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Titolo:
ELASTIC AND PROTON-DISSOCIATIVE RHO(0) PHOTOPRODUCTION AT HERA
Autore:
BREITWEG J; DERRICK M; KRAKAUER D; MAGILL S; MIKUNAS D; MUSGRAVE B; REPOND J; STANEK R; TALAGA RL; YOSHIDA R; ZHANG H; MATTINGLY MCK; ANSELMO F; ANTONIOLI P; BARI G; BASILE M; BELLAGAMBA L; BOSCHERINI D; BRUNI A; BRUNI G; ROMEO GC; CASTELLINI G; CHIARINI M; CIFARELLI L; CINDOLO F; CONTIN A; CORRADI M; DEPASQUALE S; GIALAS I; GIUSTI P; IACOBUCCI G; LAURENTI G; LEVI G; MARGOTTI A; MASSAM T; NANIA R; NEMOZ C; PALMONARI F; PESCI A; POLINI A; RICCI F; SARTORELLI G; GARCIA YZ; ZICHICHI A; AMELUNG C; BORNHEIM A; BROCK I; COBOKEN K; CRITTENDEN J; DEFFNER R; ECKERT M; GROTHE M; HARTMANN H; HEINLOTH K; HEINZ L; HILGER E; JAKOB HP; KATZ UF; KERGER R; PAUL E; PFEIFFER M; REMBSER C; STAMM J; WEDEMEYER R; WIEBER H; BAILEY DS; CAMPBELLROBSON S; COTTINGHAM WN; HALLWILTON R; HAYES ME; HEATH GP; HEATH GP; MCFALL JD; PICCIONI D; ROFF DG; TAPPER RJ; ARNEODO M; AYAD R; CAPUA M; GARFAGNINI A; IANNOTTI L; SCHIOPPA M; SUSINNO G; KIM JY; LEE JH; LIM IT; PAC MY; CALDWELL A; CARTIGLIA N; JING Z; LIU W; MELLADO B; PARSONS JA; RITZ S; SAMPSON S; SCIULLI F; STRAUB PB; ZHU Q; BORZEMSKI P; CHWASTOWSKI J; ESKREYS A; FIGIEL J; KLIMEK K; PRZYBYCIEN MB; ZAWIEJSKI L; ADAMCZYK L; BEDNAREK B; BUKOWY M; CZERMAK A; JELEN K; KISIELEWSKA D; KOWALSKI T; PRZYBYCIEN M; RULIKOWSKAZAREBSKA E; SUSZYCKI L; ZAJAC J; DULINSKI Z; KOTANSKI A; ABBIENDI G; BAUERDICK LAT; BEHRENS U; BEIER H; BIENLEIN JK; CASES G; DEPPE O; DESLER K; DREWS G; FRICKE U; GILKINSON DJ; GLASMAN C; GOTTLICHER P; HAAS T; HAIN W; HASELL D; JOHNSON KF; KASEMANN M; KOCH W; KOTZ U; KOWALSKI H; LABS J; LINDEMANN L; LOHR B; LOWE M; MANCZAK O; MILEWSKI J; MONTEIRO T; NG JST; NOTZ D; OHRENBERG K; PARK IH; PELLEGRINO A; PELUCCHI F; PIOTRZKOWSKI K; ROCO M; ROHDE M; ROLDAN J; RYAN JJ; SAVIN AA; SCHNEEKLOTH U; SCHWARZER O; SELONKE F; SURROW B; TASSI E; VOSS T; WESTPHAL D; WOLF G; WOLLMER U; YOUNGMAN C; ZARNECKI AF; ZEUNER W; BUROW BD; GRABOSCH HJ; MEYER A; SCHLENSTEDT S; BARBAGLI G; GALLO E; PELFER P; ANZIVINO G; MACCARRONE G; VOTANO L; BAMBERGER A; EISENHARDT S; MARKUN P; TREFZGER T; WOLFLE S; BROMLEY JT; BROOK NH; BUSSEY PJ; DOYLE AT; MACDONALD N; SAXON DH; SINCLAIR LE; STRICKLAND E; WAUGH R; BOHNET I; GENDNER N; HOLM U; MEYERLARSEN A; SALEHI H; WICK K; GLADILIN LK; HORSTMANN D; KCIRA D; KLANNER R; LOHRMANN E; POELZ G; SCHOTT W; ZETSCHE F; BACON TC; BUTTERWORTH I; COLE JE; HOWELL G; HUNG BHY; LAMBERTI L; LONG KR; MIILLER DB; PAVEL N; PRINIAS A; SEDGBEER JK; SIDERIS D; WALKER R; MALLIK U; WANG SM; WU JT; CLOTH P; FILGES D; FLECK JI; ISHII T; KUZE M; SUZUKI I; TOKUSHUKU K; YAMADA S; YAMAUCHI K; YAMAZAKI Y; HONG SJ; LEE SB; NAM SW; PARK SK; BARREIRO F; FERNANDEZ JP; GARCIA G; GRACIANI R; HERNANDEZ JM; HERVAS L; LABARGA L; MARTINEZ M; DELPESO J; PUGA J; TERRON J; DETROCONIZ JF; CORRIVEAU F; HANNA DS; HARTMANN J; HUNG LW; MURRAY WN; OCHS A; RIVELINE M; STAIRS DG; STLAURENT M; ULLMANN R; TSURUGAI T; BASHKIROV V; DOLGOSHEIN BA; STIFUTKIN A; BASHINDZHAGYAN GL; ERMOLOV PF; GOLUBKOV YA; KHEIN LA; KOROTKOVA NA; KORZHAVINA IA; KUZMIN VA; LUKINA OY; PROSKURYAKOV AS; SHCHEGLOVA LM; SOLOMIN AN; ZOTKIN SA; BOKEL C; BOTJE M; BRUMMER N; CHLEBANA F; ENGELEN J; KOFFEMAN E; KOOIJMAN P; VANSIGHEM A; TIECKE H; TUNING N; VERKERKE W; VOSSEBELD J; VREESWIJK M; WIGGERS L; DEWOLF E; ACOSTA D; BYLSMA B; DURKIN LS; GILMORE J; GINSBURG CM; KIM CL; LING TY; NYLANDER P; ROMANOWSKI TA; BLAIKLEY HE; CASHMORE RJ; COOPERSARKAR AM; DEVENISH RCE; EDMONDS JK; GROSSEKNETTER J; HARNEW N; NATH C; NOYES VA; QUADT A; RUSKE O; TICKNER JR; UIJTERWAAL H; WALCZAK R; WATERS DS; BERTOLIN A; BRUGNERA R; CARLIN R; DALCORSO F; DOSSELLI U; LIMENTANI S; MORANDIN M; POSOCCO M; STANCO L; STROILI R; VOCI C; BULMAHN J; OH BY; OKRASINSKI JR; TOOTHACKER WS; WHITMORE JJ; IGA Y; DAGOSTINI G; MARINI G; NIGRO A; RASO M; HART JC; MCCUBBIN NA; SHAH TP; BARBERIS E; EPPERSON D; HEUSCH C; RAHN JT; SADROZINSKI HFW; SEIDEN A; WICHMANN R; WILLIAMS DC; ABRAMOWICZ H; BRISKIN G; DAGAN S; KANANOV S; LEVY A; ABE T; FUSAYASU T; INUZUKA M; NAGANO K; UMEMORI K; YAMASHITA T; HAMATSU R; HIROSE T; HOMMA K; KITAMURA S; MATSUSHITA T; CIRIO R; COSTA M; FERRERO MI; MASELLI S; MONACO V; PERONI C; PETRUCCI MC; RUSPA M; SACCHI R; SOLANO A; STAIANO A; DARDO M; BAILEY DC; FAGERSTROEM CP; GALEA R; HARTNER GF; JOO KK; LEVMAN GM; MARTIN JF; ORR RS; POLENZ S; SABETFAKHRI A; SIMMONS D; TEUSCHER RJ; BUTTERWORTH JM; CATTERALL CD; JONES TW; LANE JB; SAUNDERS RL; SUTTON MR; WING M; CIBOROWSKI J; GRZELAK G; KASPRZAK M; MUCHOROWSKI K; NOWAK RJ; PAWLAK JM; PAWLAK R; TYMIENIECKA T; WROBLEWSKI AK; ZAKRZEWSKI JA; ADAMUS M; COLDEWEY C; EISENBERG Y; HOCHMAN D; KARSHON U; BADGETT WF; CHAPIN D; CROSS R; DASU S; FOUDAS C; LOVELESS RJ; MATTINGLY S; REEDER DD; SMITH WH; VAICIULIS A; WODARCZYK M; DESHPANDE A; DHAWAN S; HUGHES VW; BHADRA S; FRISKEN WR; KHAKZAD M; SCHMIDKE WB;
Indirizzi:
ARGONNE NATL LAB,9700 S CASS AVE ARGONNE IL 60439 ANDREWS UNIV BERRIEN SPRINGS MI 49104 UNIV BOLOGNA BOLOGNA ITALY IST NAZL FIS NUCL I-40126 BOLOGNA ITALY UNIV BONN,INST PHYS D-5300 BONN GERMANY UNIV BRISTOL,HH WILLS PHYS LAB BRISTOL BS8 1TL AVON ENGLAND UNIV CALABRIA,DEPT PHYS I-87036 COSENZA ITALY INFN I-87036 COSENZA ITALY CHONNAM NATL UNIV KWANGJU SOUTH KOREA COLUMBIA UNIV,NEVIS LABS IRVINGTON NY 00000 INST NUCL PHYS KRAKOW POLAND ACAD MIN & MET,FAC PHYS & NUCL TECH KRAKOW POLAND JAGIELLONIAN UNIV,DEPT PHYS KRAKOW POLAND DESY D-2000 HAMBURG GERMANY DESY,IFH ZEUTHEN GERMANY UNIV FLORENCE FLORENCE ITALY IST NAZL FIS NUCL I-50125 FLORENCE ITALY IST NAZL FIS NUCL,LAB NAZL FRASCATI I-00044 FRASCATI ITALY UNIV FREIBURG,FAK PHYS D-7800 FREIBURG GERMANY UNIV GLASGOW,DEPT PHYS & ASTRON GLASGOW LANARK SCOTLAND UNIV HAMBURG,INST EXPT PHYS 1 HAMBURG GERMANY UNIV HAMBURG,INST EXPT PHYS 2 HAMBURG GERMANY UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,HIGH ENERGY NUCL PHYS GRPLONDON ENGLAND UNIV IOWA,DEPT PHYS & ASTRON IOWA CITY IA 52242 KFA JULICH GMBH,FORSCHUNGSZENTRUM,INST KERNPHYS JULICH GERMANY KEK,INST PARTICLE & NUCL STUDIES TSUKUBA IBARAKI JAPAN KOREA UNIV SEOUL 136701 SOUTH KOREA UNIV AUTONOMA MADRID,DEPT FIS TEOR MADRID SPAIN MCGILL UNIV,DEPT PHYS MONTREAL PQ CANADA MEIJI GAKUIN UNIV,FAC GEN EDUC YOKOHAMA KANAGAWA JAPAN MOSCOW PHYS ENGN INST MOSCOW RUSSIA MOSCOW MV LOMONOSOV STATE UNIV,INST NUCL PHYS MOSCOW RUSSIA NIKHEF H NL-1009 DB AMSTERDAM NETHERLANDS UNIV AMSTERDAM AMSTERDAM NETHERLANDS OHIO STATE UNIV,DEPT PHYS COLUMBUS OH 43210 UNIV OXFORD,DEPT PHYS OXFORD ENGLAND UNIV PADUA,DIPARTIMENTO FIS PADUA ITALY IST NAZL FIS NUCL PADUA ITALY PENN STATE UNIV,DEPT PHYS UNIVERSITY PK PA 16802 POLYTECH UNIV SAGAMIHARA KANAGAWA JAPAN UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS I-00185 ROME ITALY IST NAZL FIS NUCL ROME ITALY RUTHERFORD APPLETON LAB DIDCOT OX11 0QX OXON ENGLAND UNIV CALIF SANTA CRUZ SANTA CRUZ CA 95064 TEL AVIV UNIV,RAYMOND & BEVERLY SACKLER FAC EXACT SCI,SCH PHYS IL-69978 TEL AVIV ISRAEL UNIV TOKYO,DEPT PHYS TOKYO 113 JAPAN TOKYO METROPOLITAN UNIV,DEPT PHYS TOKYO JAPAN UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE TURIN ITALY UNIV TURIN,FAC SCI 2 TURIN ITALY IST NAZL FIS NUCL I-10125 TURIN ITALY INFN ALESSANDRA ITALY UNIV TORONTO,DEPT PHYS TORONTO ON CANADA UNIV COLL LONDON,DEPT PHYS & ASTRON LONDON ENGLAND WARSAW UNIV,INST PHYS EXPT WARSAW POLAND INST NUCL STUDIES PL-00681 WARSAW POLAND WEIZMANN INST SCI,DEPT PARTICLE PHYS REHOVOT ISRAEL UNIV WISCONSIN,DEPT PHYS MADISON WI 53706 YALE UNIV,DEPT PHYS NEW HAVEN CT 00000 YORK UNIV,DEPT PHYS N YORK ON M3J 1P3 CANADA CNR,IROE I-50127 FLORENCE ITALY
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS
fascicolo: 2, volume: 2, anno: 1998,
pagine: 247 - 267
SICI:
1434-6044(1998)2:2<247:EAPRPA>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
DOUBLE DIFFRACTION DISSOCIATION; CENTRAL TRACKING DETECTOR; ZEUS BARREL CALORIMETER; CERN SPS COLLIDER; OF-MASS ENERGY; CROSS-SECTIONS; SCATTERING; DESIGN; CONSTRUCTION; ISR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
88
Recensione:
Indirizzi per estratti:
Citazione:
J. Breitweg et al., "ELASTIC AND PROTON-DISSOCIATIVE RHO(0) PHOTOPRODUCTION AT HERA", EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS, 2(2), 1998, pp. 247-267

Abstract

Elastic and proton-dissociative p(o) photoproduction (gamma p --> rho(o)p, gamma p --> rho(o)N, respectively, with rho(o) --> pi(+)pi(-)) has been studied in ep interactions at HERA for photon-proton centre-of-mass energies in the range 50 < W < 100 GeV and for \t\ < 0.5 GeV2, where t is the square of the four-momentum transfer at the proton vertex; the results on the proton-dissociative reaction are presented for masses of the dissociated proton system in the range M-N(2) < 0.1W(2). For the elastic process, the pi(+)pi(-) invariant mass spectrum has been investigated as a function of t. As in fixed target experiments, the rho(o) resonance shape is asymmetric; this asymmetry decreases with increasing \t\, as expected in models in which the asymmetry is ascribed to the interference of resonant and non-resonant pi(+)pi(-) production. The cross section has been studied as a function of W; a fit to the resonant part with the form W-a gives a = 0.16 +/- 0.06 (stat. )(-0.15)(+0.11) (syst.). The resonant part of the gamma p --> pi(+)pi(-) p cross section is 11.2 +/- 0.1 (stat. )(-1.2)(+1.1)(syst.) mu b at [W] =71.7 GeV. The t dependence of the cross section can be described by afunction of the type A(rho) exp (-b(rho)\t\ + c(p)t(2)) with b(rho) =10.9 +/- 0.3 (stat. )(-0.5)(+1.0) (syst. ) GeV-2 and c(rho) = 2.7 +/- 0.9 (stat. )(-1.7)(+1.9) (syst. ) GeV-4. The t dependence has also been studied as a function of W and a value of the slope of the pomeron trajectory alpha(IP)' = 0.23 +/- 0.15 (stat. )(-0.07)(+0.10), (syst. ) GeV-2has been deduced. The rho(o) spin density matrix elements r(00)(04), r(1-1)(04) and Re[r(10)(04)] have been measured and found to be consistent with expectations based on s-channel helicity conservation. For proton-dissociative pi(+)pi(-) photoproduction in the rho(o) mass range, the distributions of the two-pion invariant mass, Wi and the polar and azimuthal angles of the pions in the helicity frame are the same within errors as those for the elastic process. The t distribution has been fitted to an exponential function with a slope parameter 5.8 +/- 0.3 (stat.) +/- 0.5 (syst. ) GeV-2. The ratio of the elastic to proton-dissociative rho(o) photoproduction cross section is 2.0 +/- 0.2 (stat.) +/- 0.7 (syst.).

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Documento generato il 26/11/20 alle ore 20:23:40