Recent results on hadronic ϒ(1S/2S) decays at Belle

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• 作者：S.D. Yangp>ap>p> ; p>p>shaodanyang@pku.edu.cn" class="auth_mail" title="E-mail the corresponding authorp> ; on behalf of Belle Collaboration
• 关键词：ϒ(1S/2S)ϒ(1S/2S) decays ; charmonium-(like) productions ; light hadrons ; hadronic transitions
• 刊名：Nuclear and Particle Physics Proceedings
• 出版年：2016
• 出版时间：January-March 2016
• 年：2016
• 卷：270-272
• 期：Complete
• 页码：118-122
• 全文大小：1558 K

文摘

Using the data samples of pan id="mmlsi1" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si1.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=df4e134eb9c4380fef4529b06a36f4a3" title="Click to view the MathML source">102×10p>6p>ϒ(1S)pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si1.gif" overflow="scroll">102×p>106p>athvariant="normal">ϒalse">(1Salse">)ath>pan>pan>pan> and pan id="mmlsi2" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si2.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=4ec495d1722d6aadf76dba9a664b6c45" title="Click to view the MathML source">158×10p>6p>ϒ(2S)pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si2.gif" overflow="scroll">158×p>106p>athvariant="normal">ϒalse">(2Salse">)ath>pan>pan>pan> events collected at Belle, several studies on pan id="mmlsi3" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si3.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=b186ab51169e32ce99215ac38678f1dc" title="Click to view the MathML source">ϒ(1S/2S)pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si3.gif" overflow="scroll">athvariant="normal">ϒalse">(1Salse">/2Salse">)ath>pan>pan>pan> decays have been performed recently. Charge-parity-even charmonium(-like) states, such as pan id="mmlsi4" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si4.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=414be7c32c1b4a0f3d3224e0d1f05fab" title="Click to view the MathML source">χ_c0,1,2pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si4.gif" overflow="scroll">χc0,1,2ath>pan>pan>pan>, pan id="mmlsi5" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si5.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=afeb091a71b32094c4aa3798f61345fa" title="Click to view the MathML source">η_cpan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si5.gif" overflow="scroll">ηcath>pan>pan>pan>, X(3872), X(3915), Y(4140), and X  (4350) (only in pan id="mmlsi6" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si6.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=493bee732759cd2f3a064b1a4093a6c8" title="Click to view the MathML source">ϒ(2S)pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si6.gif" overflow="scroll">athvariant="normal">ϒalse">(2Salse">)ath>pan>pan>pan> data), are first searched in pan id="mmlsi3" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si3.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=b186ab51169e32ce99215ac38678f1dc" title="Click to view the MathML source">ϒ(1S/2S)pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si3.gif" overflow="scroll">athvariant="normal">ϒalse">(1Salse">/2Salse">)ath>pan>pan>pan> radiative decays, though there are no significant signals observed. Among double-charmonium final states from pan id="mmlsi3" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si3.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=b186ab51169e32ce99215ac38678f1dc" title="Click to view the MathML source">ϒ(1S/2S)pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si3.gif" overflow="scroll">athvariant="normal">ϒalse">(1Salse">/2Salse">)ath>pan>pan>pan> exclusive decays, the evidence for pan id="mmlsi7" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si7.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=059340f7a27dfe9b519ecc3da075e307" title="Click to view the MathML source">ϒ(1S)&rarr;J/ψχ_c1pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si7.gif" overflow="scroll">athvariant="normal">ϒalse">(1Salse">)alse">&rarr;Jalse">/ψχc1ath>pan>pan>pan> was found first with a signal significance of 4.6σ, and the branching fraction was measured to be (3.90 &plusmn; 1.21(stat.) &plusmn; 0.23(syst.)) × 10p>-6p>. Some exclusive light hadronic decays are also searched for the first time, including the intermediate vector-tensor, axial-vector-pseudoscaler, and vector-pseudoscaler processes. Signals are observed in the pan id="mmlsi8" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si8.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=08919d3a32b227985e51e9c149271693" title="Click to view the MathML source">ϒ(1S)&rarr;ϕKp>+p>Kp>−p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si8.gif" overflow="scroll">athvariant="normal">ϒalse">(1Salse">)alse">&rarr;ϕp>K+p>p>K−p>ath>pan>pan>pan>, pan id="mmlsi9" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si9.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=954aeebfe782a05feb9982bc7ae7c663" title="Click to view the MathML source">ωπp>+p>πp>−p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si9.gif" overflow="scroll">ωp>π+p>p>π−p>ath>pan>pan>pan>, pan id="mmlsi10" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si10.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=6367e1ca29d561c40847ffd55aadee42" title="Click to view the MathML source">Kp>⁎p>(892)p>0p>Kp>−p>πp>+p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si10.gif" overflow="scroll">p>K⁎p>p>alse">(892alse">)0p>p>K−p>p>π+p>ath>pan>pan>pan>, pan id="mmlsi11" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si11.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=6e15139934f294d06d7d6593c7a6595a">ass="imgLazyJSB inlineImage" height="20" width="110" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601416000262-si11.gif">pt>al-align:bottom" width="110" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S2405601416000262-si11.gif">pt>a>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si11.gif" overflow="scroll">p>KS0p>p>K+p>p>π−p>+c.c.ath>pan>pan>pan>, pan id="mmlsi12" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si12.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=d3046b1c12ba7ef65646b03047cb343c" title="Click to view the MathML source">πp>+p>πp>−p>πp>0p>πp>0p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si12.gif" overflow="scroll">p>π+p>p>π−p>p>π0p>p>π0p>ath>pan>pan>pan>, pan id="mmlsi13" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si13.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=d4c9d1f2af667f4cbee2b573ab45271f">ass="imgLazyJSB inlineImage" height="20" width="137" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601416000262-si13.gif">pt>al-align:bottom" width="137" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S2405601416000262-si13.gif">pt>a>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si13.gif" overflow="scroll">p>K⁎p>p>alse">(892alse">)0p>p>accent="true">K‾2⁎p>p>alse">(1430alse">)0p>ath>pan>pan>pan> and pan id="mmlsi14" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si14.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=ba77d2fe89e9604b3fecb578da176e6f" title="Click to view the MathML source">ϒ(2S)&rarr;ϕKp>+p>Kp>−p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si14.gif" overflow="scroll">athvariant="normal">ϒalse">(2Salse">)alse">&rarr;ϕp>K+p>p>K−p>ath>pan>pan>pan>, pan id="mmlsi10" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si10.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=6367e1ca29d561c40847ffd55aadee42" title="Click to view the MathML source">Kp>⁎p>(892)p>0p>Kp>−p>πp>+p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si10.gif" overflow="scroll">p>K⁎p>p>alse">(892alse">)0p>p>K−p>p>π+p>ath>pan>pan>pan>, pan id="mmlsi12" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si12.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=d3046b1c12ba7ef65646b03047cb343c" title="Click to view the MathML source">πp>+p>πp>−p>πp>0p>πp>0p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si12.gif" overflow="scroll">p>π+p>p>π−p>p>π0p>p>π0p>ath>pan>pan>pan> decay modes, and evidence is found for the modes of pan id="mmlsi15" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si15.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=d2242c35d65ec59f3f57c3ea4c35d3c4" title="Click to view the MathML source">ϒ(1S)&rarr;πp>+p>πp>−p>πp>0p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si15.gif" overflow="scroll">athvariant="normal">ϒalse">(1Salse">)alse">&rarr;p>π+p>p>π−p>p>π0p>ath>pan>pan>pan>, pan id="mmlsi16" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si16.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=bd78ebb5a7ecdfbf8a5e9a8f495fc34b" title="Click to view the MathML source">K₁(1400)p>+p>Kp>−p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si16.gif" overflow="scroll">K1p>alse">(1400alse">)+p>p>K−p>ath>pan>pan>pan>, pan id="mmlsi17" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si17.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=36bcad3d1c46400600a064412900655f">ass="imgLazyJSB inlineImage" height="18" width="128" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601416000262-si17.gif">pt>al-align:bottom" width="128" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S2405601416000262-si17.gif">pt>a>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si17.gif" overflow="scroll">p>K⁎p>p>alse">(892alse">)0p>p>accent="true">K‾0p>+c.c.ath>pan>pan>pan> and pan id="mmlsi18" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si18.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=26c7e65ad69221ec2e41eab1defeb17d">ass="imgLazyJSB inlineImage" height="20" width="177" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601416000262-si18.gif">pt>al-align:bottom" width="177" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S2405601416000262-si18.gif">pt>a>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si18.gif" overflow="scroll">athvariant="normal">ϒalse">(2Salse">)alse">&rarr;p>KS0p>p>K+p>p>π−p>+c.c.ath>pan>pan>pan>, pan id="mmlsi13" class="mathmlsrc"><a title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si13.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=d4c9d1f2af667f4cbee2b573ab45271f">ass="imgLazyJSB inlineImage" height="20" width="137" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S2405601416000262-si13.gif">pt>al-align:bottom" width="137" alt="View the MathML source" title="View the MathML source" src="http://origin-ars.els-cdn.com/content/image/1-s2.0-S2405601416000262-si13.gif">pt>a>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si13.gif" overflow="scroll">p>K⁎p>p>alse">(892alse">)0p>p>accent="true">K‾2⁎p>p>alse">(1430alse">)0p>ath>pan>pan>pan>. In addition, the study of the hadronic transitions, pan id="mmlsi19" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si19.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=2bb65433396d451df01a42e55e68fdb6" title="Click to view the MathML source">ϒ(2S)&rarr;(η,πp>0p>)ϒ(1S)pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si19.gif" overflow="scroll">athvariant="normal">ϒalse">(2Salse">)alse">&rarr;alse">(η,p>π0p>alse">)athvariant="normal">ϒalse">(1Salse">)ath>pan>pan>pan>, is performed, and pan id="mmlsi20" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si20.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=ffbbb0b535e2f70308a2666434c48237" title="Click to view the MathML source">B(ϒ(2S)&rarr;ηϒ(1S))=(3.57&plusmn;0.25(stat.)&plusmn;0.21(syst.))×106−4pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si20.gif" overflow="scroll">athvariant="script">Balse">(athvariant="normal">ϒalse">(2Salse">)alse">&rarr;ηathvariant="normal">ϒalse">(1Salse">)alse">)=alse">(3.57&plusmn;0.25alse">(stat.alse">)&plusmn;0.21alse">(syst.alse">)alse">)×106−4ath>pan>pan>pan> and pan id="mmlsi21" class="mathmlsrc">pan class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S2405601416000262&_mathId=si21.gif&_user=111111111&_pii=S2405601416000262&_rdoc=1&_issn=24056014&md5=22a2254e145ebad7b30f006d28fb3db8" title="Click to view the MathML source">B(ϒ(2S)&rarr;πp>0p>ϒ(1S))<4.1×10p>−5p>pan>pan class="mathContainer hidden">pan class="mathCode">ath altimg="si21.gif" overflow="scroll">athvariant="script">Balse">(athvariant="normal">ϒalse">(2Salse">)alse">&rarr;p>π0p>athvariant="normal">ϒalse">(1Salse">)alse">)<4.1×p>10−5p>ath>pan>pan>pan> (90%C.L.) are obtained.