First measurement of polarizations in the decay $D^0\to \omega \varphi$

Abstract

Using a data sample corresponding to an integrated luminosity of 2.93 fb${}^{-1}$ collected at a center-of-mass energy $\sqrt{s}=3.773$ GeV by the BESIII detector, the decay $D^0\to \omega \varphi$ is observed for the first time. The branching fraction is measured to be $(6.48\pm 0.96\pm 0.40)\times 10^{-4}$ with a significance of $6.3\sigma$, where the first and second uncertainties are statistical and systematic, respectively. An angular analysis reveals that the $\varphi$ and $\omega$ mesons from the $D^0\to \omega \varphi$ decay are transversely polarized. The $95\%$ confidence level upper limit on longitudinal polarization fraction is set to be less than $0.24$, which is inconsistent with current theoretical expectations and challenges our understanding of the underlying dynamics in charm meson decays.

arXiv comment8 pages, 3 figures, to be accepted by PRL

References in corpus (36)

• Design and Construction of the BESIII Detector
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Kernel Estimation in High-Energy Physics
• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Polarization in B->VV Decays
• SU(3) Breaking and D0-D0bar Mixing
• Rates, Polarizations, and Asymmetries in Charmless Vector-Vector B Meson Decays
• Measurement of Branching Fractions and Polarization in B -> phi K^{(*)} Decays
• Observation of B+ -> rho+ rho0
• The Riddle of Polarization in $B\to VV$ Transitions
• Final state interactions for B => VV charmless decays
• Time-Independent Measurements of D0-D0bar Mixing and Relative Strong Phases Using Quantum Correlations
• Data for Polarization in Charmless B -> phi K^*: A Signal for New Physics?
• Improved Estimates of The $B_{(s)}\to VV$ Decays in Perturbative QCD Approach
• Polarizations in decays B_{u,d}\to VV and possible implications for R-parity violating SUSY
• Measurement of the Branching Fraction For the Semi-Leptonic Decays $D^{0(+)}\to {\pi }^{-(0)}{\mu }^{+}{\nu }_{\mu }$ and Test of Lepton Flavor Universality
• Scalar interactions and the polarizations of $B\to \varphi K^{\ast }$
• Nonleptonic Two-Body Decays of D Mesons in Broken SU(3)
• (A)symmetries of weak decays at and near the kinematic endpoint
• MSSM Anatomy of the Polarization Puzzle in B --> phi K* Decays
• $D^0$-${\overline{D}}^0$ mixing parameter $y$ in the factorization-assisted topological-amplitude approach
• Long-Distance Contributions to D^0-D^0bar Mixing Parameters
• Right handed currents and FSI phases in B^0 --> ϕK^{*0}
• Measurement of e+e- --> D Dbar Cross Sections at the psi(3770) Resonance
• Observation of the Decay B0 => rho+ rho- and Measurement of the Branching Fraction and Polarization
• Two-Body Nonleptonic Decays of Charmed Mesons
• Study of CP violation in D->VV decay at BESIII
• Measurements of absolute branching fractions for $D$ mesons decays into two pseudoscalar mesons
• Study of the D^0 \to pi^-pi^+pi^-pi^+ decay
• Dalitz Plot Analysis of the Decay $\omega \to {\pi }^{+}{\pi }^{-}{\pi }^0$
• Nonleptonic two-body charmed meson decays in an effective model for their semileptonic decays
• Measurement of the $\omega \to {\pi }^{+}{\pi }^{-}{\pi }^0$ Dalitz plot distribution
• Search for invisible decays of $\omega$ and $\varphi$ with $J/\psi$ data at BESIII
• Observation of the Singly Cabibbo-Suppressed Decay $D^{+}\to \omega {\pi }^{+}$ and Evidence for $D^0\to \omega {\pi }^0$
• Extracting CP violation and strong phase in D decays by using quantum correlations in psi(3770)-> D0\bar{D}0 -> (V1V2)(V3V4) and psi(3770)->D0\bar{D}0 -> (V1V2)(K pi)
• Helicity and partial wave amplitude analysis of D -> K^* ρdecay

Cited by in corpus (1)

• Highlights of recent BESIII results