We present the first observation of exclusive e(+)e(-) production in hadron-hadron collisions, using p (p) over bar collision data at root s=1.96 TeV taken by the run II Collider Detector at Fermilab, and corresponding to an integrated luminosity of 532 pb(-1). We require the absence of any particle signatures in the detector except for an electron and a positron candidate, each with transverse energy E(T)> 5 GeV and pseudorapidity vertical bar eta vertical bar < 2. With these criteria, 16 events are observed compared to a background expectation of 1.9 +/- 0.3 events. These events are consistent in cross section and properties with the QED process p (p) over bar -> p+e(+)e(-)+(p) over bar through two-photon exchange. The measured cross section is 1.6(-0.3)(+0.5)(stat)+/- 0.3(syst) pb. This agrees with the theoretical prediction of 1.71 +/- 0.01 pb.
Observation of exclusive electron-positron production in hadron-hadron collisions / Abulencia, A; Adelman, J; Affolder, T; Akimoto, T; Albrow, Mg; Ambrose, D; Amerio, S; Amidei, D; Anastassov, A; Anikeev, K; Annovi, A; Antos, J; Aoki, M; Apollinari, G; Arguin, Jf; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, A; Azfar, F; AZZI BACCHETTA, P; Azzurri, P; Bacchetta, N; Badgett, W; BARBARO GALTIERI, A; Barnes, Ve; Barnett, Ba; Baroiant, S; Bartsch, V; Bauer, G; Bedeschi, F; Behari, S; Belforte, S; Bellettini, G; Bellinger, J; Belloni, A; Benjamin, D; Beretvas, A; Beringer, J; Berry, T; Bhatti, A; Binkley, M; Bisello, D; Blair, Re; Blocker, C; Blumenfeld, B; Bocci, A; Bodek, A; Boisvert, V; Bolla, G; Bolshov, A; Bortoletto, D; Boudreau, J; Boveia, A; Brau, B; Brigliadori, L; Bromberg, C; Brubaker, E; Budagov, J; Budd, Hs; Budd, S; Budroni, S; Burkett, K; Busetto, G; Bussey, P; Byrum, Kl; Cabrera, S; Campanelli, M; Campbell, M; Canelli, F; Canepa, A; Carillo, S; Carlsmith, D; Caron, B; Carosi, R; 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[10.1103/physrevlett.98.112001]
Observation of exclusive electron-positron production in hadron-hadron collisions
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CHO K; CHOKHELI D; CHOU JP; CHOUDALAKIS G; CHUANG SH; CHUNG K; CHUNG WH; CHUNG YS; CILJAK M; CIOBANU CI; CIOCCI MA; CLARK A; CLARK D; COCA M; COMPOSTELLA G; CONVERY ME; CONWAY J; COOPER B; COPIC K; CORDELLI M; CORTIANA G; CRESCIOLI F; ALMENAR CC; CUEVAS J; CULBERTSON R; CULLY JC; CYR D; DARONCO S; D'AURIA S; DAVIES T; D'ONOFRIO M; DAGENHART D; DE BARBARO P; DE CECCO, Sandro ;DEISHER A; DE LENTDECKER G; DELL'ORSO M; PAOLI FD; DEMORTIER L; DENG J; DENINNO M; DE PEDIS D; DERWENT PF; DI GIOVANNI GP; DIONISI, Carlo ;DI RUZZA B; DITTMANN JR; DITURO P; DORR C; DONATI S; DONEGA M; DONG P; DONINI J; DORIGO T; DUBE S; EFRON J; ERBACHER R; ERREDE D; ERREDE S; EUSEBI R; FANG HC; FARRINGTON S; FEDORKO I; FEDORKO WT; FEILD RG; FEINDT M; FERNANDEZ JP; FIELD R; FLANAGAN G; FOLAND A; FORRESTER S; FOSTER GW; FRANKLIN M; FREEMAN JC; FURIC I; GALLINARO M; GALYARDT J; GARCIA JE; GARBERSON F; GARFINKEL AF; GAY C; GERBERICH H; GERDES D; GIAGU, Stefano ;GIANNETTI P; GIBSON A; GIBSON K; GIMMELL JL; GINSBURG C; 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ROSSIN R; RUIZ A; RUSS J; RUSU V; SAARIKKO H; SABIK S; SAFONOV A; SAKUMOTO WK; SALAMANNA G; SALTO O; SALTZBERG D; SANCHEZ C; SANTI L; SARKAR S; SARTORI L; SATO K; SAVARD P; SAVOY NAVARRO A; SCHEIDLE T; SCHLABACH P; SCHMIDT EE; SCHMIDT MP; SCHMITT M; SCHWARZ T; SCODELLARO L; SCOTT AL; SCRIBANO A; SCURI F; SEDOV A; SEIDEL S; SEIYA Y; SEMENOV A; SEXTON KENNEDY L; SFYRLA A; SHAPIRO MD; SHEARS T; SHEPARD PF; SHERMAN D; SHIMOJIMA M; SHOCHET M; SHON Y; SHREYBER I; SIDOTI A; SINERVO P; SISAKYAN A; SJOLIN J; SLAUGHTER AJ; SLAUNWHITE J; SLIWA K; SMITH JR; SNIDER FD; SNIHUR R; SODERBERG M; SOHA A; SOMALWAR S; SORIN V; SPALDING J; SPINELLA F; SPREITZER T; SQUILLACIOTI P; STANITZKI M; STAVERIS POLYKALAS A; DENIS RS; STELZER B; STELZER CHILTON O; STENTZ D; STROLOGAS J; STUART D; SUH JS; SUKHANOV A; SUN H; SUZUKI T; TAFFARD A; TAKASHIMA R; TAKEUCHI Y; TAKIKAWA K; TANAKA M; TANAKA R; TECCHIO M; TENG PK; TERASHI K; THOM J; THOMPSON AS; THOMSON E; TIPTON P; TIWARI V; TKACZYK S; TOBACK D; TOKAR S; TOLLEFSON K; TOMURA T; TONELLI D; TORRE S; TORRETTA D; TOURNEUR S; TRISCHUK W; TSUCHIYA R; TSUNO S; TURINI N; UKEGAWA F; UNVERHAU T; UOZUMI S; USYNIN D; VALLECORSA S; VAN REMORTEL N; VARGANOV A; VATAGA E; VAZQUEZ F; VELEV G; VERAMENDI G; VESZPREMI V; VIDAL R; VILA I; VILAR R; VINE T; VOLLRATH I; VOLOBOUEV I; VOLPI G; WURTHWEIN F; WAGNER P; WAGNER RG; WAGNER RL; WAGNER J; WAGNER W; WALLNY R; WANG SM; WARBURTON A; WASCHKE S; WATERS D; WESTER WC; WHITEHOUSE B; WHITESON D; WICKLUND AB; WICKLUND E; WILLIAMS G; WILLIAMS HH; WILSON P; WINER BL; WITTICH P; WOLBERS S; WOLFE C; WRIGHT T; WU X; WYNNE SM; YAGIL A; YAMAMOTO K; YAMAOKA J; YAMASHITA T; YANG C; YANG UK; YANG YC; YAO WM; YEH GP; YOH J; YORITA K; YOSHIDA T; YU GB; YU I; YU SS; YUN JC; SORRENTINO, Lucia ;ZANETTI A; ZAW I; ZHANG X; ZHOU J; ZUCCHELLI S.
2007
Abstract
We present the first observation of exclusive e(+)e(-) production in hadron-hadron collisions, using p (p) over bar collision data at root s=1.96 TeV taken by the run II Collider Detector at Fermilab, and corresponding to an integrated luminosity of 532 pb(-1). We require the absence of any particle signatures in the detector except for an electron and a positron candidate, each with transverse energy E(T)> 5 GeV and pseudorapidity vertical bar eta vertical bar < 2. With these criteria, 16 events are observed compared to a background expectation of 1.9 +/- 0.3 events. These events are consistent in cross section and properties with the QED process p (p) over bar -> p+e(+)e(-)+(p) over bar through two-photon exchange. The measured cross section is 1.6(-0.3)(+0.5)(stat)+/- 0.3(syst) pb. This agrees with the theoretical prediction of 1.71 +/- 0.01 pb.
Citazione
Observation of exclusive electron-positron production in hadron-hadron collisions / Abulencia, A; Adelman, J; Affolder, T; Akimoto, T; Albrow, Mg; Ambrose, D; Amerio, S; Amidei, D; Anastassov, A; Anikeev, K; Annovi, A; Antos, J; Aoki, M; Apollinari, G; Arguin, Jf; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, A; Azfar, F; AZZI BACCHETTA, P; Azzurri, P; Bacchetta, N; Badgett, W; BARBARO GALTIERI, A; Barnes, Ve; Barnett, Ba; Baroiant, S; Bartsch, V; Bauer, G; Bedeschi, F; Behari, S; Belforte, S; Bellettini, G; Bellinger, J; Belloni, A; Benjamin, D; Beretvas, A; Beringer, J; Berry, T; Bhatti, A; Binkley, M; Bisello, D; Blair, Re; Blocker, C; Blumenfeld, B; Bocci, A; Bodek, A; Boisvert, V; Bolla, G; Bolshov, A; Bortoletto, D; Boudreau, J; Boveia, A; Brau, B; Brigliadori, L; Bromberg, C; Brubaker, E; Budagov, J; Budd, Hs; Budd, S; Budroni, S; Burkett, K; Busetto, G; Bussey, P; Byrum, Kl; Cabrera, S; Campanelli, M; Campbell, M; Canelli, F; Canepa, A; Carillo, S; Carlsmith, D; Caron, B; Carosi, R; 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[10.1103/physrevlett.98.112001]
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Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande. La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.