First observation of the decay Dp>0 p> p>→ p>Kp>− p>πp>+ p>μp>+ p>μp>− p> in the ρp>0 p>-ω region of the dimuon mass spectrum
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- 作者：LHCb CollaborationR. Aaij
- 刊名：Physics Letters B
- 出版年：2016
- 出版时间：10 June 2016
- 年：2016
- 卷：757
- 期：Complete
- 页码：558-567
- 全文大小：698 K
文摘
A study of the decay pan id="mmlsi1" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301022&_mathId=si1.gif&_user=111111111&_pii=S0370269316301022&_rdoc=1&_issn=03702693&md5=a27d90cd9ed1c8a9305ee68cb10567d6" title="Click to view the MathML source">Dp>0 p>→Kp>− p>πp>+ p>μp>+ p>μp>− p> pan>pan class="mathContainer hidden">pan class="mathCode"><math altimg="si1.gif" overflow="scroll"><msup><mrow><mi>Dmi>mrow><mrow><mn>0mn>mrow>msup><mo stretchy="false">→mo><msup><mrow><mi>Kmi>mrow><mrow><mo>−mo>mrow>msup><msup><mrow><mi>πmi>mrow><mrow><mo>+mo>mrow>msup><msup><mrow><mi>μmi>mrow><mrow><mo>+mo>mrow>msup><msup><mrow><mi>μmi>mrow><mrow><mo>−mo>mrow>msup>math> pan> pan> pan> is performed using data collected by the LHCb detector in proton–proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of pan id="mmlsi2" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301022&_mathId=si2.gif&_user=111111111&_pii=S0370269316301022&_rdoc=1&_issn=03702693&md5=aa553350039047030cfe0c9c588b103c" title="Click to view the MathML source">2.0 fbp>−1 p> pan>pan class="mathContainer hidden">pan class="mathCode"><math altimg="si2.gif" overflow="scroll"><mn>2.0mn><msup><mrow><mtext> fbmtext>mrow><mrow><mo>−mo><mn>1mn>mrow>msup>math> pan> pan> pan>. Decay candidates with muon pairs that have an invariant mass in the range pan id="mmlsi102" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301022&_mathId=si102.gif&_user=111111111&_pii=S0370269316301022&_rdoc=1&_issn=03702693&md5=9ca79b3c364a17f07386b953b9201081" title="Click to view the MathML source">675–875 MeV/cp>2 p> pan>pan class="mathContainer hidden">pan class="mathCode"><math altimg="si102.gif" overflow="scroll"><mn>675mn><mtext>–mtext><mn>875mn><mtext> MeVmtext><mo stretchy="false">/mo><msup><mrow><mi>cmi>mrow><mrow><mn>2mn>mrow>msup>math> pan> pan> pan> are considered. This region is dominated by the pan id="mmlsi11" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301022&_mathId=si11.gif&_user=111111111&_pii=S0370269316301022&_rdoc=1&_issn=03702693&md5=ed6c8ea4c95c2a6afc807fff99e1cc17" title="Click to view the MathML source">ρp>0 p> pan>pan class="mathContainer hidden">pan class="mathCode"><math altimg="si11.gif" overflow="scroll"><msup><mrow><mi>ρmi>mrow><mrow><mn>0mn>mrow>msup>math> pan> pan> pan> and m>ω m> resonances. The branching fraction in this range is measured to bepan id="mmlsi1" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316301022&_mathId=si1.gif&_user=111111111&_pii=S0370269316301022&_rdoc=1&_issn=03702693&md5=a27d90cd9ed1c8a9305ee68cb10567d6" title="Click to view the MathML source">Dp>0 p>→Kp>− p>πp>+ p>μp>+ p>μp>− p> pan>pan class="mathContainer hidden">pan class="mathCode"><math altimg="si1.gif" overflow="scroll"><msup><mrow><mi>Dmi>mrow><mrow><mn>0mn>mrow>msup><mo stretchy="false">→mo><msup><mrow><mi>Kmi>mrow><mrow><mo>−mo>mrow>msup><msup><mrow><mi>πmi>mrow><mrow><mo>+mo>mrow>msup><msup><mrow><mi>μmi>mrow><mrow><mo>+mo>mrow>msup><msup><mrow><mi>μmi>mrow><mrow><mo>−mo>mrow>msup>math> pan> pan> pan>. Its branching fraction is consistent with the value expected in the Standard Model.
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