The time-dependent CP asymmetry in $B^{0}\\!\\to{J\\mskip-3mu\/\\mskip-2mu\\psi}\\rho(770)^0$ decays is measured using proton-proton collision data corresponding to an integrated luminosity of 6 $\\text{fb}^{-1}$, collected with the LHCb detector at a center-of-mass energy of 13 $\\text{TeV}$ during the years 2015-2018. The CP-violation parameters for this process are determined to be $2\\beta^{\\rm eff}_{c\\bar{c}d} = 0.710 \\pm 0.084 \\pm 0.051\\,\\text{rad}$ and $|\\lambda| = 1.019 \\pm 0.034 \\pm 0.024$, where the first uncertainty is statistical and the second systematic. This constitutes the first observation of time-dependent CP violation in $B^{0}\\!\\to{J\\mskip-3mu\/\\mskip-2mu\\psi}\\rho(770)^0$ decays. Assuming approximate SU(3) flavor symmetry, these results are combined with the previous consistent LHCb measurement to set the most stringent constraint on the penguin contribution, $\\Delta\\phi_{s}$, to the CP-violating phase $\\phi_{s}$ in $B^{0}_{s}\\!\\to{J\\mskip-3mu\/\\mskip-2mu\\psi}\\phi(1020)$ decays, yielding $\\Delta\\phi_{s} = 5.0 \\pm 4.6\\,\\text{mrad}$.<\/p>\n","protected":false},"excerpt":{"rendered":"
The time-dependent CP asymmetry in $B^{0}\\!\\to{J\\mskip-3mu\/\\mskip-2mu\\psi}\\rho(770)^0$ decays is measured using proton-proton collision data corresponding to an integrated luminosity of 6 $\\text{fb}^{-1}$, collected with the LHCb detector at a center-of-mass energy of 13 $\\text{TeV}$ during the years 2015-2018. The CP-violation parameters for this process are determined to be $2\\beta^{\\rm eff}_{c\\bar{c}d} = 0.710 \\pm 0.084 \\pm 0.051\\,\\text{rad}$ and $|\\lambda| = 1.019 \\pm 0.034 \\pm 0.024$, where the first uncertainty is statistical and […]<\/p>\n","protected":false},"author":14,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"publication-type":[30],"class_list":["post-40919","publication","type-publication","status-publish","hentry","publication-type-article"],"acf":[],"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/40919","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication"}],"about":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/types\/publication"}],"author":[{"embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/users\/14"}],"version-history":[{"count":0,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication\/40919\/revisions"}],"wp:attachment":[{"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/media?parent=40919"}],"wp:term":[{"taxonomy":"publication-type","embeddable":true,"href":"https:\/\/lamarr-institute.org\/de\/wp-json\/wp\/v2\/publication-type?post=40919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}