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Measurement of the time-integrated 𝐢⁒𝑃 asymmetry in 𝐷0 β†’ πœ‹0β’πœ‹0 decays at Belle II

Journal Article · · Physical Review. D.
DOI:https://doi.org/10.1103/vg9c-xvdc· OSTI ID:3006450
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
We measure the time-integrated 𝐢⁒𝑃 asymmetry, 𝐴𝐢⁒𝑃, in 𝐷0 β†’ πœ‹0β’πœ‹0 decays reconstructed in 𝑒+β’π‘’βˆ’ β†’ $$𝑐⁒\bar{𝑐}$$ events collected by Belle II during 2019–2022. The data corresponds to an integrated luminosity of 428 fbβˆ’1. The 𝐷0 decays are required to originate from the flavor-conserving 𝐷*+ β†’ 𝐷0β’πœ‹+ decay to determine the charm flavor at production time. Control samples of 𝐷0 β†’ πΎβˆ’β’πœ‹+ decays, with or without an associated pion from a 𝐷*+ decay, are used to correct for detection asymmetries. The result, 𝐴𝐢⁒𝑃⁑(𝐷0 β†’ πœ‹0β’πœ‹0) = (0.30 Β± 0.72 Β± 0.20)%, where the first uncertainty is statistical and the second systematic, is consistent with 𝐢⁒𝑃 symmetry.
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
12175041
ZR2022JQ02
22-18469S
PIEF-GA-2013-622527
267104
884719
819127
700525 β€œNIOBE”
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
2016R1D1A1B02012900
2018R1A2B3003643
2018R1A6A1A06024970
2019R1I1A3A01058933
2021R1A6A1A03043957
2021R1F1A1060423
2021R1F1A1064008
2022R1A2C1003993
RS-2022-00197659
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:
3006450
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 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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