Search Results - "K. Chilikin"
-
1
Measurement of R(D) and R(D^{}) with a Semileptonic Tagging Method
Published in Physical review letters (24-04-2020)“…The experimental results on the ratios of branching fractions R(D)=B(B[over ¯]→Dτ^{-}ν[over ¯]_{τ})/B(B[over ¯]→Dℓ^{-}ν[over ¯]_{ℓ}) and R(D^{*})=B(B[over…”
Get full text
Journal Article -
2
Measurement of the τ Lepton Polarization and R ( D ) in the Decay B ¯ → D τ − ν ¯ τ
Published in Physical review letters (26-05-2017)Get full text
Journal Article -
3
Test of Lepton-Flavor Universality in B→K^{}ℓ^{+}ℓ^{-} Decays at Belle
Published in Physical review letters (23-04-2021)“…We present a measurement of R_{K^{*}}, the branching fraction ratio B(B→K^{*}μ^{+}μ^{-})/B(B→K^{*}e^{+}e^{-}), for both charged and neutral B mesons. The ratio…”
Get full text
Journal Article -
4
Lepton-Flavor-Dependent Angular Analysis of B→K^{}ℓ^{+}ℓ^{-}
Published in Physical review letters (17-03-2017)“…We present a measurement of angular observables and a test of lepton flavor universality in the B→K^{*}ℓ^{+}ℓ^{-} decay, where ℓ is either e or μ. The analysis…”
Get full text
Journal Article -
5
Test of lepton flavor universality and search for lepton flavor violation in B → Kℓℓ decays
Published in The journal of high energy physics (01-03-2021)“…A bstract We present measurements of the branching fractions for the decays B → Kμ + μ − and B → Ke + e − , and their ratio ( R K ), using a data sample of 711…”
Get full text
Journal Article -
6
The Belle II Physics Book
Published in Progress of theoretical and experimental physics (01-12-2019)“…We present the physics program of the Belle II experiment, located on the intensity frontier SuperKEKB e+e- collider. Belle II collected its first collisions…”
Get full text
Journal Article -
7
Search for Axionlike Particles Produced in e + e − Collisions at Belle II
Published in Physical review letters (14-10-2020)“…We present a search for the direct production of a light pseudoscalar a decaying into two photons with the Belle II detector at the SuperKEKB collider. We…”
Get full text
Journal Article -
8
Search for B + → K + ν ν ¯ Decays Using an Inclusive Tagging Method at Belle II
Published in Physical review letters (29-10-2021)“…A search for the flavor-changing neutral-current decay B+ →K+$ν\bar{ν}$ is performed at the Belle II experiment at the SuperKEKB asymmetric energy…”
Get full text
Journal Article -
9
Lepton-Flavor-Dependent Angular Analysis of B → Kℓ+ℓ-
Published in Physical review letters (13-03-2017)“…Here, we present a measurement of angular observables and a test of lepton flavor universality in the B → K*ℓ+ℓ- decay, where ℓ is either e or μ . The analysis…”
Get full text
Journal Article -
10
Search for an Invisibly Decaying Z^{'} Boson at Belle II in e^{+}e^{-}→μ^{+}μ^{-}(e^{±}μ^{∓}) Plus Missing Energy Final States
Published in Physical review letters (10-04-2020)“…Theories beyond the standard model often predict the existence of an additional neutral boson, the Z^{'}. Using data collected by the Belle II experiment…”
Get full text
Journal Article -
11
Measurement of e + e − → π + π − ψ ( 2 S ) via initial state radiation at Belle
Published in Physical review. D, Particles, fields, gravitation, and cosmology (12-06-2015)“…We report here measurement of the cross section of e+e- → π+π-ψ ( 2S ) between 4.0 and 5.5 GeV, based on an analysis of initial state radiation events in a…”
Get full text
Journal Article -
12
Observation of Transverse Λ/Λ[over ¯] Hyperon Polarization in e^{+}e^{-} Annihilation at Belle
Published in Physical review letters (01-02-2019)“…We report the first observation of the spontaneous polarization of Λ and Λ[over ¯] hyperons transverse to the production plane in e^{+}e^{-} annihilation,…”
Get full text
Journal Article -
13
First Measurements of Absolute Branching Fractions of the Ξc0 Baryon at Belle
Published in Physical review letters (01-03-2019)“…We present the first measurements of absolute branching fractions of Ξc0 decays into Ξ−π+, ΛK−π+, and pK−K−π+ final states. The measurements are made using a…”
Get full text
Journal Article -
14
Observation of an Excited Ω^{-} Baryon
Published in Physical review letters (03-08-2018)“…Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω^{*-} candidate decaying into Ξ^{0}K^{-} and Ξ^{-}K_{S}^{0} with a mass of…”
Get full text
Journal Article -
15
Observation of Zb ( 10610 ) and Zb ( 10650 ) Decaying to B Mesons
Published in Physical review letters (24-05-2016)“…Observation of Z(b)(10610) and Z(b)(10650) Decaying to B Mesons…”
Get full text
Journal Article -
16
Experimental constraints on the spin and parity of the Z ( 4430 )
Published in Physical review. D, Particles, fields, gravitation, and cosmology (22-10-2013)“…Experimental constraints on the spin and parity of the Z(4430)+…”
Get full text
Journal Article -
17
Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections
Published in The journal of high energy physics (01-10-2019)“…A bstract We report a new measurement of the e + e − → ϒ( nS ) π + π − ( n = 1 , 2 , 3) cross sections at energies from 10 . 52 to 11 . 02 GeV using data…”
Get full text
Journal Article -
18
Search for Lepton-Flavor-Violating τ Decays to a Lepton and an Invisible Boson at Belle II
Published in Physical review letters (05-05-2023)“…We search for lepton-flavor-violating τ^{-}→e^{-}α and τ^{-}→μ^{-}α decays, where α is an invisible spin-0 boson. The search uses electron-positron collisions…”
Get full text
Journal Article -
19
Charged charmonium-like states in the Belle experiment
Published in Physics of atomic nuclei (01-01-2016)“…The most recent results obtained for charged charmonium-like states in the Belle experiment are presented…”
Get full text
Journal Article -
20
Observation of a new charged charmoniumlike state in B ¯ 0 → J / ψ K − π + decays
Published in Physical review. D, Particles, fields, gravitation, and cosmology (16-12-2014)“…We present the results of an amplitude analysis of B¯0→J/ψK-π+ decays. A new charged charmoniumlike state Zc(4200)+ decaying to J/ψπ+ is observed with a…”
Get full text
Journal Article