物理
物理
물리
2015年
2期
92-95
,共4页
Zb(10610)%Zb(10650)%X(3872)%Xb%底偶素%类底偶素
Zb(10610)%Zb(10650)%X(3872)%Xb%底偶素%類底偶素
Zb(10610)%Zb(10650)%X(3872)%Xb%저우소%류저우소
Zb(10610)%Zb(10650)%X(3872)%Xb%bottomonium%bottomonium-like
Belle实验组利用在?(5S)共振峰上采集的大数据样本,对e+e-→π+π-?(nS)和π+π-hb (mP)(n=1,2,3,m=1,2)过程进行了研究,在π±?(nS)和π±hb(mP)的系统中,同时观测到了两个新的带电类底偶素结构——Zb(10610)和Zb(10650)。它们衰变到底偶素末态,同时还带有电荷,所以它们的组成成份中至少含有4个夸克。最近,对e+e-→π+π-π0γ?(1S)过程也进行了研究,在ω?(1S)系统中对类X(3872)的底偶素态Xb进行了寻找。
Belle實驗組利用在?(5S)共振峰上採集的大數據樣本,對e+e-→π+π-?(nS)和π+π-hb (mP)(n=1,2,3,m=1,2)過程進行瞭研究,在π±?(nS)和π±hb(mP)的繫統中,同時觀測到瞭兩箇新的帶電類底偶素結構——Zb(10610)和Zb(10650)。它們衰變到底偶素末態,同時還帶有電荷,所以它們的組成成份中至少含有4箇誇剋。最近,對e+e-→π+π-π0γ?(1S)過程也進行瞭研究,在ω?(1S)繫統中對類X(3872)的底偶素態Xb進行瞭尋找。
Belle실험조이용재?(5S)공진봉상채집적대수거양본,대e+e-→π+π-?(nS)화π+π-hb (mP)(n=1,2,3,m=1,2)과정진행료연구,재π±?(nS)화π±hb(mP)적계통중,동시관측도료량개신적대전류저우소결구——Zb(10610)화Zb(10650)。타문쇠변도저우소말태,동시환대유전하,소이타문적조성성빈중지소함유4개과극。최근,대e+e-→π+π-π0γ?(1S)과정야진행료연구,재ω?(1S)계통중대류X(3872)적저우소태Xb진행료심조。
Using data samples collected with the Belle detector at the ?(5S) resonance, the e+e-→π+π-?(nS) and π+π-hb(mP) (n=1, 2, 3, m=1, 2) processes were investigated. Two charged bottomonium-like states Zb(10610) and Zb(10650) were observed in theπ±?(nS) andπ±hb (mP) invariant mass distributions. Since they decay into bottomonium states and are charged, they must have at least four quarks in their composition. Very recently, e+e-→π+π-π0γ?(1S) was also studied, and a search for the X(3872)-like state, Xb , was performed in the bottom sector.