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. 2023 Oct 27;131(17):171803.
doi: 10.1103/PhysRevLett.131.171803.

Precise Measurement of the D_{s}^{+} Lifetime at Belle II

I AdachiL AggarwalH AiharaN AkopovA AloisioN Anh KyD M AsnerH AtmacanT AushevV AushevM AversanoV BabuH BaeS BahinipatiP BambadeSw BanerjeeM BarrettJ BaudotM BauerA BaurA BeaubienJ BeckerP K BeheraJ V BennettF U BernlochnerV BertacchiM BertemesE BertholetM BessnerS BettariniB BhuyanF BianchiT BilkaD BiswasD BodrovA BondarA BozekM BračkoP BranchiniR A BriereT E BrowderA BudanoS BussinoM CampajolaL CaoG CasarosaC CecchiJ CerasoliM-C ChangP ChangP CheemaV ChekelianB G CheonK ChilikinK ChirapatpimolH-E ChoK ChoS-K ChoiS ChoudhuryJ CochranL CoronaS DasF DattolaS A De La MotteG de MarinoG De NardoM De NuccioG De PietroR de SangroM DestefanisS DeyR DhamijaA Di CantoF Di CapuaJ DingfelderZ DoležalI Domínguez JiménezT V DongM DorigoK DortS DreyerS DubeyG DujanyP EckerD EpifanovP FeichtingerD FerlewiczC FinckG FinocchiaroA FodorF FortiA FreyB G FulsomA GabrielliE GanievM Garcia-HernandezA GarmashG GaudinoV GaurA GazA GellrichG GhevondyanD GhoshH GhumaryanG GiakoustidisR GiordanoA GiriA GlazovB GobboR GodangO GogotaP GoldenzweigW GradlE GrazianiD GreenwaldZ GruberováT GuY GuanK GudkovaY HanK HayasakaH HayashiiS HazraC HeartyI Heredia de la CruzA HershenhornT HiguchiE C HillM HoekM HohmannC-L HsuT HumairT IijimaK InamiN IpsitaA IshikawaS ItoR ItohM IwasakiP JacksonW W JacobsD E JaffeE-J JangQ P JiS JiaY JinH JunkerkalefeldA B KaliyarJ KandraG KaryanT KawasakiF KeilC KetterC KieslingC-H KimD Y KimK-H KimY-K KimH KindoK KinoshitaP KodyšT KogaS KohaniK KojimaA KorobovS KorparR KowalewskiT M G KraetzschmarP KrižanP KrokovnyT KuhrJ KumarM KumarR KumarK KumaraA KuzminY-J KwonS LacapraraY-T LaiT LamJ S LangeM LaurenzaR LeboucherF R Le DiberderP LeitlD LevitP M LewisL K LiJ LibbyQ Y LiuZ Q LiuD LiventsevS LongoT LueckC LyuY MaM MaggioraS P MaharanaR MaitiS MaityR ManfrediE ManoniM MantovanoD MarcantonioS MarcelloC MarinasC MartelliniA MartiniT MartinovL MassaccesiM MasudaT MatsudaK MatsuokaD MatvienkoS K MauryaJ A McKennaR MehtaF MeierM MerolaF MetznerM MilesiC MillerM MirraK MiyabayashiG B MohantyN Molina-GonzalezS MondalS MonetaH-G MoserM MrvarR MussaI NakamuraY NakazawaA Narimani CharanM NarukiZ NatkaniecA NatochiiL NayakG NazaryanN K NisarS NishidaH OnoF OtaniE R OxfordP PakhlovG PakhlovaA PaladinoA PantaE PaoloniS PardiA PasseriS PatraS PaulT K PedlarI PeruzziR PeschkeR PestotnikF PhamM PiccoloL E PiilonenT PodobnikS PokharelC PrazS PrellE PrencipeM T PrimH PurwarP RadosG RaeuberS RaizM ReifS ReiterM RemnevI Ripp-BaudotG RizzoJ M RoneyA RostomyanN RoutG RussoS SandilyaA SangalL SanteljY SatoV SavinovB ScavinoC SchmittC SchwandaA J SchwartzY SeinoA SelceK SenyoJ SerranoM E SeviorC SfientiW ShanX D ShiT ShillingtonJ-G ShiuD ShtolA SibidanovF SimonR J SobieM SobotzikA SofferA SokolovE SolovievaS SpataroB SpruckM StaričP StavroulakisZ S StottlerR StroiliM SumihamaH SvidrasM TakahashiM TakizawaU TamponiK TanidaF TenchiniO TittelD TonelliE TorassaK TrabelsiI TsaklidisK UngerY UnnoK UnoS UnoP UrquijoY UshirodaS E VahsenR van TonderK E VarvellM VeronesiV S VismayaL VitaleR VolpeB WachS WallnerE WangM-Z WangX L WangZ WangA WarburtonM WatanabeC WesselE WonX P XuB D YabsleyS YamadaW YanS B YangK YoshiharaC Z YuanY YusaY ZhangV ZhilichJ S ZhouQ D ZhouV I ZhukovaR ŽlebčíkBelle II Collaboration

Precise Measurement of the D_{s}^{+} Lifetime at Belle II

I Adachi et al. Phys Rev Lett. .

Abstract

We measure the lifetime of the D_{s}^{+} meson using a data sample of 207 fb^{-1} collected by the Belle II experiment running at the SuperKEKB asymmetric-energy e^{+}e^{-} collider. The lifetime is determined by fitting the decay-time distribution of a sample of 116×10^{3} D_{s}^{+}→ϕπ^{+} decays. Our result is τ_{D_{s}^{+}}=(499.5±1.7±0.9) fs, where the first uncertainty is statistical and the second is systematic. This result is significantly more precise than previous measurements.

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