Show simple item record

dc.contributor.author
H1 Collaboration
dc.contributor.author
Andreev, Vladimir F.
dc.contributor.author
Grab, Christophorus
dc.contributor.author
et al.
dc.date.accessioned
2021-01-11T07:09:54Z
dc.date.available
2020-12-30T03:52:46Z
dc.date.available
2021-01-11T07:09:54Z
dc.date.issued
2020-12-23
dc.identifier.issn
1434-6044
dc.identifier.issn
1434-6052
dc.identifier.other
10.1140/epjc/s10052-020-08587-3
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/458720
dc.identifier.doi
10.3929/ethz-b-000458720
dc.description.abstract
Exclusive photoproduction of ρ(770) mesons is studied using the H1 detector at the ep collider HERA. A sample of about 900,000 events is used to measure single- and double-differential cross sections for the reaction γp→ π+π-Y. Reactions where the proton stays intact (mY= mp) are statistically separated from those where the proton dissociates to a low-mass hadronic system (mp<mY<10GeV). The double-differential cross sections are measured as a function of the invariant mass mππ of the decay pions and the squared 4-momentum transfer t at the proton vertex. The measurements are presented in various bins of the photon–proton collision energy Wγp. The phase space restrictions are 0.5≤mππ≤2.2GeV, |t|≤1.5GeV2, and 20≤Wγp≤80GeV. Cross section measurements are presented for both elastic and proton-dissociative scattering. The observed cross section dependencies are described by analytic functions. Parametrising the mππ dependence with resonant and non-resonant contributions added at the amplitude level leads to a measurement of the ρ(770) meson mass and width at mρ=770.8-2.7+2.6(tot.)MeV and Γρ=151.3-3.6+2.7(tot.)MeV, respectively. The model is used to extract the ρ(770) contribution to the π+π- cross sections and measure it as a function of t and Wγp. In a Regge asymptotic limit in which one Regge trajectory α(t) dominates, the intercept α(t=0)=1.0654-0.0067+0.0098(tot.) and the slope α′(t=0)=0.233-0.074+0.067(tot.)GeV-2 of the t dependence are extracted for the case mY= mp.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
Measurement of exclusive π+π− and ρ0 meson photoproduction at HERA
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
ethz.journal.title
The European Physical Journal C
ethz.journal.volume
80
en_US
ethz.journal.issue
12
en_US
ethz.journal.abbreviated
Eur. Phys. J. C
ethz.pages.start
1189
en_US
ethz.size
54 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Berlin; Heidelberg
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::08803 - Grab, Christoph (Tit.Prof.)
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::08803 - Grab, Christoph (Tit.Prof.)
ethz.date.deposited
2020-12-30T03:52:53Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-01-11T07:10:03Z
ethz.rosetta.lastUpdated
2021-02-15T23:03:42Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.atitle=Measurement%20of%20exclusive%20%CF%80+%CF%80%E2%88%92%20and%20%CF%810%20meson%20photoproduction%20at%20HERA&amp;rft.jtitle=The%20European%20Physical%20Journal%20C&amp;rft.date=2020-12-23&amp;rft.volume=80&amp;rft.issue=12&amp;rft.spage=1189&amp;rft.issn=1434-6044&amp;1434-6052&amp;rft.au=H1%20Collaboration&amp;Andreev,%20Vladimir%20F.&amp;Grab,%20Christophorus&amp;et%20al.&amp;rft.genre=article&amp;rft_id=info:doi/10.1140/epjc/s10052-020-08587-3&amp;
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record