We present a measurement of the ratio of the t (t) over bar production cross section via gluon-gluon fusion to the total t (t) over bar production cross section in p (p) over bar collisions at root s = 1.96 Tev at the Tevatron. Using a data sample with an integrated luminosity of 955 pb(-1) recorded by the CDF II detector at Fermilab, we select events based on the t (t) over bar decay to lepton + jets. Using an artificial neural network technique we discriminate between t (t) over bar events produced via q (q) over bar annihilation and gg fusion, and find G(f) = sigma(gg -> t (t) over bar/sigma(p (p) over bar -> t (t) over bar) < 0.33 at the 68% confidence level. This result is combined with a previous measurement to obtain the most stringent measurement of this quantity by CDF to date, G(f) = 0.07(-0.07)(+0.15).
Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev / Aaltonen, T; Adelman, J; Akimoto, T; Albrow, Mg; Gonzalez, Ba; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Apresyan, A; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, A; Aurisano, A; Azfar, F; Azzurri, P; Badgett, W; BARBARO GALTIERI, A; Barnes, Ve; Barnett, Ba; Bartsch, V; Bauer, G; Beauchemin, Ph; Bedeschi, F; Bednar, P; Beecher, D; Behari, S; Bellettini, G; Bellinger, J; Benjamin, D; Beretvas, A; Beringer, J; Bhatti, A; Binkley, M; Bisello, D; Bizjak, I; Blair, Re; Blocker, C; Blumenfeld, B; Bocci, A; Bodek, A; Boisvert, V; Bolla, G; Bortoletto, D; Boudreau, J; Boveia, A; Brau, B; Bridgeman, A; Brigliadori, L; Bromberg, C; Brubaker, E; Budagov, J; Budd, Hs; Budd, S; Burkett, K; Busetto, G; Bussey, P; Buzatu, A; Byrum, Kl; Cabrera, S; Calancha, C; Campanelli, M; Campbell, M; Canelli, F; Canepa, A; Carlsmith, D; Carosi, R; Carrillo, S; 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[10.1103/physrevd.79.031101]
Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev
AALTONEN T; ADELMAN J; AKIMOTO T; ALBROW MG; GONZALEZ BA; AMERIO S; AMIDEI D; ANASTASSOV A; ANNOVI A; ANTOS J; APOLLINARI G; APRESYAN A; ARISAWA T; ARTIKOV A; ASHMANSKAS W; ATTAL A; AURISANO A; AZFAR F; AZZURRI P; BADGETT W; BARBARO GALTIERI A; BARNES VE; BARNETT BA; BARTSCH V; BAUER G; BEAUCHEMIN PH; BEDESCHI F; BEDNAR P; BEECHER D; BEHARI S; BELLETTINI G; BELLINGER J; BENJAMIN D; BERETVAS A; BERINGER J; BHATTI A; BINKLEY M; BISELLO D; BIZJAK I; BLAIR RE; BLOCKER C; BLUMENFELD B; BOCCI A; BODEK A; BOISVERT V; BOLLA G; BORTOLETTO D; BOUDREAU J; BOVEIA A; BRAU B; BRIDGEMAN A; BRIGLIADORI L; BROMBERG C; BRUBAKER E; BUDAGOV J; BUDD HS; BUDD S; BURKETT K; BUSETTO G; BUSSEY P; BUZATU A; BYRUM KL; CABRERA S; CALANCHA C; CAMPANELLI M; CAMPBELL M; CANELLI F; CANEPA A; CARLSMITH D; CAROSI R; CARRILLO S; CARRON S; CASAL B; CASARSA M; CASTRO A; CATASTINI P; CAUZ D; CAVALIERE V; CAVALLI SFORZA M; CERRI A; CERRITO L; CHANG SH; CHEN YC; CHERTOK M; CHIARELLI G; CHLACHIDZE G; CHLEBANA F; CHO K; CHOKHELI D; CHOU JP; CHOUDALAKIS G; CHUANG SH; CHUNG K; CHUNG WH; CHUNG YS; CIOBANU CI; CIOCCI MA; CLARK A; CLARK D; COMPOSTELLA G; CONVERY ME; CONWAY J; COPIC K; CORDELLI M; CORTIANA G; COX DJ; CRESCIOLI F; ALMENAR CC; CUEVAS J; CULBERTSON R; CULLY JC; DAGENHART D; DATTA M; DAVIES T; DE BARBARO P; DE CECCO, Sandro ;DEISHER A; DE LORENZO G; DELL'ORSO M; DELUCA C; DEMORTIER L; DENG J; DENINNO M; DERWENT PF; DI GIOVANNI GP; DIONISI, Carlo ;DI RUZZA B; DITTMANN JR; D'ONOFRIO M; DONATI S; DONG P; DONINI J; DORIGO T; DUBE S; EFRON J; ELAGIN A; ERBACHER R; ERREDE D; ERREDE S; EUSEBI R; FANG HC; FARRINGTON S; FEDORKO WT; FEILD RG; FEINDT M; FERNANDEZ JP; FERRAZZA C; FIELD R; FLANAGAN G; FORREST R; FRANKLIN M; FREEMAN JC; FURIC I; GALLINARO M; GALYARDT J; GARBERSON F; GARCIA JE; GARFINKEL AF; GENSER K; GERBERICH H; GERDES D; GESSLER A; GIAGU, Stefano ;GIAKOUMOPOULOU V; GIANNETTI P; GIBSON K; GIMMELL JL; GINSBURG CM; GIOKARIS N; GIORDANI M; GIROMINI P; GIUNTA M; GIURGIU G; GLAGOLEV V; GLENZINSKI D; GOLD M; GOLDSCHMIDT N; GOLOSSANOV A; GOMEZ G; GOMEZ CEBALLOS G; GONCHAROV M; MARGAROLI, Fabrizio ;GORELOV I; GOSHAW AT; GOULIANOS K; GRESELE A; GRINSTEIN S; GROSSO PILCHER C; GROUP RC; GRUNDLER U; DA COSTA JG; GUNAY UNALAN Z; HABER C; HAHN K; HAHN SR; HALKIADAKIS E; HAN BY; HAN JY; HANDLER R; HAPPACHER F; HARA K; HARE D; HARE M; HARPER S; HARR RF; HARRIS RM; HARTZ M; HATAKEYAMA K; HAUSER J; HAYS C; HECK M; HEIJBOER A; HEINEMANN B; HEINRICH J; HENDERSON C; HERNDON M; HEUSER J; HEWAMANAGE S; HIDAS D; HILL CS; HIRSCHBUEHL D; HOCKER A; HOU S; HOULDEN M; HSU SC; HUFFMAN BT; HUGHES RE; HUSEMANN U; HUSTON J; INCANDELA J; INTROZZI G; IORI, Maurizio ;IVANOV A; JAMES E; JAYATILAKA B; JEON EJ; JHA MK; JINDARIANI S; JOHNSON W; JONES M; JOO KK; JUN SY; JUNG JE; JUNK TR; KAMON T; KAR D; KARCHIN PE; KATO Y; KEPHART R; KEUNG J; KHOTILOVICH V; KILMINSTER B; KIM DH; KIM HS; KIM JE; KIM MJ; KIM SB; KIM SH; KIM YK; KIMURA N; KIRSCH L; KLIMENKO S; KNUTESON B; KO BR; KOAY SA; KONDO K; KONG DJ; KONIGSBERG J; KORYTOV A; 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MOVILLA FERNANDEZ P; MULMENSTADT J; MUKHERJEE A; MULLER T; MUMFORD R; MURAT P; MUSSINI M; NACHTMAN J; NAGAI Y; NAGANO A; NAGANOMA J; NAKAMURA K; NAKANO I; NAPIER A; NECULA V; NEU C; NEUBAUER MS; NIELSEN J; NODULMAN L; NORMAN M; NORNIELLA O; NURSE E; OAKES L; OH SH; OH YD; OKSUZIAN I; OKUSAWA T; ORAVA R; OSTERBERG K; GRISO SP; PAGLIARONE C; PALENCIA E; PAPADIMITRIOU V; PAPAIKONOMOU A; PARAMONOV AA; PARKS B; PASHAPOUR S; PATRICK J; PAULETTA G; PAULINI M; PAUS C; PELLETT DE; PENZO A; PHILLIPS TJ; PIACENTINO G; PIANORI E; PINERA L; PITTS K; PLAGER C; PONDROM L; POUKHOV O; POUNDER N; PRAKOSHYN F; PRONKO A; PROUDFOOT J; PTOHOS F; PUESCHEL E; PUNZI G; PURSLEY J; RADEMACKER J; RAHAMAN A; RAMAKRISHNAN V; RANJAN N; REDONDO I; REISERT B; REKOVIC V; RENTON P; RESCIGNO M; RICHTER S; RIMONDI F; RISTORI L; ROBSON A; RODRIGO T; RODRIGUEZ T; ROGERS E; ROLLI S; ROSER R; ROSSI M; ROSSIN R; ROY P; RUIZ A; RUSS J; RUSU V; SAARIKKO H; SAFONOV A; SAKUMOTO WK; SALTO O; SANTI L; SARKAR S; SARTORI L; SATO K; SAVOY NAVARRO A; 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VILAR R; VINE T; VOGEL M; VOLOBOUEV I; VOLPI G; WURTHWEIN F; WAGNER P; WAGNER RG; WAGNER RL; WAGNER KUHR J; WAGNER W; WAKISAKA T; WALLNY R; WANG SM; WARBURTON A; WATERS D; WEINBERGER M; 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; XIE S; YAGIL A; YAMAMOTO K; YAMAOKA J; YANG UK; YANG YC; YAO WM; YEH GP; YOH J; YORITA K; YOSHIDA T; YU GB; YU I; YU SS; YUN JC; ZANELLO L; ZANETTI A; ZAW I; ZHANG X; ZHENG Y; ZUCCHELLI S.
2009
Abstract
We present a measurement of the ratio of the t (t) over bar production cross section via gluon-gluon fusion to the total t (t) over bar production cross section in p (p) over bar collisions at root s = 1.96 Tev at the Tevatron. Using a data sample with an integrated luminosity of 955 pb(-1) recorded by the CDF II detector at Fermilab, we select events based on the t (t) over bar decay to lepton + jets. Using an artificial neural network technique we discriminate between t (t) over bar events produced via q (q) over bar annihilation and gg fusion, and find G(f) = sigma(gg -> t (t) over bar/sigma(p (p) over bar -> t (t) over bar) < 0.33 at the 68% confidence level. This result is combined with a previous measurement to obtain the most stringent measurement of this quantity by CDF to date, G(f) = 0.07(-0.07)(+0.15).
Citazione
Measurement of the fraction of t(t)over-bar production via gluon-gluon fusion in p(p)over-bar collisions at root s=1.96 Tev / Aaltonen, T; Adelman, J; Akimoto, T; Albrow, Mg; Gonzalez, Ba; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Apresyan, A; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, A; Aurisano, A; Azfar, F; Azzurri, P; Badgett, W; BARBARO GALTIERI, A; Barnes, Ve; Barnett, Ba; Bartsch, V; Bauer, G; Beauchemin, Ph; Bedeschi, F; Bednar, P; Beecher, D; Behari, S; Bellettini, G; Bellinger, J; Benjamin, D; Beretvas, A; Beringer, J; Bhatti, A; Binkley, M; Bisello, D; Bizjak, I; Blair, Re; Blocker, C; Blumenfeld, B; Bocci, A; Bodek, A; Boisvert, V; Bolla, G; Bortoletto, D; Boudreau, J; Boveia, A; Brau, B; Bridgeman, A; Brigliadori, L; Bromberg, C; Brubaker, E; Budagov, J; Budd, Hs; Budd, S; Burkett, K; Busetto, G; Bussey, P; Buzatu, A; Byrum, Kl; Cabrera, S; Calancha, C; Campanelli, M; Campbell, M; Canelli, F; Canepa, A; Carlsmith, D; Carosi, R; Carrillo, S; 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[10.1103/physrevd.79.031101]
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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.