Tetraquark interpretation of e+e- → (SIC) π+π- Belle data and e+e- → b(b)over-bar BaBar data

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作者：
Ali, Ahmed [1 ]
机构：
[1] Deutsch Elekronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany
来源：
35TH INTERNATIONAL CONFERENCE OF HIGH ENERGY PHYSICS (ICHEP 2010) | 2010年
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O412 [相对论、场论]; O572.2 [粒子物理学];
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摘要：
We summarize the main features of the spectroscopy, production and decays of the J(PC) = 1(--) tetraquarks in the b (b) over bar sector, concentrating on the lowest state called Y-b (10890). The tetraquark framework is used to analyze the BaBar data on the e(+)e(-) -> b (b) over bar cross section (R-b energy scan) between root s = 10.54 and 11.20 GeV and the Belle data on the processes e(+)e(-) -> (sic)(1S)pi(+)pi(-),(sic)(2S)pi(+)pi(-) near the peak of the (sic)(5S) resonance. The BaBar R-b energy scan is consistent with an additional state at a mass of 10.90 GeV and a width of about 28 MeV, in broad agreement with the state Y-b (10890) GeV seen by Belle in the exclusive final states. We argue that the decay widths and the dipion invariant mass distributions measured by Belle are naturally explained by the tetraquark interpretation of Y-b(10890)
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