6533b824fe1ef96bd128092f
RESEARCH PRODUCT
Low-momentum direct-photon measurement in Cu + Cu collisions at sNN=200GeV
K. S. JooC. A. OgilvieT. K. HemmickO. DietzschYasuo MiakeE. T. AtomssaH. ValleJ. G. BoissevainC. P. WongT. RinnMasashi KanetaM. ConnorsW. A. ZajcSteven E. SkutnikL. KochendaD. KawallS. EsumiV. BaublisJulia VelkovskaA. DenisovV. CiancioloS. BatheS. BatheT. O. S. HaselerV. I. KochetkovAgneta OskarssonJohn Matthew DurhamM. RosatiK. S. SimV. DzhordzhadzeY. BerdnikovY. AkibaM. MishraC. PinkenburgK. DehmeltK. DehmeltC. L. WoodyA. BerdnikovSergey FokinTae-yeon LeeM. Grosse PerdekampG. MitsukaH. QuJunji TojoY. KwonY. KwonS. NagamiyaVaclav VrbaVaclav VrbaKlaus Johannes ReygersK. HillY. FukaoS. ParkS. ParkJ. MurataMartin PurschkeC. A. AidalaC. A. AidalaA. ShevelA. ShevelS. HasegawaHideki HamagakiW. FanK. AokiH. HiejimaM. StepanovG. RocheA. A. VinogradovK. O. EyserK. O. EyserA. K. PurwarK. DasK. FujiwaraE. P. HartouniA. KissA. BagolyG. S. KyleGerd Joachim KundeC. P. SinghZ. YasinH. W. Van HeckeT. HoraguchiHenner BueschingS. P. SorensenJames AlexanderDylan WalkerHerve BorelN. KamiharaR. ArmendarizT. MajorosJiangyong JiaJiangyong JiaJiangyong JiaY. GotoK. ImaiK. ImaiJ. T. MitchellN. HotvedtR. SeidlN. A. LewisI. SheinPetr GallusMarcus HohlmannR. AverbeckA. IsupovC. SuireS. KametaniS. KametaniT. HesterM. J. SkobyD. SharmaD. SharmaByung-sik HongA. BazilevskyA. MorrealeVladislav MankoA. TaketaniA. DreesJ. SziklaiZ. FraenkelV. L. RykovT. DahmsJ. G. LajoiePhilippe RosnetV. KhachatryanM. B. DeatonS. CampbellS. CampbellAnne Marie SicklesAnne Marie SicklesP. TarjánAlberto BaldisseriC. L. SilvaC. L. SilvaS. BelikovJ. KubartJ. KubartH. A. GustafssonJ. H. KangJ. S. HaggertyI. V. SourikovaBrian ColeA. RomanaR. S. TowellJ. S. BokD. KotchetkovD. KotchetkovL. ZouAlexandre LebedevM. AlfredT. HachiyaT. HachiyaI. GarishviliI. GarishviliAkio KiyomichiF. WeiF. WeiA. Hadj HenniC. ZhangY. TanakaMasamichi IshiharaD. E. FieldsT. L. ThomasB. AzmounY. J. MaoA. KrálC. R. ClevenC. HaegemannY. InoueJohn HillB. V. JacakM. J. KweonM. K. LeeD. M. LeeG. R. YoungN. KuriharaMinghui LiuV-n. TramE. J. DesmondO. ZaudtkeC. ValeB. S. ChangA. KravitzD. KotovD. KotovRyugo S. HayanoM. NaglisM. GoninT. HoshinoNagahiro SaitoH. A. ToriiT. Sugitate45J. KlayH. YuJ. EgdemirL. D. IsenhowerF. StaleyL. BaksayM. HeffnerKenneth Francis ReadKenneth Francis ReadT. IchiharaViktor RiabovViktor RiabovM. FingerM. FingerY. RiabovY. RiabovJ. BryslawskyjWei XieM. MccumberM. MccumberC. Y. ChiM. OkaCharles MaguireB. KurgyisM. TogawaJan RakJan RakY. UedaR. LaceyDong-hun KimA. V. KazantsevKenta ShigakiM. NguyenJ. ParkV. S. PantuevA. DionF. MatathiasJason KaminK. KuritaKiyoshi TanidaKiyoshi TanidaY. S. LaiKensuke HommaR. Granier De CassagnacA. AdareE. KistenevH. PereiraMotoi InabaJ. D. Orjuela KoopT. TabaruD. RichfordA. S. NyaninM. SarsourM. CsanadS. P. StollA. RakotozafindrabeM. SluneckaM. SluneckaR. BelmontL. TomášekZ. SunP. MikešP. MikešA. EnokizonoA. EnokizonoSaskia MioduszewskiP. ConstantinS. ChernichenkoY. H. LeungB. KomkovH. HaradaD. E. MihalikJ. GossetI. J. ChoiI. J. ChoiRachid NouicerH. PeiG. DavidG. DavidJ. H. DoB. BassalleckR. PakH. IinumaY. TsuchimotoD. McglincheyD. McglincheyBalazs UjvariM. KonnoSenta GreeneFrançois FleuretK. OkadaHiroaki OhnishiS. S.e. RosendahlT. C. AwesKyoichiro OzawaKyoichiro OzawaT. LiškaN. N. AjitanandA. P.t. PalounekJ. JinI. E. YushmanovEun-hee KimG. BunceH. En'yoDavid D'enterriaJun KikuchiAlexei KhanzadeevL. AphecetcheE. M. TakaguiY. NakamiyaD. LynchM. J. LeitchTadaaki IsobeI. RavinovichE. StenlundH. SakataN. NovitzkyZ. RowanS. N. WhiteA. DeshpandeM. OuchidaG. BaksayTakahiro NakamuraP. L. McgaugheyM. A. L. LeiteB. E. NormanJ. AsaiE. O'brienM. ChiuM. ChiuY. NagataS. YokkaichiA. ChurynD. JouanB. SahlmuellerB. SahlmuellerSusumu OdaD. V. PerepelitsaJohannes Peter WesselsXingguo LiM. N. WagnerShingo SakaiT. V. MoukhanovaR. A. SoltzA. DurumR. VértesiR. VértesiS. H. LeeM. IssahD. WatanabeH. GeK. NakanoM. D. MalikE. VznuzdaevY. WatanabeJ. D. OsbornJ. E. FrantzJ. E. FrantzV. BabintsevW. E. SondheimI. YounusI. YounusR. BennettJen-chieh PengK. BoyleP. A. RukoyatkinA. SoldatovOsamu JinnouchiMatthew G. ReuterTakahiro FusayasuZ. JiD. WinterHiroyuki SakoD. Yu PeressounkoXiong WangAlexander MalakhovQiao XuDong Jo KimDong Jo KimD. SilvermyrD. SilvermyrL. S. ZolinW. J. ParkS. H. LimS. H. LimP. D. BarnesA. YanovichJ. ChibaAlice MignereyM. WysockiM. WysockiM. MitrovskiJ. HuangTakao SakaguchiI. TserruyaYu. EfremenkoC. Klein-boesingA. D. FrawleyPrakhar GargPrakhar GargV. SinghA. HodgesS. H. AronsonW. HolzmannS. F. PateMaya Hachiya ShimomuraMaya Hachiya ShimomuraMaya Hachiya ShimomuraY. I. MakdisiS. ButsykS. ButsykVladimir SamsonovVladimir SamsonovH. Al-batainehA. GlennA. GlennP. V. RadzevichM. J. TannenbaumB. K. SchmollEunja KimD. IvanishchevJaehyeok YooD. MukhopadhyayS. RembeczkiV. PapavassiliouSébastien GadratAlexander MilovAlexander MilovI. NakagawaC. E. PerezlaraEva HaslumO. DrapierFrank EllinghausB. LenziE. R. KinneyRobert F. HobbsD. P. MorrisonV. E. SemenovTatsuya ChujoTatsuya ChujoS. AfanasievTamas Ferenc CsorgoA. SterN. FeegeS. I. MorrowJ. NewbyDebashish PalS. SawadaJ. YingA. FranzJ. RuncheyB. M. JohnsonB. M. JohnsonJ. L. NagleD. HornbackC. SilvestreA. TaranenkoA. TaranenkoMarisilvia DonadelliV. BumazhnovM. P. CometsKazushi MikiT. A. ShibataD. KincsesMin Soo KimD. IsenhowerA. ToiaTamas NovakT. MoonL. MašekL. MašekJ. L. CharvetRushan HanT. E. MillerKei NagashimaV. Canoa RomanP. ChungRaphael Noel TieulentSusumu SatoW. S. EmamH. KanouTaku GunjiH. GongJ. SeeleM. PatelF. KajiharaH. DelagrangeS. ZhouM. ViriusS. TakagiM. BoerSándor LökösK. N. BarishS. ZharkoM. L. BrooksB. LoveY. L. YamaguchiY. L. YamaguchiC. XuA. G. LitvinenkoA. KozlovR. SetoK. HarunaT. W. DanleyX. HeJ. ZimamyiO. O. OmiwadeV. PeresedovS. BatsouliH. MasuiA. K. DubeyA. A. BickleyN. GrauN. GrauK. ShojiW. PengP. W. Stankussubject
PhysicsPhotonMass distribution010308 nuclear & particles physicsHadronVirtual particle01 natural sciencesSpectral lineNuclear physicsMomentum0103 physical sciencesMass spectrumRapidityNuclear Experiment010306 general physicsdescription
We measured direct photons for pT<5GeV/c in minimum bias and 0%–40% most-central events at midrapidity for Cu+Cu collisions at sNN=200GeV. The e+e− contribution from quasireal direct virtual photons has been determined as an excess over the known hadronic contributions in the e+e− mass distribution. A clear enhancement of photons over the binary scaled p+p fit is observed for pT<4GeV/c in Cu+Cu data. The pT spectra are consistent with the Au+Au data covering a similar number of participants. The inverse slopes of the exponential fits to the excess after subtraction of the p+p baseline are 285±53(stat)±57(syst)MeV/c and 333±72(stat)±45(syst)MeV/c for minimum bias and 0%–40% most-central events, respectively. The rapidity density, dN/dy, of photons demonstrates the same power law as a function of dNch/dη observed in Au+Au at the same collision energy.
year | journal | country | edition | language |
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2018-11-15 | Physical Review C |