Signals for the formation of the singlet D and P states of charmonium in p̄p collisions

Fred L. Ridener, Kunnat J. Sebastian

Research output: Contribution to journalArticle

Abstract

We calculate the angular distribution of the photons produced in the decays of the singlet D and singlet P states in charmonium directly produced by unpolarized proton-antiproton (pp̄) collisions. The reactions we study are (1) pp̄→1D2→1P1+γ, (2) pp̄→1D2→1 3S1+γ, and (3) pp̄→1P1→1S0+γ. We also study the angular distribution of the electron (e-) in the cascade process (4) pp̄→1P1→ψ+π0→(e+e-)+(γ1γ2). Simple and distinct expressions are found for each case. The observation of the photon or electron (as the case may be) with the appropriate energy and the distinct angular distribution may be taken as a signal for the formation of the singlet D and P state resonance formation in pp̄ collisions.

Original languageEnglish (US)
Pages (from-to)1172-1176
Number of pages5
JournalPhysical Review D
Volume51
Issue number3
DOIs
StatePublished - Jan 1 1995

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angular distribution
collisions
photons
antiprotons
cascades
electrons
protons
decay
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Ridener, Fred L. ; Sebastian, Kunnat J. / Signals for the formation of the singlet D and P states of charmonium in p̄p collisions. In: Physical Review D. 1995 ; Vol. 51, No. 3. pp. 1172-1176.
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Signals for the formation of the singlet D and P states of charmonium in p̄p collisions. / Ridener, Fred L.; Sebastian, Kunnat J.

In: Physical Review D, Vol. 51, No. 3, 01.01.1995, p. 1172-1176.

Research output: Contribution to journalArticle

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N2 - We calculate the angular distribution of the photons produced in the decays of the singlet D and singlet P states in charmonium directly produced by unpolarized proton-antiproton (pp̄) collisions. The reactions we study are (1) pp̄→1D2→1P1+γ, (2) pp̄→1D2→1 3S1+γ, and (3) pp̄→1P1→1S0+γ. We also study the angular distribution of the electron (e-) in the cascade process (4) pp̄→1P1→ψ+π0→(e+e-)+(γ1γ2). Simple and distinct expressions are found for each case. The observation of the photon or electron (as the case may be) with the appropriate energy and the distinct angular distribution may be taken as a signal for the formation of the singlet D and P state resonance formation in pp̄ collisions.

AB - We calculate the angular distribution of the photons produced in the decays of the singlet D and singlet P states in charmonium directly produced by unpolarized proton-antiproton (pp̄) collisions. The reactions we study are (1) pp̄→1D2→1P1+γ, (2) pp̄→1D2→1 3S1+γ, and (3) pp̄→1P1→1S0+γ. We also study the angular distribution of the electron (e-) in the cascade process (4) pp̄→1P1→ψ+π0→(e+e-)+(γ1γ2). Simple and distinct expressions are found for each case. The observation of the photon or electron (as the case may be) with the appropriate energy and the distinct angular distribution may be taken as a signal for the formation of the singlet D and P state resonance formation in pp̄ collisions.

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