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Production of singlet P-wave $c ar c$ and $b ar b$ states | | Stephen Godfrey
; Jonathan L. Rosner
; | | Date: |
22 May 2002 | | Journal: | Phys.Rev. D66 (2002) 014012 | | Subject: | hep-ph | | Abstract: | No spin-singlet $b ar b$ quarkonium state has yet been observed. In this paper we discuss the production of the singlet P-wave $bar{b}$ and $car{c}$ $^1P_1$ states $h_b$ and $h_c$. We consider two possibilities. In the first the $^1P_1$ states are produced via the electromagnetic cascades $ups(3S) o eta_b(2S) + gamma o h_b + gamma gamma o eta_b +gammagammagamma $ and $psi’ o eta_c’ + gamma o h_c + gamma gamma o eta_c + gammagammagamma$. A more promising process consists of single pion transition to the $^1P_1$ state followed by the radiative transition to the $1^1S_0$ state: $ups(3S) o h_b + pi^0 o eta_b + pi^0 +gamma$ and $psi’ o h_c + pi^0 o eta_c + pi^0 +gamma$. For a million $ups(3S)$ or $psi’$’s produced we expect these processes to produce several hundred events. | | Source: | arXiv, hep-ph/0205255 | | Services: | Forum | Review | PDF | Favorites | |
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