학술논문

Search for B s 0 $$ {\textrm{B}}_{\textrm{s}}^0 $$ → ℓ ∓ τ ± with the semi-leptonic tagging method at Belle
Document Type
article
Author
The Belle collaborationL. NayakS. NishidaA. GiriI. AdachiH. AiharaD. M. AsnerH. AtmacanV. AulchenkoT. AushevR. AyadV. BabuS. BahinipatiS. BanerjeeM. BauerP. BeheraK. BelousJ. BennettM. BessnerB. BhuyanD. BiswasD. BodrovJ. BorahA. BozekM. BračkoP. BranchiniT. E. BrowderA. BudanoM. CampajolaD. ČervenkovM.-C. ChangB. G. CheonK. ChilikinH. E. ChoK. ChoS.-K. ChoiY. ChoiS. ChoudhuryD. CinabroJ. CochranS. DasN. DashG. De NardoG. De PietroR. DhamijaF. Di CapuaJ. DingfelderZ. DoležalT. V. DongD. DossettS. DubeyD. EpifanovT. FerberD. FerlewiczB. G. FulsomR. GargV. GaurP. GoldenzweigE. GrazianiT. GuY. GuanS. HalderT. HaraK. HayasakaH. HayashiiM. T. HedgesD. HerrmannW.-S. HouC.-L. HsuT. IijimaK. InamiG. IngugliaN. IpsitaA. IshikawaR. ItohM. IwasakiW. W. JacobsE.-J. JangS. JiaY. JinK. K. JooA. B. KaliyarT. KawasakiC. KieslingC. H. KimD. Y. KimK.-H. KimY.-K. KimK. KinoshitaP. KodyšT. KonnoA. KorobovS. KorparE. KovalenkoP. KrižanP. KrokovnyT. KuhrM. KumarR. KumarK. KumaraA. KuzminY.-J. KwonS. C. LeeJ. LiL. K. LiY. LiJ. LibbyK. LieretY.-R. LinD. LiventsevT. LuoY. MaM. MasudaT. MatsudaS. K. MauryaF. MeierM. MerolaF. MetznerK. MiyabayashiR. MizukG. B. MohantyI. NakamuraM. NakaoZ. NatkaniecA. NatochiiN. K. NisarS. OgawaH. OnoP. OskinP. PakhlovG. PakhlovaT. PangS. PardiJ. ParkS.-H. ParkA. PasseriS. PaulT. K. PedlarR. PestotnikL. E. PiilonenT. PodobnikE. PrencipeM. T. PrimA. RostomyanN. RoutG. RussoS. SandilyaA. SangalL. SanteljV. SavinovG. SchnellC. SchwandaA. J. SchwartzY. SeinoK. SenyoM. E. SeviorM. ShapkinC. SharmaJ.-G. ShiuA. SibidanovE. SolovievaM. StaričM. SumihamaT. SumiyoshiM. TakizawaK. TanidaF. TenchiniK. TrabelsiM. UchidaY. UnnoK. UnoS. UnoP. UrquijoS. E. VahsenG. VarnerK. E. VarvellA. VinokurovaD. WangM.-Z. WangS. WatanukiE. WonB. D. YabsleyW. YanJ. YeltonY. YookC. Z. YuanL. YuanY. YusaY. ZhaiZ. P. ZhangV. ZhilichV. Zhukova
Source
Journal of High Energy Physics, Vol 2023, Iss 8, Pp 1-13 (2023)
Subject
B Physics
e +-e − Experiments
Flavour Physics
Nuclear and particle physics. Atomic energy. Radioactivity
QC770-798
Language
English
ISSN
1029-8479
Abstract
Abstract We present a search for the lepton-flavor-violating decays B s 0 $$ {B}_s^0 $$ → ℓ ∓ τ ± , where ℓ = e, μ, using the full data sample of 121 fb −1 collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e + e − collider. We use B s 0 B ¯ s 0 $$ {B}_s^0{\overline{B}}_s^0 $$ events in which one B s 0 $$ {B}_s^0 $$ meson is reconstructed in a semileptonic decay mode and the other in the signal mode. We find no evidence for B s 0 $$ {B}_s^0 $$ → ℓ ∓ τ ± decays and set upper limits on their branching fractions at 90% confidence level as B $$ \mathcal{B} $$ ( B s 0 $$ {B}_s^0 $$ → e ∓ τ ± ) < 14 × 10 −4 and B $$ \mathcal{B} $$ ( B s 0 $$ {B}_s^0 $$ → μ ∓ τ ± ) < 7.3 × 10 −4. Our result represents the first upper limit on the B s 0 $$ {B}_s^0 $$ → e ∓ τ ± decay rate.