K. Yoshihara

activity

20162026

collaborators

6 papers

hep-ex2026

Charged-lepton identification at Belle~II

Belle II Collaboration, M. Abumusabh, I. Adachi +409

Effective particle identification capabilities are a strategic priority for the physics program of the Belle~II experiment. We describe the algorithms used at Belle~II for identify…

hep-ex2026

First evidence of $X (3872) \to π^{0} χ_{c 0} (1 P)$ and search for $X (3915) \to π^{0} χ_{c 1} (1 P)$

Belle, Belle II Collaborations, : +412

We search for the pionic transitions $X (3872) \to π^{0} χ_{c J} (1 P)$ $(J = 0, 1, 2)$ and $X (3915) \to π^{0} χ_{c 1}$ in $B^{+} \to π^{0} χ_{c J} K^{+}$ decays using the Belle and Belle~II data samples c…

hep-ex2026

Measurement of mixing-induced CP violation in the decay $B^{0} \to π^{0} π^{0}$

Belle II Collaboration, M. Abumusabh, I. Adachi +437

Measurements of charge-parity (CP) violation in quark transitions provide stringent tests of the current theory and sensitive probes of particles or interactions beyond it. We repo…

math.GT2022

Generating the mapping class group of a non-orientable punctured surface by involutions

Kazuya Yoshihara

Let $N_{g, n}$ denote the closed non-orientable surface of genus $g$ with $n$ punctures and let $N_{g, n}$ denote the mapping class group of $N_{g, n}$ . Szepietowski showed…

math.GT2019

Generating twist subgroup of mapping class group of non-orientable surface by involutions

Kazuya Yoshihara

Let $N_{g}$ denote the closed non-orientable surface of genus $g$ and let $M_{g}$ denote the mapping class group of $N_{g}$ . Let $T_{g}$ denote the twist subgro…

math.GT2016

On stable commutator lengths of Dehn twists along separating curves

Naoyuki Monden, Kazuya Yoshihara

We give new upper bounds on the stable commutator lengths of Dehn twists along separating curves in the mapping class group of a closed oriented surface. The estimates of these upp…

Charged-lepton identification at Belle~II

First evidence of X(3872)→π0χc0​(1P) and search for X(3915)→π0χc1​(1P)

Measurement of mixing-induced CP violation in the decay B0→π0π0

Generating the mapping class group of a non-orientable punctured surface by involutions

Generating twist subgroup of mapping class group of non-orientable surface by involutions

On stable commutator lengths of Dehn twists along separating curves

First evidence of $X (3872) \to π^{0} χ_{c 0} (1 P)$ and search for $X (3915) \to π^{0} χ_{c 1} (1 P)$

Measurement of mixing-induced CP violation in the decay $B^{0} \to π^{0} π^{0}$