期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.081801
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资金
- DOE
- NSF (USA)
- CEA
- CNRS/IN2P3 (France)
- FASI
- Rosatom and RFBR (Russia)
- CNPq
- FAPERJ
- FAPESP
- FUNDUNESP (Brazil)
- DAE
- DST (India)
- Colciencias (Colombia)
- CONACyT (Mexico)
- KRF and KOSEF (Korea)
- CONICET
- UBACyT (Argentina)
- FOM (The Netherlands)
- STFC
- Royal Society (U.K.)
- MSMT
- GACR (Czech Republic)
- CRC Program
- NSERC (Canada)
- BMBF
- DFG (Germany)
- SFI (Ireland)
- Swedish Research Council (Sweden)
- CAS
- CNSF (China)
- STFC [PP/E000487/1, ST/F00754X/1, ST/H000992/1, ST/F007418/1, ST/H00095X/1, ST/H00095X/2, ST/I505756/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H00095X/2, PP/E000487/1, ST/H00095X/1, ST/F007418/1, ST/I505756/1, ST/F00754X/1, ST/H000992/1] Funding Source: researchfish
We measure the charge asymmetry A =(N(++) -N(--))/(N(++) + N(--)) of like-sign dimuon events in 6.1 fb(-1) of p (p) over bar collisions recorded with the D0 detector at a center-of-mass energy root s = 1: 96 TeV at the Fermilab Tevatron collider. From A we extract the like-sign dimuon charge asymmetry in semileptonic b-hadron decays: A(sl)(b) = -0.009 57 +/- 0.00251(stat) +/- 0.001 46(sys). It differs by 3.2 standard deviations from the standard model prediction A(sl)(b)(SM) = (-2.3(-0.6)(+0.5)) x 10(-4), and provides first evidence of anomalous CP violation in the mixing of neutral B mesons.
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