Search for dinucleon decay into kaons in Super-Kamiokande.

نویسندگان

M Litos

K Abe

Y Hayato

T Iida

M Ikeda

K Iyogi

J Kameda

K Kobayashi

Y Koshio

Y Kozuma

M Miura

S Moriyama

M Nakahata

S Nakayama

Y Obayashi

H Ogawa

H Sekiya

M Shiozawa

Y Suzuki

A Takeda

Y Takenaga

Y Takeuchi

K Ueno

K Ueshima

H Watanabe

S Yamada

T Yokozawa

S Hazama

C Ishihara

H Kaji

T Kajita

K Kaneyuki

T McLachlan

K Okumura

Y Shimizu

N Tanimoto

M R Vagins

E Kearns

J L Stone

L R Sulak

F Dufour

J L Raaf

B Henning

M Goldhaber

K Bays

D Casper

J P Cravens

W R Kropp

S Mine

C Regis

M B Smy

H W Sobel

K S Ganezer

J Hill

W E Keig

J S Jang

J Y Kim

I T Lim

J B Albert

T Wongjirad

R Wendell

K Scholberg

C W Walter

S Tasaka

J G Learned

S Matsuno

Y Watanabe

T Hasegawa

T Ishida

T Ishii

T Kobayashi

T Nakadaira

K Nakamura

K Nishikawa

H Nishino

Y Oyama

K Sakashita

T Sekiguchi

T Tsukamoto

A T Suzuki

A Minamino

T Nakaya

Y Fukuda

Y Itow

G Mitsuka

T Tanaka

C K Jung

G Lopez

C McGrew

R Terri

C Yanagisawa

N Tamura

H Ishino

A Kibayashi

S Mino

T Mori

M Sakuda

H Toyota

Y Kuno

M Yoshida

S B Kim

B S Yang

T Ishizuka

H Okazawa

Y Choi

K Nishijima

Y Yokosawa

M Koshiba

M Yokoyama

Y Totsuka

S Chen

Y Heng

Z Yang

H Zhang

D Kielczewska

P Mijakowski

K Connolly

M Dziomba

E Thrane

R J Wilkes

چکیده

A search for the dinucleon decay pp → K+ K+ has been performed using 91.6 kton·yr data from Super-Kamiokande-I. This decay provides a sensitive probe of the R-parity-violating parameter λ112''. A boosted decision tree analysis found no signal candidates in the data. The expected background was 0.28±0.19 atmospheric neutrino induced events and the estimated signal detection efficiency was 12.6%±3.2%. A lower limit of 1.7×10(32) years has been placed on the partial lifetime of the decay O16 → C14K+ K+ at 90% C.L. A corresponding upper limit of 7.8×10(-9) has been placed on the parameter λ112''.

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