phi-meson photoproduction on Hydrogen in the neutral decay mode

Journal Article · Thu May 01 00:00:00 EDT 2014 · Phys. Rev. C

DOI:https://doi.org/10.1103/PhysRevC.89.055206· OSTI ID:1149614

Seraydaryan, Helena ^[1]; Amaryan, Moscov J. ^[1]; Gavalian, Gagik ^[2]; Baghdasaryan, Hovhannes A. ^[3]; Weinstein, Larry ^[1]

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1. ODU
2. JLAB
3. UVA

We report the first measurement of the photoproduction cross section of the $$\phi$$ meson in its neutral decay mode in the reaction $$\gamma p \to p\phi(K_SK_L)$$. The experiment was performed with a tagged photon beam of energy $$1.6 \le E_\gamma \le 3.6$$ GeV incident on a liquid hydrogen target of the CLAS spectrometer at the Thomas Jefferson National Accelerator Facility. The $$p \phi$$ final state is identified via reconstruction of $$K_S$$ in the invariant mass of two oppositely charged pions and by requiring the missing particle in the reaction $$\gamma p \to p K_S X$$ to be $$K_L$$. The presented results significantly enlarge the existing data on $$\phi$$-photoproduction. These data, combined with the data from the charged decay mode, will help to constrain different mechanisms of $$\phi$$ photoproduction.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 1149614
• Report Number(s): JLAB-PHY-13-1769; DOE/OR/23177-2686; arXiv:1308.1363
• Journal Information: Phys. Rev. C, Vol. 89, Issue 05
• Country of Publication: United States
• Language: English