Measurement of the γγ*→η<sub>c</sub> transition form factor

Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Brown, D. N.; Hooberman, B.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Tanabe, T.

doi:10.1103/PhysRevD.81.052010

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Measurement of the γγ*→η_c transition form factor

Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Brown, D. N.; Hooberman, B.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Tanabe, T.
arXiv e-print [ PDF ]2010

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AbstractAbstract

[en] We study the reaction e⁺e^-→e⁺e^-η_c, η_c→K_SK^±π^± and obtain η_c mass and width values 2982.2±0.4±1.6 MeV/c² and 31.7±1.2±0.8 MeV, respectively. We find Γ(η_c→γγ)B(η_c→KKπ)=0.374±0.009±0.031 keV, and measure the γγ*→η_c transition form factor in the momentum transfer range from 2 to 50 GeV². The analysis is based on 469 fb^-1 of integrated luminosity collected at PEP-II with the BABAR detector at e⁺e^- center-of-mass energies near 10.6 GeV.

Primary Subject

PHYSICS OF ELEMENTARY PARTICLES AND FIELDS (S72)

Source

Record Type

Journal Article

Journal

Physical Review. D, Particles Fields; ISSN 0556-2821;

; CODEN PRVDAQ; v. 81(5); p. 052010-052010.18

Country of publication

United States

Descriptors (DEI)

CENTER-OF-MASS SYSTEM, ELECTRON-POSITRON COLLISIONS, ELECTRONS, FORM FACTORS, GEV RANGE 01-10, LUMINOSITY, MASS, MEV RANGE, MOMENTUM TRANSFER, POSITRONS

Descriptors (DEC)

ANTILEPTONS, ANTIMATTER, ANTIPARTICLES, COLLISIONS, DIMENSIONLESS NUMBERS, ELECTRON COLLISIONS, ELEMENTARY PARTICLES, ENERGY RANGE, FERMIONS, GEV RANGE, LEPTONS, MATTER, OPTICAL PROPERTIES, PARTICLE PROPERTIES, PHYSICAL PROPERTIES, POSITRON COLLISIONS

LanguageLanguage

English

Reference NumberReference Number

42002982

INIS VolumeINIS Volume

INIS IssueINIS Issue

External URLExternal URL

http://dx.doi.org/10.1103/PhysRevD.81.052010

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