文摘
Measurements of CP observables in <span id="mmlsi1" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si1.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=845a95f7a1e143fdd4fb67abf499c1fe" title="Click to view the MathML source">B<sup>±sup>→DK<sup>±sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span> and <span id="mmlsi2" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si2.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=52046c0fa11b256802884b1ce14bf629" title="Click to view the MathML source">B<sup>±sup>→Dπ<sup>±sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span> decays are presented where the D meson is reconstructed in the final states <span id="mmlsi3" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si3.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=f69ab1e21983c2dece8fefdd86e8053a" title="Click to view the MathML source">K<sup>±sup>π<sup>∓sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span>, <span id="mmlsi4" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si4.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=27eb6c0a135607307b421748fd787a4b" title="Click to view the MathML source">π<sup>±sup>K<sup>∓sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span>, <span id="mmlsi5" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si5.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=7e975dfbc75b254e4a89f52cc333d126" title="Click to view the MathML source">K<sup>+sup>K<sup>−sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span>, <span id="mmlsi224" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si224.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=6de0c4bcea63b4411c02c1b74ce7c2d3" title="Click to view the MathML source">π<sup>+sup>π<sup>−sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span>, <span id="mmlsi7" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si7.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=39acb2044202955c9165521f26e50afe" title="Click to view the MathML source">K<sup>±sup>π<sup>∓sup>π<sup>+sup>π<sup>−sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span>, <span id="mmlsi8" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si8.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=0800b4757f3ae6857e60f78516d8e72b" title="Click to view the MathML source">π<sup>±sup>K<sup>∓sup>π<sup>+sup>π<sup>−sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span> and <span id="mmlsi9" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si9.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=5c2177385e081290dd82ce759c77d6cb" title="Click to view the MathML source">π<sup>+sup>π<sup>−sup>π<sup>+sup>π<sup>−sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span>. This analysis uses a sample of charged B mesons from pp collisions collected by the LHCb experiment in 2011 and 2012, corresponding to an integrated luminosity of <span id="mmlsi10" class="mathmlsrc"><span class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316302751&_mathId=si10.gif&_user=111111111&_pii=S0370269316302751&_rdoc=1&_issn=03702693&md5=efcd9d07d005b5393628b872bcd26591" title="Click to view the MathML source">3.0 fb<sup>−1sup>span><span class="mathContainer hidden"><span class="mathCode">span>span>span>. Various CP-violating effects are reported and together these measurements provide important input for the determination of the unitarity triangle angle γ. The analysis of the four-pion D decay mode is the first of its kind.