학술논문

An improved search for the electric dipole moment of the τ lepton
Document Type
article
Author
The BELLE collaborationK. InamiK. HayasakaI. AdachiH. AiharaS. Al SaidD. M. AsnerV. AulchenkoT. AushevR. AyadV. BabuS. BahinipatiP. BeheraM. BessnerB. BhuyanT. BilkaJ. BiswalA. BobrovG. BonviciniA. BozekM. BračkoT. E. BrowderM. CampajolaD. ČervenkovB. G. CheonK. ChilikinH. E. ChoK. ChoY. ChoiS. ChoudhuryD. CinabroS. CunliffeS. DasG. De NardoR. DhamijaF. Di CapuaZ. DoležalT. V. DongS. DubeyS. EidelmanD. EpifanovT. FerberB. G. FulsomR. GargV. GaurN. GabyshevA. GarmashA. GiriP. GoldenzweigB. GolobD. GreenwaldK. GudkovaC. HadjivasiliouO. HartbrichH. HayashiiM. T. HedgesW.-S. HouC.-L. HsuT. IijimaG. IngugliaA. IshikawaR. ItohM. IwasakiY. IwasakiW. W. JacobsE.-J. JangY. JinC. W. JooK. K. JooY. KatoT. KawasakiH. KichimiC. KieslingC. H. KimD. Y. KimS. H. KimY.-K. KimT. D. KimmelK. KinoshitaP. KodyšT. KonnoS. KorparP. KrižanR. KroegerP. KrokovnyR. KulasiriM. KumarR. KumarK. KumaraY.-J. KwonK. LalwaniJ. S. LangeS. C. LeeC. H. LiJ. LiL. K. LiY. B. LiL. Li GioiJ. LibbyD. LiventsevC. MacQueenM. MasudaT. MatsudaD. MatvienkoM. MerolaF. MetznerK. MiyabayashiR. MizukG. B. MohantyS. MohantyT. J. MoonM. NakaoA. NatochiiL. NayakM. NayakN. K. NisarS. NishidaS. OgawaH. OnoY. OnukiP. OskinP. PakhlovG. PakhlovaS. PardiS.-H. ParkS. PaulT. K. PedlarR. PestotnikL. E. PiilonenT. PodobnikV. PopovE. PrencipeM. T. PrimA. RabusovM. RöhrkenA. RostomyanN. RoutG. RussoD. SahooS. SandilyaA. SangalL. SanteljT. SanukiV. SavinovG. SchnellC. SchwandaY. SeinoK. SenyoM. E. SeviorM. ShapkinC. SharmaJ.-G. ShiuB. ShwartzF. SimonE. SolovievaM. StaričZ. S. StottlerJ. F. StrubeK. SumisawaW. SutcliffeM. TakizawaU. TamponiK. TanidaY. TaoF. TenchiniK. TrabelsiM. UchidaS. UeharaS. UnoY. UshirodaR. Van TonderG. VarnerA. VinokurovaC. H. WangE. WangP. WangM. WatanabeS. WatanukiE. WonX. XuB. D. YabsleyW. YanS. B. YangH. YeJ. H. YinY. YusaZ. P. ZhangV. ZhilichV. Zhukova
Source
Journal of High Energy Physics, Vol 2022, Iss 4, Pp 1-17 (2022)
Subject
e +-e − Experiments
Tau Physics
Nuclear and particle physics. Atomic energy. Radioactivity
QC770-798
Language
English
ISSN
1029-8479
Abstract
Abstract We report a measurement of the electric dipole moment of the τ lepton (dτ) using an 833 fb −1 data sample collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e + e − collider. Using an optimal observable method, we obtain the real and imaginary parts of d τ as Re(d τ ) = (−0.62 ± 0.63) × 10 −17 ecm and Im(d τ ) = (−0.40 ± 0.32) × 10 −17 ecm, respectively. These results are consistent with null electric dipole moment at the present level of experimental sensitivity and improve the sensitivity by about a factor of three.