Cross Section Measurements of Charged Pion Photoproduction in Hydrogen and Deuterium from 1.1 to 5.5 GeV

Journal Article · Wed Sep 01 04:00:00 EDT 2004 · Physical Review C

OSTI ID:836442

Zhu, L Y; Arrington, John; Averett, Todd; Beise, Elizabeth; Calarco, John; Chang, Ting; Chen, Jian-Ping; Chudakov, Eugene; Coman, Marius; Clasie, Benjamin; Crawford, Christopher; Dieterich, Sonja; Dohrmann, Frank; Dutta, Dipangkar; Fissum, Kevin; Frullani, Salvatore; Gao, Haiyan; Gilman, Ronald; Glashausser, Charles; Gomez, Javier ; Hafidi, Kawtar; Hansen, Jens-ole; Higinbotham, Douglas; Holt, Roy; Jager, Cornelis De; Jiang, Xiaodong; Kinney, Edward; Kramer, Kevin; Kumbartzki, Gerfried; LeRose, John; Liyanage, Nilanga; Mack, David; Markowitz, Pete; McCormick, Kathy; Meekins, David; Meziani, Zein-Eddine; Michaels, Robert; Mitchell, Joseph; Nanda, Sirish; Potterveld, David; Ransome, Ronald; Reimer, Paul; Reitz, Bodo; Saha, Arunava; Schulte, Elaine; Seely, Charles; Sirca, Simon; Strauch, Steffen; Sulkosky, Vincent; Vlahovic, Branislav; Weinstein, Lawrence; Wijesooriya, Krishni; Williamson, Claude; Wojtsekhowski, Bogdan; XIANG, Hong; Xiong, Feng; Xu, Wang; Zeng, Jianning; Zheng, Xiaochao

The differential cross section for the {gamma}n {yields} {pi}{sup -}p and the {gamma}p {yields} {pi}{sup +}n processes were measured at Jefferson Lab. The photon energies ranged from 1.1 to 5.5 GeV, corresponding to center-of-mass energies from 1.7 to 3.4 GeV. The pion center-of-mass angles varied from 50 degree to 110 degree. The {pi}{sup -} and {pi}{sup +} photoproduction data both exhibit a global scaling behavior at high energies and high transverse momenta, consistent with the constituent counting rule prediction and the existing {pi}{sup +} data. The data suggest possible substructure of the scaling behavior, which might be oscillations around the scaling value. The data show an enhancement in the scaled cross section at center-of-mass energy near 2.2 GeV. The differential cross section ratios at high energies and high transverse momenta can be described by calculations based on one-hard-gluon-exchange diagrams.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 836442
• Report Number(s): JLAB-PHY-04-47; DOE/ER/40150-3086; nucl-ex/0409018
• Journal Information: Physical Review C, Journal Name: Physical Review C Vol. 71
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
CROSS SECTIONS
DEUTERIUM
DIFFERENTIAL CROSS SECTIONS
FORECASTING
HYDROGEN
OSCILLATIONS
PHOTONS
PHOTOPRODUCTION
PIONS