%0 Journal Article %1 Collaboration2010Measurement %A Collaboration, Babar %A Lees, J. P. %D 2010 %K hyperfine %T Measurement of the gamma gamma* &\#45;&\#45;> eta\_c transition form factor %U http://arxiv.org/abs/1002.3000 %X We study the reaction e+e- --> e+e- eta\_c, eta\_c --> K\_S K+- pi-+ and obtain eta\_c mass and width values 2982.2+-0.4+-1.6 MeV/c^2 and 31.7+-1.2+-0.8 MeV, respectively. We find Gamma(eta\_c --> gamma gamma)B(eta\_c --> K anti-K pi)=0.374+-0.009+-0.031 keV, and measure the gamma gamma* --> eta\_c transition form factor in the momentum transfer range from 2 to 50 GeV^2. 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.

@article{Collaboration2010Measurement, abstract = {{We study the reaction e+e- --\> e+e- eta\_c, eta\_c --\> K\_S K+- pi-+ and obtain eta\_c mass and width values 2982.2+-0.4+-1.6 MeV/c^2 and 31.7+-1.2+-0.8 MeV, respectively. We find Gamma(eta\_c --\> gamma gamma)B(eta\_c --\> K anti-K pi)=0.374+-0.009+-0.031 keV, and measure the gamma gamma* --\> eta\_c transition form factor in the momentum transfer range from 2 to 50 GeV^2. 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.}}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Collaboration, Babar and Lees, J. P.}, biburl = {https://www.bibsonomy.org/bibtex/2f9ca07b8446a960ffa58a9a471893a8e/cmcneile}, citeulike-article-id = {9444213}, citeulike-linkout-0 = {http://arxiv.org/abs/1002.3000}, citeulike-linkout-1 = {http://arxiv.org/pdf/1002.3000}, day = 11, eprint = {1002.3000}, interhash = {7b1b9c0a51b517c24a5958e0c3b32fc9}, intrahash = {f9ca07b8446a960ffa58a9a471893a8e}, keywords = {hyperfine}, month = mar, posted-at = {2011-06-21 12:01:12}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{Measurement of the gamma gamma* \&\#45;\&\#45;\> eta\_c transition form factor}}, url = {http://arxiv.org/abs/1002.3000}, year = 2010 }