Search for K_{L}→π^{0}νν[over ¯] and K_{L}→π^{0}X^{0} Decays at the J-PARC KOTO Experiment.

Journal

Physical review letters
ISSN: 1079-7114
Titre abrégé: Phys Rev Lett
Pays: United States
ID NLM: 0401141

Informations de publication

Date de publication:
18 Jan 2019
Historique:
revised: 14 12 2018
received: 23 10 2018
entrez: 6 2 2019
pubmed: 6 2 2019
medline: 6 2 2019
Statut: ppublish

Résumé

A search for the rare decay K_{L}→π^{0}νν[over ¯] was performed. With the data collected in 2015, corresponding to 2.2×10^{19} protons on target, a single event sensitivity of (1.30±0.01_{stat}±0.14_{syst})×10^{-9} was achieved and no candidate events were observed. We set an upper limit of 3.0×10^{-9} for the branching fraction of K_{L}→π^{0}νν[over ¯] at the 90% confidence level (C.L.), which improved the previous limit by almost an order of magnitude. An upper limit for K_{L}→π^{0}X^{0} was also set as 2.4×10^{-9} at the 90% C.L., where X^{0} is an invisible boson with a mass of 135  MeV/c^{2}.

Identifiants

DOI: 10.1103/PhysRevLett.122.021802 PMID: 30720307
pubmed: 30720307
doi: 10.1103/PhysRevLett.122.021802
doi:

Types de publication

Journal Article

Langues

eng

Pagination

021802

Auteurs

J K Ahn (JK)

Department of Physics, Korea University, Seoul 02841, Republic of Korea.

B Beckford (B)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

J Beechert (J)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

K Bryant (K)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

M Campbell (M)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

S H Chen (SH)

Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China.

J Comfort (J)

Department of Physics, Arizona State University, Tempe, Arizona 85287, USA.

K Dona (K)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

N Hara (N)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

H Haraguchi (H)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

Y B Hsiung (YB)

Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China.

M Hutcheson (M)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

T Inagaki (T)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.

I Kamiji (I)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

N Kawasaki (N)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

E J Kim (EJ)

Division of Science Education, Chonbuk National University, Jeonju 54896, Republic of Korea.

J L Kim (JL)

Department of Physics, Korea University, Seoul 02841, Republic of Korea.

Y J Kim (YJ)

Department of Physics, Jeju National University, Jeju 63243, Republic of Korea.

J W Ko (JW)

Department of Physics, Jeju National University, Jeju 63243, Republic of Korea.

T K Komatsubara (TK)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
J-PARC Center, Tokai, Ibaraki 319-1195, Japan.

K Kotera (K)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

A S Kurilin (AS)

Laboratory of Nuclear Problems, Joint Institute for Nuclear Researches, Dubna, Moscow region 141980, Russia.

J W Lee (JW)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

G Y Lim (GY)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
J-PARC Center, Tokai, Ibaraki 319-1195, Japan.

C Lin (C)

Department of Physics, National Taiwan University, Taipei, Taiwan 10617, Republic of China.

Q Lin (Q)

Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.

Y Luo (Y)

Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.

J Ma (J)

Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.

Y Maeda (Y)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

T Mari (T)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

T Masuda (T)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

T Matsumura (T)

Department of Applied Physics, National Defense Academy, Kanagawa 239-8686, Japan.

D Mcfarland (D)

Department of Physics, Arizona State University, Tempe, Arizona 85287, USA.

N McNeal (N)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

J Micallef (J)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

K Miyazaki (K)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

R Murayama (R)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

D Naito (D)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

K Nakagiri (K)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

H Nanjo (H)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

H Nishimiya (H)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

T Nomura (T)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
J-PARC Center, Tokai, Ibaraki 319-1195, Japan.

M Ohsugi (M)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

H Okuno (H)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.

M Sasaki (M)

Department of Physics, Yamagata University, Yamagata 990-8560, Japan.

N Sasao (N)

Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan.

K Sato (K)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

T Sato (T)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.

Y Sato (Y)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

H Schamis (H)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

S Seki (S)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

N Shimizu (N)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

T Shimogawa (T)

Department of Physics, Saga University, Saga 840-8502, Japan.

T Shinkawa (T)

Department of Applied Physics, National Defense Academy, Kanagawa 239-8686, Japan.

S Shinohara (S)

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

K Shiomi (K)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
J-PARC Center, Tokai, Ibaraki 319-1195, Japan.

S Su (S)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

Y Sugiyama (Y)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

S Suzuki (S)

Department of Physics, Saga University, Saga 840-8502, Japan.

Y Tajima (Y)

Department of Physics, Yamagata University, Yamagata 990-8560, Japan.

M Taylor (M)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

M Tecchio (M)

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

M Togawa (M)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

Y C Tung (YC)

Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.

Y W Wah (YW)

Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.

H Watanabe (H)

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan.
J-PARC Center, Tokai, Ibaraki 319-1195, Japan.

J K Woo (JK)

Department of Physics, Jeju National University, Jeju 63243, Republic of Korea.

T Yamanaka (T)

Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.

H Y Yoshida (HY)

Department of Physics, Yamagata University, Yamagata 990-8560, Japan.

Classifications MeSH