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Measurement of the ๐ถโข๐‘ƒ asymmetry in ๐ท+ โ†’ ๐œ‹+โข๐œ‹0 decays at Belle II

Journal Article · · Physical Review. D.
DOI:https://doi.org/10.1103/3kqk-ldm4· OSTI ID:3007258
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
We measure the ๐ถโข๐‘ƒ asymmetry in ๐ท+ โ†’ ๐œ‹+โข๐œ‹0 decays reconstructed in ๐‘’+โข๐‘’โˆ’ collisions at the Belle II experiment using a dataset corresponding to an integrated luminosity of 428 fbโˆ’1. A control sample of ๐ท+ โ†’ ๐œ‹+โข๐พ$$^0_๐‘†$$ decays is used to correct for detection and production asymmetries. The result ๐ด๐ถโข๐‘ƒโก(๐ท+ โ†’ ๐œ‹+โข๐œ‹0) = (โˆ’1.8 ยฑ 0.9 ยฑ 0.1)%, where the first uncertainty is statistical and the second systematic, is the most precise determination to date. It agrees with the prediction of ๐ถโข๐‘ƒ symmetry from the standard model and with results of previous measurements.
Research Organization:
Univ. of Hawaii, Honolulu, HI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC06-76RL01830; SC0007983; SC0009824; SC0009973; SC0010007; SC0010073; SC0010118; SC0010504; SC0011784; SC0012704; SC0019230; SC0021274; SC0021616; SC0022350; SC0023470
Other Award/Contract Number:
23LCG-1C011
DP200101792
DP210101900
DP210102831
DE220100462
LE210100098
LE230100085
947006
2024YFA1610503
2024YFA1610504
11575017
11761141009
11705209
11975076
12135005
12150004
12161141008
12475093
12175041
ZR2022JQ02
22-18469S
CZ.02.01.01/00/22_008/0004632
246122
PIEF-GA-2013-622527
267104
884719
819127
700525 โ€œNIOBEโ€
101026516
822070
ANR-21-CE31-0009
RTI 4002
UPES/R&D-SEED-INFRA/17052023/01
UPES/R&D-SOE/20062022/06
2476/17
2016113
3-16543
BELLE2
16H03968
16H03993
16H06492
16K05323
17H01133
17H05405
18K03621
18H03710
18H05226
19H00682
20H05850
20H05858
22H00144
22K14056
22K21347
23H05433
26220706
26400255
2021R1-F1A-1064008
2022R1-A2C-1003993
2022R1-A2C-1092335
RS-2016-NR017151
RS-2018-NR031074
RS-2021-NR060129
RS-2023-00208693
RS-2024-00354342
RS-2025-02219521
K25L2M2C3
237
S-0256-1438
S-0280-1439
RSPD2025R873
J1-50010
P1-0135
PID2022-136510NB-C33
RYC2020-029875-I
CIDEGENT/2018/020
2020.02/0257
PHY-1913789
PHY-2111604
NVCC.05.12/22-23
DL0000.02/24-25
FOINS-296
CB-221329
CB-236394
CB-254409
CB-180023
OSTI ID:
3007258
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 3 Vol. 112; ISSN 2470-0029; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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