Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 6, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP06(2021)177
Keywords
B physics; Branching fraction; Hadron-Hadron scattering (experiments); Polarization
Categories
Funding
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- MOST (China)
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- MPG (Germany)
- INFN (Italy)
- NWO (Netherlands)
- MNiSW (Poland)
- NCN (Poland)
- MEN/IFA (Romania)
- MSHE (Russia)
- MICINN (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NASU (Ukraine)
- STFC (U.K.)
- DOE NP (U.S.A.)
- NSF (U.S.A.)
- ARC (Australia)
- ARDC (Australia)
- AvH Foundation (Germany)
- Marie Sklodowska-Curie Actions (European Union)
- ERC (European Union)
- Region Auvergne-Rhone-Alpes (France)
- Key Research Program of Frontier Sciences of CAS (China)
- CAS PIFI (China)
- CAS CCEPP (China)
- Fundamental Research Funds for the Central Universities (China)
- Sci. & Tech. Program of Guangzhou (China)
- RFBR (Russia)
- RSF (Russia)
- Yandex LLC (Russia)
- Leverhulme Trust (U.K.)
- CERN
- A*MIDEX (France)
- ANR (France)
- IPhU and Labex P2IO (France)
- EPLANET (European Union)
- GVA (Spain)
- XuntaGal (Spain)
- GENCAT (Spain)
- Royal Society (U.K.)
- UKRI (U.K.)
- Science and Technology Facilities Council [ST/S000879/1] Funding Source: researchfish
Ask authors/readers for more resources
The first complete angular analysis of the B0 -> D-Ds+ decay was conducted with high precision, revealing alignment with theoretical expectations in terms of polarization fraction and helicity amplitude magnitudes. Additionally, the previously undiscovered Cabibbo-suppressed B-s -> D(*-)Ds+ decay was observed for the first time.
The first full angular analysis of the B0 -> D-Ds+ decay is performed using 6 fb(-1) of pp collision data collected with the LHCb experiment at a centre-of-mass energy of 13 TeV. The Ds+-> Ds+gamma and D*- -> D0- vector meson decays are used with the subsequent Ds+ -> K+K-pi (+) and D0 -> K+pi (-) decays. All helicity amplitudes and phases are measured, and the longitudinal polarisation fraction is determined to be f(L) = 0.578 +/- 0.010 +/- 0.011 with world-best precision, where the first uncertainty is statistical and the second is systematic. The pattern of helicity amplitude magnitudes is found to align with expectations from quark-helicity conservation in B decays. The ratio of branching fractions [B(B0 -> D-Ds+) x B(Ds+-> Ds+gamma)]/B(B-0 -> D(*-)Ds+) is measured to be 2.045 +/- 0.022 +/- 0.071 with world-best precision. In addition, the first observation of the Cabibbo-suppressed B-s -> D(*-)Ds+ decay is made with a significance of seven standard deviations. The branching fraction ratio B(B-s -> D(*-)Ds+)/B(B-0 -> D(*-)Ds+) is measured to be 0.049 +/- 0.006 +/- 0.003 +/- 0.002, where the third uncertainty is due to limited knowledge of the ratio of fragmentation fractions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available