# A Study of $e^+e^-\to p\bar{p}$ Using Initial StateRadiation with BaBar

### Description

The e{sup +}e{sup -} {yields} p{bar p} cross-section is determined over a range of p{bar p} masses, from threshold to 4.5 GeV/c{sup 2}, by studying the e{sup +}e{sup -} {yields} p{bar p}{gamma} process. The data set corresponds to an integrated luminosity of 232 fb{sup -1}, collected with the BABAR detector at the PEP-II storage ring, at an e{sup +}e{sup -} center-of-mass energy of 10.6 GeV. The mass dependence of the ratio of electric and magnetic form factors, |G{sub E}/G{sub M}|, is measured for p{bar p} masses below 3 GeV/c{sup 2}; its value is found to be significantly larger than 1 ... continued below

23 pages

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## What

### Description

The e{sup +}e{sup -} {yields} p{bar p} cross-section is determined over a range of p{bar p} masses, from threshold to 4.5 GeV/c{sup 2}, by studying the e{sup +}e{sup -} {yields} p{bar p}{gamma} process. The data set corresponds to an integrated luminosity of 232 fb{sup -1}, collected with the BABAR detector at the PEP-II storage ring, at an e{sup +}e{sup -} center-of-mass energy of 10.6 GeV. The mass dependence of the ratio of electric and magnetic form factors, |G{sub E}/G{sub M}|, is measured for p{bar p} masses below 3 GeV/c{sup 2}; its value is found to be significantly larger than 1 for masses up to 2.2 GeV/c{sup 2}. We also measure J/{psi} {yields} p{bar p} and {psi}(2S) {yields} p{bar p} branching fractions and set an upper limit on Y(4260) {yields} p{bar p} production and decay.

23 pages

### Source

• Journal Name: Physical Review, D (Particles Fields); Journal Volume: 73

### Identifier

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• Report No.: SLAC-PUB-11587
• Grant Number: AC02-76SF00515
• Office of Scientific & Technical Information Report Number: 877515

### Collections

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## When

### Creation Date

• December 13, 2005

### Added to The UNT Digital Library

• Sept. 21, 2016, 2:29 a.m.

### Description Last Updated

• July 25, 2017, 9:41 a.m.

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Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al. A Study of $e^+e^-\to p\bar{p}$ Using Initial StateRadiation with BaBar, article, December 13, 2005; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc881076/: accessed January 22, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.