</mml:mo><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mi>X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:…
نویسندگان
چکیده
We investigate the ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{K}^{+}X(3872)$ decay via ${D}_{s1}(2536)\overline{D}{D}^{*}$ rescattering diagram. The line shape of ${K}^{+}X(3872)$ distribution curve around ${D}_{s1}(2536)\overline{D}$ threshold is very sensitive to $X(3872)$ mass because triangle singularity (TS) can be generated from loop. By means this characteristic, we determine whether below or above ${D}^{*0}{\overline{D}}^{0}$ with high precision. narrowness ${D}_{s1}(2536)$ in loop one key reasons why TS mechanism measuring may work. width impact on also crucial mechanism. If as large 1 MeV, proposed method would ruined.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.106.114002