Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F17%3A00482520" target="_blank" >RIV/61389005:_____/17:00482520 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/17:00318157
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevC.96.054904" target="_blank" >http://dx.doi.org/10.1103/PhysRevC.96.054904</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.96.054904" target="_blank" >10.1103/PhysRevC.96.054904</a>
Alternative languages
Result language
angličtina
Original language name
Coherent diffractive photoproduction of rho(0) mesons on gold nuclei at 200 GeV/nucleon-pair at the Relativistic Heavy Ion Collider
Original language description
The STAR Collaboration reports on the photoproduction of pi(+) pi(-) pairs in gold-gold collisions at a center-of-mass energy of 200 GeV/nucleon-pair. These pion pairs are produced when a nearly real photon emitted by one ion scatters from the other ion. nWe fit the pi(+) pi(-) invariant-mass spectrum with a combination of rho(0) and omega resonances and a direct pi(+) pi(-) continuum. This is the first observation of the omega in ultraperipheral collisions, and the first measurement of rho-omega interference at energies where photoproduction is dominated by Pomeron exchange. The omega amplitude is consistent with the measured gamma p -> omega p cross section, a classical Glauber calculation, and the omega -> pi(+) pi(-) branching ratio. The omega phase angle is similar to that observed at much lower energies, showing that the rho-omega phase difference does not depend significantly on photon energy. nThe rho(0) differential cross section d sigma/dt exhibits a clear diffraction pattern, compatible with scattering from a gold nucleus, with two minima visible. The positions of the diffractive minima agree better with the predictions of a quantum Glauber calculation that does not include nuclear shadowing than with a calculation that does include shadowing.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review C
ISSN
2469-9985
e-ISSN
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Volume of the periodical
96
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
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UT code for WoS article
000414957500004
EID of the result in the Scopus database
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