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Signatures of the d^{*}(2380) Hexaquark in d(γ,pn[over →]).
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-04-03 , DOI: 10.1103/physrevlett.124.132001 M Bashkanov 1 , D P Watts 1 , S J D Kay 2 , S Abt 3 , P Achenbach 4 , P Adlarson 4 , F Afzal 5 , Z Ahmed 2 , C S Akondi 6 , J R M Annand 7 , H J Arends 4 , R Beck 5 , M Biroth 4 , N Borisov 8 , A Braghieri 9 , W J Briscoe 10 , F Cividini 4 , C Collicott 11 , S Costanza 9, 12 , A Denig 4 , E J Downie 10 , P Drexler 4, 13 , S Fegan 1 , A Fix 14 , S Gardner 7 , D Ghosal 3 , D I Glazier 7 , I Gorodnov 8 , W Gradl 4 , M Günther 3 , D Gurevich 15 , L Heijkenskjöld 4 , D Hornidge 16 , G M Huber 2 , A Käser 3 , V L Kashevarov 4, 8 , M Korolija 17 , B Krusche 3 , A Lazarev 8 , K Livingston 7 , S Lutterer 3 , I J D MacGregor 7 , D M Manley 6 , P P Martel 4, 16 , R Miskimen 18 , E Mornacchi 4 , C Mullen 7 , A Neganov 8 , A Neiser 4 , M Ostrick 4 , P B Otte 4 , D Paudyal 2 , P Pedroni 9 , A Powell 7 , S N Prakhov 19 , G Ron 20 , A Sarty 11 , C Sfienti 4 , V Sokhoyan 4 , K Spieker 5 , O Steffen 4 , I I Strakovsky 10 , T Strub 3 , I Supek 17 , A Thiel 5 , M Thiel 4 , A Thomas 4 , Yu A Usov 8 , S Wagner 4 , N K Walford 3 , D Werthmüller 1 , J Wettig 4 , M Wolfes 4 , N Zachariou 1 , L A Zana 21 ,
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-04-03 , DOI: 10.1103/physrevlett.124.132001 M Bashkanov 1 , D P Watts 1 , S J D Kay 2 , S Abt 3 , P Achenbach 4 , P Adlarson 4 , F Afzal 5 , Z Ahmed 2 , C S Akondi 6 , J R M Annand 7 , H J Arends 4 , R Beck 5 , M Biroth 4 , N Borisov 8 , A Braghieri 9 , W J Briscoe 10 , F Cividini 4 , C Collicott 11 , S Costanza 9, 12 , A Denig 4 , E J Downie 10 , P Drexler 4, 13 , S Fegan 1 , A Fix 14 , S Gardner 7 , D Ghosal 3 , D I Glazier 7 , I Gorodnov 8 , W Gradl 4 , M Günther 3 , D Gurevich 15 , L Heijkenskjöld 4 , D Hornidge 16 , G M Huber 2 , A Käser 3 , V L Kashevarov 4, 8 , M Korolija 17 , B Krusche 3 , A Lazarev 8 , K Livingston 7 , S Lutterer 3 , I J D MacGregor 7 , D M Manley 6 , P P Martel 4, 16 , R Miskimen 18 , E Mornacchi 4 , C Mullen 7 , A Neganov 8 , A Neiser 4 , M Ostrick 4 , P B Otte 4 , D Paudyal 2 , P Pedroni 9 , A Powell 7 , S N Prakhov 19 , G Ron 20 , A Sarty 11 , C Sfienti 4 , V Sokhoyan 4 , K Spieker 5 , O Steffen 4 , I I Strakovsky 10 , T Strub 3 , I Supek 17 , A Thiel 5 , M Thiel 4 , A Thomas 4 , Yu A Usov 8 , S Wagner 4 , N K Walford 3 , D Werthmüller 1 , J Wettig 4 , M Wolfes 4 , N Zachariou 1 , L A Zana 21 ,
Affiliation
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We report a measurement of the spin polarization of the recoiling neutron in deuterium photodisintegration, utilizing a new large acceptance polarimeter within the Crystal Ball at MAMI. The measured photon energy range of 300-700 MeV provides the first measurement of recoil neutron polarization at photon energies where the quark substructure of the deuteron plays a role, thereby providing important new constraints on photodisintegration mechanisms. A very high neutron polarization in a narrow structure centered around E_{γ}∼570 MeV is observed, which is inconsistent with current theoretical predictions employing nucleon resonance degrees of freedom. A Legendre polynomial decomposition suggests this behavior could be related to the excitation of the d^{*}(2380) hexaquark.
中文翻译：
d（γ，pn [over→]）中d ^ {**（2380）Hexaquark的签名。
我们报告了在MAMI晶体球内利用新的大型接收旋光计测量的氘光分解中反冲中子的自旋极化的测量结果。测得的300-700 MeV的光子能量范围提供了在氘核的夸克子结构发挥作用的光子能量下反冲中子极化的首次测量，从而为光致崩解机制提供了重要的新约束。在以E_ {γ}〜570 MeV为中心的狭窄结构中观察到非常高的中子极化，这与当前采用核共振自由度的理论预测不一致。勒让德多项式分解表明，此行为可能与d ^ {*}（2380）六夸克的激发有关。
更新日期：2020-03-31
中文翻译：
d（γ，pn [over→]）中d ^ {**（2380）Hexaquark的签名。
我们报告了在MAMI晶体球内利用新的大型接收旋光计测量的氘光分解中反冲中子的自旋极化的测量结果。测得的300-700 MeV的光子能量范围提供了在氘核的夸克子结构发挥作用的光子能量下反冲中子极化的首次测量，从而为光致崩解机制提供了重要的新约束。在以E_ {γ}〜570 MeV为中心的狭窄结构中观察到非常高的中子极化，这与当前采用核共振自由度的理论预测不一致。勒让德多项式分解表明，此行为可能与d ^ {*}（2380）六夸克的激发有关。
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