3 RECENT CLEO Υ ( 1 S ) and Υ ( 3 S ) RESULTS

نویسنده

  • T. E. COAN
چکیده

Recent CLEO results on the observation of the Υ(1D) state and a search for the η b (1S) state from a data sample of 4.7 × 10 6 Υ(3S) decays collected with the CLEO-III detector, and a measurement of the η ′ production spectrum using 1.9 × 10 6 Υ(1S) decays collected with the CLEO-II detector are described.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Evidence for Bs Production at the Υ(5s) from Cleo and Properties of the Υ(4s) from Babar

The Υ(4S) is the lowest bb̄ resonance above BB̄ threshold. Its mass and total width had been measured in scans of the total ee cross-section at center of mass energy around 10.58 GeV. 1,2,3,4 The Υ(4S) decays into BB andBB̄ modes allowing these particles to be carefully studied. Many B branching fractions had been measured from Υ(4S) data. Most of them, however, based on the assumption of equal pr...

متن کامل

Results and prospects for Υ ( 5 S ) running at B - factories

During the last several years an opportunity for B s meson studies at the e e colliders running at the Υ(5S) resonance has been extensively explored. The first evidence for B s production at the Υ(5S) was found by the CLEO collaboration [1, 2] using a dataset of 0.42 fb collected in 2003. This study indicated that practicalB s measurements at the Υ(5S) are possible with a dataset of at least 20...

متن کامل

CLEO Results on Upsilons a

I present highlights of recent CLEO studies on the Υ(1S), Υ(2S), and Υ(3S). The preliminary results presented here include the first observation of a hadronic cascade in the Υ system not involving pions, Υ(3S) → γχ b1,2 (2P) followed by χ b1,2 (2P) → ωΥ(1S). I also present preliminary results on a search for inclusive ψ production in Υ(1S) decays. I end with a search for nine different two body...

متن کامل

ar X iv : 0 70 5 . 03 42 v 1 [ he p - ex ] 2 M ay 2 00 7 Υ ( 5 S ) : What has been learned and what can be learned

The Υ(5S) was discovered about 20 years ago in ee collisions at CLEO [1] and CUSB [2]. Its mass is (10865 ± 8) MeV, about 300 MeV higher than the Υ(4S) resonance, and its width of (110± 13) MeV is about five times larger than the Υ(4S) resonance. Its production cross-section was measured to be about 0.3 nb, about ten times lower than the Υ(4S) cross-section. Owing to its mass, the Υ(5S) can dec...

متن کامل

CLNS 98/1576 CLEO 98-12 Υ dipion transitions at energies near the Υ(4S).

Using a 4.19 fb−1 data sample collected with the CLEO II detector at the Cornell Electron Storage Ring, we have searched for dipion transitions between pairs of Υ resonances at center of mass energies Ecm = 10.58 GeV and Ecm = 10.52 GeV. We obtain the 90% confidence level upper limits B(Υ(4S) → Υ(2S)π+π−) < 3.9 × 10−4 and B(Υ(4S) → Υ(1S)π+π−) < 1.2 × 10−4. We also observe the transitions Υ(3S) ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003