论是否存在s=-3的双重子.pdf

Ú 24 í Ú 9 Ú ß Ü ï í ë Ë ï í v d .24 , N0.9 2 00 0 ê 9  EÙGH ENERGY PTf YSIES AND NLE LEAR PEfYSKB Sep . , 20 0 0 Di bar yon Possi ble? å Is A ny s L I Ø ang Bizd SEÇ N PeIIg N ian N 1 ( Ind t ute of H¡ Energ Ph sics , TEe Á t nm Academy of sdo zees , BezyÖ 1´ m39 . Á i na ) 2 ( I,,stm te of TEeora ta t ph3$40 , 1³ , Á t ª á ú ,,£ of scm c¡ , Bezytng 1´ ô 80 , O Etna ) 3 (G FUer of m ra46ai Nuclear Ph® , Nasm ai t ab. of fç w b , k ceJm sor , u nd o-473Þ Þ , Á 4 ) A M U³ t W e invÄ UgBte the bind zª m a w d × -quar k syste m w it h sm ù Ø Ø s = - 3 m de the m zm t ue zt quar k modd m t he hm Eewï k d RGM . × Ee a rÑ e NO cham d w it h spin S = 2 and t he ú ª e M l cha mel w it h Ä ES = 3 m Þ ¦ ² À , mm ct ively . T he m u1 d mw t hat bot h tw o syst e m m fom loï d y bmmd stabg : t h bmd zª Å e g e m mzû d h m 3 . F - 12 . 7 M eV for NO m d 4 .4- 14 .2 M eV fg AQ SYSte n , m p ect ively . EEey w ² RG M , £OZESt i tut m t quar k model , bmÄ µ Ø EZ Y A lt h01û h H pg t id e w m pr edicted by Jaf h in 1977 [l u m m d the dibary Þ s has beÄ fom d ex pd m ental ly - T IÉ is Þ t only becam e of e3Õ er imen tt d di f f icul t y , but also due m lack of acn m t e pmdict ion w hich is cam ed by t he ØØ lvable m n pleÔ ty of nonpert urbat ive quant um chzÄ Eody nm ×Ê ( N PCX D ) ef fects at low Ê 1g gy zç ion - It has been h ow n t hat di bz yon is a Þ lor sing let mu16 - quar k systa B w ith a S