Search for double-beta decay of p>136p>Xe to excited states of p>136p>Ba with the KamLAND-Zen experiment

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• 作者：K. Asakurap>ap> ; A. Gandop>ap>p> ; p>p>azusa@awa.tohoku.ac.jp" class="auth_mail" title="E-mail the corresponding authorp> ; Y. Gandop>ap> ; T. Hachiyap>ap> ; S. Hayashidap>ap> ; H. Ikedap>ap> ; K. Inouep>ap>p> ; p>p>bp> ; K. Ishidoshirop>ap> ; T. Ishikawap>ap> ; S. Ishiop>ap> ; M. Kogap>ap>p> ; p>p>bp> ; S. Matsudap>ap> ; T. Mitsuip>ap> ; D. Motokip>ap> ; K. Nakamurap>ap>p> ; p>p>bp> ; S. Obarap>ap> ; M. Otanip>ap>p> ; p>p>1p> ; T. Ourap>ap> ; I. Shimizup>ap> ; Y. Shirahatap>ap> ; J. Shiraip>ap> ; A. Suzukip>ap> ; H. Tachibanap>ap> ; K. Tamaep>ap> ; K. Ueshimap>ap> ; H. Watanabep>ap> ; B.D. Xup>ap>p> ; p>p>2p> ; H. Yoshidap>ap>p> ; p>p>3p> ; A. Kozlovp>bp> ; Y. Takemotop>bp> ; S. Yoshidap>cp> ; K. Fushimip>dp> ; T.I. Banksp>ep> ; B.E. Bergerp>ep>p> ; p>p>bp> ; B.K. Fujikawap>ep>p> ; p>p>bp> ; T. O'Donnellp>ep> ; L.A. Winslowp>fp> ; Y. Efremenkop>gp>p> ; p>p>hp>p> ; p>p>bp> ; H.J. Karwowskip>ip> ; D.M. Markoffp>ip> ; W. Tornowp>ip>p> ; p>p>bp> ; J.A. Detwilerp>jp>p> ; p>p>bp> ; S. Enomotop>jp>p> ; p>p>bp> ; M.P. Decowskip>kp>p> ; p>p>bp>
• 关键词：Double-beta decay ; 136Xe ; Excited state
• 刊名：Nuclear Physics A
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：946
• 期：Complete
• 页码：171-181
• 全文大小：618 K

文摘

A search for double-beta decays of p>136p>Xe to excited states of p>136p>Ba has been performed with the first phase data set of the KamLAND-Zen experiment. The pan id="mmlsi1" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si1.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=3e8d6adf32ae6893e5a1f420ed8ca958">g class="imgLazyJSB inlineImage" height="19" width="20" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si1.gif"><noscript>g height="19" border="0" style="vertical-align:bottom" width="20" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si1.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>n>0n>n>1n>+p>pan>pan>pan>, pan id="mmlsi2" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si2.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=5b97f0f3fafd4b39f6e23bbc7130e681">g class="imgLazyJSB inlineImage" height="19" width="20" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si2.gif"><noscript>g height="19" border="0" style="vertical-align:bottom" width="20" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si2.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>n>2n>n>1n>+p>pan>pan>pan> and pan id="mmlsi3" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si3.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=6a73bef336671d668075caec9f321760">g class="imgLazyJSB inlineImage" height="19" width="20" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si3.gif"><noscript>g height="19" border="0" style="vertical-align:bottom" width="20" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si3.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>n>2n>n>2n>+p>pan>pan>pan> transitions of pan id="mmlsi4" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si4.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=c34b03801f7ec0e33a08a1f178821773" title="Click to view the MathML source">0νββpan>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">n>0n>νββpan>pan>pan> decay were evaluated in an exposure of pan id="mmlsi30" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si30.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=5c1df6e57827ed2dd26b0eb128d9b4a8">g class="imgLazyJSB inlineImage" height="15" width="73" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si30.gif"><noscript>g height="15" border="0" style="vertical-align:bottom" width="73" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si30.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">n>89.5n> kgpace width="0.2em">pace>⋅pace width="0.2em">pace>yrpan>pan>pan> of p>136p>Xe, while the same transitions of pan id="mmlsi6" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si6.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=8574a6a94c3e4ca037946834f4fa28bc" title="Click to view the MathML source">2νββpan>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">n>2n>νββpan>pan>pan> decay were evaluated in an exposure of pan id="mmlsi7" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si7.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=0e05e261d4e72ae276048dd21e7785bc">g class="imgLazyJSB inlineImage" height="14" width="73" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si7.gif"><noscript>g height="14" border="0" style="vertical-align:bottom" width="73" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si7.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">n>61.8n> kgpace width="0.2em">pace>⋅pace width="0.2em">pace>yrpan>pan>pan>. No excess over background was found for all decay modes. The lower half-life limits of the pan id="mmlsi2" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si2.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=5b97f0f3fafd4b39f6e23bbc7130e681">g class="imgLazyJSB inlineImage" height="19" width="20" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si2.gif"><noscript>g height="19" border="0" style="vertical-align:bottom" width="20" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si2.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>n>2n>n>1n>+p>pan>pan>pan> state transitions of pan id="mmlsi4" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si4.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=c34b03801f7ec0e33a08a1f178821773" title="Click to view the MathML source">0νββpan>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">n>0n>νββpan>pan>pan> and pan id="mmlsi6" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si6.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=8574a6a94c3e4ca037946834f4fa28bc" title="Click to view the MathML source">2νββpan>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">n>2n>νββpan>pan>pan> decay were improved to pan id="mmlsi8" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si8.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=b4628e9c36c110e1d9be96e29619f686">g class="imgLazyJSB inlineImage" height="23" width="207" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si8.gif"><noscript>g height="23" border="0" style="vertical-align:bottom" width="207" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si8.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>Tn>1n>/n>2n>n>0n>νp>(p>n>0n>+p>→p>n>2n>n>1n>+p>)&gt;n>2.6n>×p>n>10n>n>25n>p> yrpan>pan>pan> and pan id="mmlsi9" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si9.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=541315f08115814b9a20f573d91a9a21">g class="imgLazyJSB inlineImage" height="23" width="207" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si9.gif"><noscript>g height="23" border="0" style="vertical-align:bottom" width="207" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si9.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>Tn>1n>/n>2n>n>2n>νp>(p>n>0n>+p>→p>n>2n>n>1n>+p>)&gt;n>4.6n>×p>n>10n>n>23n>p> yrpan>pan>pan> (90% C.L.), respectively. We report on the first experimental lower half-life limits for the transitions to the pan id="mmlsi1" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si1.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=3e8d6adf32ae6893e5a1f420ed8ca958">g class="imgLazyJSB inlineImage" height="19" width="20" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si1.gif"><noscript>g height="19" border="0" style="vertical-align:bottom" width="20" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si1.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>n>0n>n>1n>+p>pan>pan>pan> state of p>136p>Xe for pan id="mmlsi4" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si4.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=c34b03801f7ec0e33a08a1f178821773" title="Click to view the MathML source">0νββpan>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">n>0n>νββpan>pan>pan> and pan id="mmlsi6" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si6.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=8574a6a94c3e4ca037946834f4fa28bc" title="Click to view the MathML source">2νββpan>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">n>2n>νββpan>pan>pan> decay. They are pan id="mmlsi10" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si10.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=efcf6db719ddb553bb9b9bf3dd9da351">g class="imgLazyJSB inlineImage" height="23" width="207" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si10.gif"><noscript>g height="23" border="0" style="vertical-align:bottom" width="207" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si10.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>Tn>1n>/n>2n>n>0n>νp>(p>n>0n>+p>→p>n>0n>n>1n>+p>)&gt;n>2.4n>×p>n>10n>n>25n>p> yrpan>pan>pan> and pan id="mmlsi11" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si11.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=1fbdfb4dc5e17b92608c9c4257c54408">g class="imgLazyJSB inlineImage" height="23" width="207" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si11.gif"><noscript>g height="23" border="0" style="vertical-align:bottom" width="207" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si11.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>Tn>1n>/n>2n>n>2n>νp>(p>n>0n>+p>→p>n>0n>n>1n>+p>)&gt;n>8.3n>×p>n>10n>n>23n>p> yrpan>pan>pan> (90% C.L.). The transitions to the pan id="mmlsi3" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si3.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=6a73bef336671d668075caec9f321760">g class="imgLazyJSB inlineImage" height="19" width="20" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si3.gif"><noscript>g height="19" border="0" style="vertical-align:bottom" width="20" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si3.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>n>2n>n>2n>+p>pan>pan>pan> states are also evaluated for the first time to be pan id="mmlsi12" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si12.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=a9ff1e7c94aed29982a846cb279bcc0d">g class="imgLazyJSB inlineImage" height="23" width="207" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si12.gif"><noscript>g height="23" border="0" style="vertical-align:bottom" width="207" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si12.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>Tn>1n>/n>2n>n>0n>νp>(p>n>0n>+p>→p>n>2n>n>2n>+p>)&gt;n>2.6n>×p>n>10n>n>25n>p> yrpan>pan>pan> and pan id="mmlsi13" class="mathmlsrc">g" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S037594741500278X&_mathId=si13.gif&_user=111111111&_pii=S037594741500278X&_rdoc=1&_issn=03759474&md5=c5eaebf4982e5ae29f08c69c415c182d">g class="imgLazyJSB inlineImage" height="23" width="207" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S037594741500278X-si13.gif"><noscript>g height="23" border="0" style="vertical-align:bottom" width="207" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S037594741500278X-si13.gif">noscript>pan class="mathContainer hidden">pan class="mathCode">gif" overflow="scroll">p>Tn>1n>/n>2n>n>2n>νp>(p>n>0n>+p>→p>n>2n>n>2n>+p>)&gt;n>9.0n>×p>n>10n>n>23n>p> yrpan>pan>pan> (90% C.L.). These results are compared to recent theoretical predictions.