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1. First measurement of the left-right cross section asymmetry in Z boson production by e+e- collisions

Author

ABE K, ABT I, ACTON PD, ADOLPHSEN CE, AGNEW G, ALBER C, ALZOFON DF, ANTILOGUS P, ARROYO C, ASH WW, ASHFORD V, ASTBURY A, ASTON D, AU Y, AXEN DA, BACCHETTA N, BAIRD KG, BAKER W, BALTAY C, BAND HR, BARANKO G, BARDON O, BARRERA F, BATTISTON R, BAZARKO AO, BEAN A, BEER G, BELCINSKI RJ, BELL RA, BENDAVID R, BENVENUTI AC, BERGER R, BERRIDGE SC, BETHKE S, BIASINI M, BIENZ T, BILEI GM, BIRD F, BISELLO D, BLAYLOCK G, BLUMBERG R, BOGART JR, BOLTON T, BOUGEROLLE S, BOWER GR, BOYCE RF, BRAU JE, BREIDENBACH M, BROWDER TE, BUGG WM, BURGESS B, BURKE D, BURNETT TH, BURROWS PN, BUSZA W, BYERS BL, CALCATERRA A, CALDWELL DO, CALLOWAY D, CAMANZI B, CAMILLERI L, CARPINELLI, Massimo, CARR J, CARTWRIGHT S, CASSELL R, CASTALDI R, CASTRO A, CAVALLISFORZA M, CHADWICK GB, CHAMBERLAIN O, CHAMBERS D, CHEN L, CLARKE PEL, CLAUS R, CLENDENIN J, COHN HO, COLLER JA, COOK V, CORDS D, COTTON R, COWAN RF, COYLE PA, COYNE DG, CRADDOCK W, CUTLER H, DOLIVEIRA A, DAMERELL CJS, DASU S, DAVIS R, DESANGRO R, DESIMONE P, DESIMONE S, DEAN T, DECKER FJ, DEJONGH F, DELLORSO R, DISCO A, DOLIN R, DOWNING RW, DU YC, DUBOIS R, DUBOSCQ JE, DUNWOODIE W, DURRETT DD, ECKLUND SD, EIGEN G, EISENSTEIN BI, ELIA R, EMMA PJ, EMMET WT, ENGLISH RL, ERDOS E, ESCALERA J, FAN C, FERO MJ, FERRIE J, FIEGUTH T, FLYNN J, FORBUSH DA, FORTUNE KM, FOX JD, FOX MJ, FREY R, FREYTAG DR, FRIEDMAN JI, FRISCH J, FUJIMOTO J, FURUNO K, GAILLARD M, GALLINARO M, GARWIN E, GILLMAN T, GIOUMOUSIS A, GLADDING G, GONZALEZ S, GURD DP, HALE DL, HALLER GM, HALLEWELL GD, HAMILTON V, HANEY MJ, HANSLKOZANECKA T, HARGIS H, HARRISON J, HART EL, HASEGAWA K, HASEGAWA Y, HEDGES S, HERTZBACH SS, HILDRETH MD, HILOMEN RC, HIMEL TM, HITLIN DG, HODGES TA, HODGSON J, HOEFLICH JJ, HONMA A, HORELICK D, HUBER J, HUFFER ME, HUGHES EW, HWANG H, HYATT E, IWASAKI Y, IZEN JM, JOBE RK, JACQUES P, JAKO C, JOHNSON AS, JOHNSON JR, JOHNSON RA, JONES S, JUNK T, KAISER S, KAJIKAWA R, KALELKAR M, KANG H, KARLINER I, KAWAHARA H, KEELER RK, KELSEY MH, KENDALL HW, KHARAKH D, KIM HY, KIM PC, KING R, KLEIN M, KOFLER RR, KOWITT M, KREJCIK P, KRISHNA NM, KROEGER RS, KULIKOV AV, KUNZ PF, KWON Y, LABS JF, LANGSTAFF RR, LANGSTON M, LARSEN R, LATH A, LAUBER JA, LEITH DWG, LIMBERG T, LINTERN L, LIU X, LORETI M, LU A, LYNCH HL, LYONS T, MA J, MAJID WA, MANCINELLI G, MANLY S, MANSOUR D, MANTOVANI G, MARKIEWICZ TW, MARUYAMA T, MASON GR, MASUDA H, MATHYS L, MAZAHERI G, MAZZUCATO A, MAZZUCATO E, MCCORMICK DJ, MCGOWAN JF, MCHUGH S, MCKEMEY AK, MEADOWS BT, MELLOR DJ, MESSNER R, MINCER AI, MINTY M, MOCKETT PM, MOFFEIT KC, MORRISON RJ, MOURS B, MUELLER G, MULLER D, MUNDY G, NAGAMINE T, NAUENBERG U, NEAL H, NELSON D, NESTEROV V, NORDBY M, NUSSBAUM M, NUTTALL A, OGREN H, OLSEN J, ORAM C, OSBORNE LS, OSSA R, OXOBY G, PAFFRATH L, PALOUNEK A, PANVINI RS, PARK H, PAULUZZI M, PAVEL TJ, PERRIER F, PERUZZI I, PESCARA L, PETERS D, PETERSEN H, PETRADZA M, PHINNEY N, PICCOLO M, PIEMONTESE L, PIERONI E, PITTHAN R, PITTS KT, PLANO RJ, POFFENBERGER PR, PREPOST R, PRESCOTT CY, PRIPSTEIN D, PUNKAR GD, PUTALLAZ G, RAIMONDI P, RANKIN P, RATCLIFF BN, REEVES TW, RENSING PE, RICHMAN JD, RINTA R, ROBERTSON LP, ROCHESTER LS, ROSENSON L, ROSS MC, ROTHBERG JE, ROTHENBERG A, ROWSON PC, RUSSELL JJ, RUST D, RUTZ E, SAEZ P, SANTHA AK, SANTOCCHIA A, SAXTON OH, SCHALK T, SCHENK PR, SCHINDLER RH, SCHNEEKLOTH U, SCHNEIDER M, SCHULTZ D, SCHULTZ GE, SCHUMM BA, SEEMAN JT, SEIDEN A, SERVOLI L, SETTLES M, SHAEVITZ MH, SHANK JT, SHAPIRO G, SHAPIRO SL, SHAW H, SHEPPARD JC, SHERDEN DJ, SHIMOMURA T, SHOUP A, SHYPIT RL, SIEMANN RH, SIMOPOULOS C, SKARPAAS K, SMITH SR, SNYDER A, SNYDER JA, SOBIE R, SOKOLOFF MD, SPENCE WL, SPENCER EN, STLORANT S, STAMER P, STEINER H, STEINER R, STEPHENSON RJ, STEWART G, STILES P, STOCKDALE IE, STRAUSS MG, SU D, SUEKANE F, SUGIYAMA A, SUZUKI S, SWARTZ M, SZUMILO A, TAHAR MZ, TAKAHASHI T, TANG H, TAPPERN GJ, TARNOPOLSKY G, TAYLOR FE, TECCHIO M, THALER JJ, TOEVS F, TOGE N, TURCOTTE M, TURK JD, TURNER JL, USHER T, VAVRA J, VANNINI C, VELLA E, VENUTI JP, VERDIER R, VERDINI PG, WADSWORTH BF, WAITE AP, WALKER NJ, WALZ D, WARNER D, WATT R, WATTS SJ, WEBER T, WEIDEMANN AW, WHITAKER JS, WHITE SL, WICKENS FJ, WICKERT SA, WILLIAMS DA, WILLIAMS DC, WILLIAMS RW, WILLIAMS SH, WILSON RJ, WISNIEWSKI WJ, WITHERELL MS, WOODLY MD, WOODS M, WORD GB, WYSS J, YAMAMOTO RK, YAMARTINO JM, YEE C, YEREMIAN AD, YELLIN SJ, YIM A, YOUNG CC, YOUNG KK, YUTA H, ZAPALAC G, ZDARKO RW, ZEITLIN C, ZHOU J, ZIEMANN V, ZOLOTOREV M, ZUCCHELLI P., Abe, K, Abt, I, Acton, P, Adolphsen, C, Agnew, G, Alber, C, Alzofon, D, Antilogus, P, Arroyo, C, Ash, W, Ashford, V, Astbury, A, Aston, D, Au, Y, Axen, D, Bacchetta, N, Baird, K, Baker, W, Baltay, C, Band, H, Baranko, G, Bardon, O, Barrera, F, Battiston, R, Bazarko, A, Bean, A, Beer, G, Belcinski, R, Bell, R, Bendavid, R, Benvenuti, A, Berger, R, Berridge, S, Bethke, S, Biasini, M, Bienz, T, Bilei, G, Bird, F, Bisello, D, Blaylock, G, Blumberg, R, Bogart, J, Bolton, T, Bougerolle, S, Bower, G, Boyce, R, Brau, J, Breidenbach, M, Browder, T, Bugg, W, Burgess, B, Burke, D, Burnett, T, Burrows, P, Busza, W, Byers, B, Calcaterra, A, Caldwell, D, Calloway, D, Camanzi, B, Camilleri, L, Carpinelli, M, Carr, J, Cartwright, S, Cassell, R, Castaldi, R, Castro, A, Cavallisforza, M, Chadwick, G, Chamberlain, O, Chambers, D, Chen, L, Clarke, P, Claus, R, Clendenin, J, Cohn, H, Coller, J, Cook, V, Cords, D, Cotton, R, Cowan, R, Coyle, P, Coyne, D, Craddock, W, Cutler, H, Doliveira, A, Damerell, C, Dasu, S, Davis, R, Desangro, R, Desimone, P, Desimone, S, Dean, T, Decker, F, Dejongh, F, Dellorso, R, Disco, A, Dolin, R, Downing, R, Du, Y, Dubois, R, Duboscq, J, Dunwoodie, W, Durrett, D, Ecklund, S, Eigen, G, Eisenstein, B, Elia, R, Emma, P, Emmet, W, English, R, Erdos, E, Escalera, J, Fan, C, Fero, M, Ferrie, J, Fieguth, T, Flynn, J, Forbush, D, Fortune, K, Fox, J, Fox, M, Frey, R, Freytag, D, Friedman, J, Frisch, J, Fujimoto, J, Furuno, K, Gaillard, M, Gallinaro, M, Garwin, E, Gillman, T, Gioumousis, A, Gladding, G, Gonzalez, S, Gurd, D, Hale, D, Haller, G, Hallewell, G, Hamilton, V, Haney, M, Hanslkozanecka, T, Hargis, H, Harrison, J, Hart, E, Hasegawa, K, Hasegawa, Y, Hedges, S, Hertzbach, S, Hildreth, M, Hilomen, R, Himel, T, Hitlin, D, Hodges, T, Hodgson, J, Hoeflich, J, Honma, A, Horelick, D, Huber, J, Huffer, M, Hughes, E, Hwang, H, Hyatt, E, Iwasaki, Y, Izen, J, Jobe, R, Jacques, P, Jako, C, Johnson, A, Johnson, J, Johnson, R, Jones, S, Junk, T, Kaiser, S, Kajikawa, R, Kalelkar, M, Kang, H, Karliner, I, Kawahara, H, Keeler, R, Kelsey, M, Kendall, H, Kharakh, D, Kim, H, Kim, P, King, R, Klein, M, Kofler, R, Kowitt, M, Krejcik, P, Krishna, N, Kroeger, R, Kulikov, A, Kunz, P, Kwon, Y, Labs, J, Langstaff, R, Langston, M, Larsen, R, Lath, A, Lauber, J, Leith, D, Limberg, T, Lintern, L, Liu, X, Loreti, M, Lu, A, Lynch, H, Lyons, T, Ma, J, Majid, W, Mancinelli, G, Manly, S, Mansour, D, Mantovani, G, Markiewicz, T, Maruyama, T, Mason, G, Masuda, H, Mathys, L, Mazaheri, G, Mazzucato, A, Mazzucato, E, Mccormick, D, Mcgowan, J, Mchugh, S, Mckemey, A, Meadows, B, Mellor, D, Messner, R, Mincer, A, Minty, M, Mockett, P, Moffeit, K, Morrison, R, Mours, B, Mueller, G, Muller, D, Mundy, G, Nagamine, T, Nauenberg, U, Neal, H, Nelson, D, Nesterov, V, Nordby, M, Nussbaum, M, Nuttall, A, Ogren, H, Olsen, J, Oram, C, Osborne, L, Ossa, R, Oxoby, G, Paffrath, L, Palounek, A, Panvini, R, Park, H, Pauluzzi, M, Pavel, T, Perrier, F, Peruzzi, I, Pescara, L, Peters, D, Petersen, H, Petradza, M, Phinney, N, Piccolo, M, Piemontese, L, Pieroni, E, Pitthan, R, Pitts, K, Plano, R, Poffenberger, P, Prepost, R, Prescott, C, Pripstein, D, Punkar, G, Putallaz, G, Raimondi, P, Rankin, P, Ratcliff, B, Reeves, T, Rensing, P, Richman, J, Rinta, R, Robertson, L, Rochester, L, Rosenson, L, Ross, M, Rothberg, J, Rothenberg, A, Rowson, P, Russell, J, Rust, D, Rutz, E, Saez, P, Santha, A, Santocchia, A, Saxton, O, Schalk, T, Schenk, P, Schindler, R, Schneekloth, U, Schneider, M, Schultz, D, Schultz, G, Schumm, B, Seeman, J, Seiden, A, Servoli, L, Settles, M, Shaevitz, M, Shank, J, Shapiro, G, Shapiro, S, Shaw, H, Sheppard, J, Sherden, D, Shimomura, T, Shoup, A, Shypit, R, Siemann, R, Simopoulos, C, Skarpaas, K, Smith, S, Snyder, A, Snyder, J, Sobie, R, Sokoloff, M, Spence, W, Spencer, E, Stlorant, S, Stamer, P, Steiner, H, Steiner, R, Stephenson, R, Stewart, G, Stiles, P, Stockdale, I, Strauss, M, Su, D, Suekane, F, Sugiyama, A, Suzuki, S, Swartz, M, Szumilo, A, Tahar, M, Takahashi, T, Tang, H, Tappern, G, Tarnopolsky, G, Taylor, F, Tecchio, M, Thaler, J, Toevs, F, Toge, N, Turcotte, M, Turk, J, Turner, J, Usher, T, Vavra, J, Vannini, C, Vella, E, Venuti, J, Verdier, R, Verdini, P, Wadsworth, B, Waite, A, Walker, N, Walz, D, Warner, D, Watt, R, Watts, S, Weber, T, Weidemann, A, Whitaker, J, White, S, Wickens, F, Wickert, S, Williams, D, Williams, R, Williams, S, Wilson, R, Wisniewski, W, Witherell, M, Woodly, M, Woods, M, Word, G, Wyss, J, Yamamoto, R, Yamartino, J, Yee, C, Yeremian, A, Yellin, S, Yim, A, Young, C, Young, K, Yuta, H, Zapalac, G, Zdarko, R, Zeitlin, C, Zhou, J, Ziemann, V, Zolotorev, M, and Zucchelli, P

Subjects
POLARIZATION, DECAYS
Abstract

We present the first measurement of the left-right cross section asymmetry (ALR) for Z boson production by e+e- collisions. The measurement was performed at a center-of-mass energy of 91.55 GeV with the SLD detector at the SLAC Linear Collider which utilized a longitudinally polarized electron beam. The average beam polarization was (22.4±0.6)%. Using a sample of 10 224 Z decays, we measure ALR to be 0.100±0.044(stat)±0.004(syst), which determines the effective weak mixing angle to be sin2θWeff=0.2378 ±0.0056(stat)±0.0005(syst).

Published
1993

2. FIRST MEASUREMENT OF THE LEFT-RIGHT ASYMMETRY IN Z-BOSON PRODUCTION

Author

Abe, K, Abt, I, Acton, P, Adolphsen, C, Agnew, G, Alber, C, Alzofon, D, Antilogus, P, Arroyo, C, Ash, W, Ashford, V, Astbury, A, Aston, D, Au, Y, Axen, D, Bacchetta, N, Baird, K, Baker, W, Baltay, C, Band, H, Baranko, G, Bardon, O, Barrera, F, Battiston, R, Bazarko, A, Bean, A, Beer, G, Belcinski, R, Bell, R, Bendavid, R, Benvenuti, A, Berger, R, Berridge, S, Bethke, S, Biasini, M, Bienz, T, Bilei, G, Bird, F, Bisello, D, Blaylock, G, Blumberg, R, Bogart, J, Bolton, T, Bougerolle, S, Bower, G, Boyce, R, Brau, J, Breidenbach, M, Browder, T, Bugg, W, Burgess, B, Burke, D, Burnett, T, Burrows, P, Busza, W, Byers, B, Calcaterra, A, Caldwell, D, Calloway, D, Camanzi, B, Camilleri, I, Carpinelli, M, Carr, J, Cartwright, S, Cassell, R, Castaldi, R, Castro, A, Cavallisforza, M, Chadwick, G, Chamberlain, O, Chambers, D, Chen, L, Clarke, P, Claus, R, Clendenin, J, Cohn, H, Coller, J, Cook, V, Cords, D, Cotton, R, Cowan, R, Coyle, P, Coyne, D, Craddock, W, Cutler, H, Doliveira, A, Damerell, C, Dasu, S, Davis, R, Desangro, R, Desimone, P, Desimone, S, Dean, T, Decker, R, Dejongh, F, Dellorso, R, Disco, A, Dolin, R, Downing, R, Du, Y, Dubois, R, Duboscq, J, Dunwoodie, W, Durrett, D, Ecklund, S, Eigen, G, Eisenstein, B, Elia, R, Emma, P, Emmet, W, English, R, Erdos, E, Escalera, J, Fan, C, Fero, M, Ferrie, J, Fieguth, T, Flynn, J, Forbush, D, Fortune, K, Fox, J, Fox, M, Frey, R, Freytag, D, Friedman, J, Frisch, J, Fujimoto, J, Furuno, K, Gaillard, M, Gallinaro, M, Garwin, E, Gillman, T, Gioumousis, A, Gladding, G, Gonzalez, S, Gurd, D, Hale, D, Haller, G, Hallewell, G, Hamilton, V, Haney, M, Hanslkozanecka, T, Hargis, H, Harrison, J, Hart, E, Hasegawa, K, Hasegawa, Y, Hedges, S, Hertzbach, S, Hildreth, M, Hilomen, R, Himel, T, Hitlin, D, Hodges, T, Hodgson, J, Hoeflich, J, Honma, A, Horelick, D, Huber, J, Huffer, M, Hughes, E, Hwang, H, Hyatt, E, Iwasaki, Y, Izen, J, Jobe, R, Jacques, P, Jako, C, Johnson, A, Johnson, J, Johnson, R, Jones, S, Junk, T, Kaiser, S, Kajikawa, R, Kalelkar, M, Kang, H, Karliner, I, Kawahara, H, Keeler, R, Kelsey, M, Kendall, H, Kharakh, D, Kim, H, Kim, P, King, R, Klein, M, Kofler, R, Kowitt, M, Krejcik, P, Krishna, N, Kroeger, R, Kulikov, A, Kunz, P, Kwon, Y, Labs, J, Langstaff, R, Langston, M, Larsen, R, Lath, A, Lauber, J, Leith, D, Limberg, T, Lintern, L, Liu, X, Loreti, M, Lu, A, Lynch, H, Lyons, T, Ma, J, Majid, W, Mancinelli, G, Manly, S, Mansour, D, Mantovani, G, Markiewicz, T, Maruyama, T, Mason, G, Masuda, H, Mathys, L, Mazaheri, G, Mazzucato, A, Mazzucato, E, Mccormick, D, Mcgowan, J, Mchugh, S, Mckemey, A, Meadows, B, Mellor, D, Messner, R, Mincer, A, Minty, M, Mockett, P, Moffeit, K, Morrison, R, Mours, B, Mueller, G, Muller, D, Mundy, G, Nagamine, T, Nauenberg, U, Neal, H, Nelson, D, Nesterov, V, Nordby, M, Nussbaum, M, Nuttall, A, Ogren, H, Olsen, J, Oram, C, Osborne, L, Ossa, R, Oxoby, G, Paffrath, L, Palounek, A, Panvini, R, Park, H, Pauluzzi, M, Pavel, T, Perrier, F, Peruzzi, I, Pescara, L, Peters, D, Petersen, H, Petradza, M, Phinney, N, Piccolo, M, Piemontese, L, Pieroni, E, Pitthan, R, Pitts, K, Plano, R, Poffenberger, P, Prepost, R, Prescott, C, Pripstein, D, Punkar, G, Putallaz, G, Raimondi, P, Rankin, P, Ratcliff, B, Reeves, T, Rensing, P, Richman, J, Rinta, R, Robertson, L, Rochester, L, Rosenson, L, Ross, M, Rothberg, J, Rothenberg, A, Rowson, P, Russell, J, Rust, D, Rutz, E, Saez, P, Santha, A, Santocchia, A, Saxton, O, Schalk, T, Schenk, P, Schindler, R, Schneekloth, U, Schneider, M, Schultz, D, Schultz, G, Schumm, B, Seeman, J, Seiden, A, Servoli, L, Settles, M, Shaevitz, M, Shank, J, Shapiro, G, Shapiro, S, Shaw, H, Sheppard, J, Sherden, D, Shimomura, T, Shoup, A, Shypit, R, Siemann, R, Simopoulos, C, Skarpaas, K, Smith, S, Snyder, A, Snyder, J, Sobie, R, Sokoloff, M, Spence, W, Spencer, E, Stlorant, S, Stamer, P, Steiner, H, Steiner, R, Stephenson, R, Stewart, G, Stiles, P, Stockdale, I, Strauss, M, Su, D, Suekane, F, Sugiyama, A, Suzuki, S, Swartz, M, Szumilo, A, Tahar, M, Takahashi, T, Tang, H, Tappern, G, Tarnopolsky, G, Taylor, F, Tecchio, M, Thaler, J, Toevs, F, Toge, N, Turcotte, M, Turk, J, Turner, J, Usher, T, Vavra, J, Vannini, C, Vella, E, Venuti, J, Verdier, R, Verdini, P, Wadsworth, B, Waite, A, Walker, N, Walz, D, Warner, D, Watt, R, Watts, S, Weber, T, Weidemann, A, Whitaker, J, White, S, Wickens, F, Wickert, S, Williams, D, Williams, R, Williams, S, Wilson, R, Wisniewski, W, Witherell, M, Woodly, M, Woods, M, Word, G, Wyss, J, Yamamoto, R, Yamartino, J, Yee, C, Yeremian, A, Yellin, S, Yim, A, Young, C, Young, K, Yuta, H, Zapalac, G, Zdarko, R, Zeitlin, C, Zhou, J, Ziemann, V, Zolotorev, M, Zucchelli, P, ABE K, ABT I, ACTON PD, ADOLPHSEN CE, AGNEW G, ALBER C, ALZOFON DF, ANTILOGUS P, ARROYO C, ASH WW, ASHFORD V, ASTBURY A, ASTON D, AU Y, AXEN DA, BACCHETTA N, BAIRD KG, BAKER W, BALTAY C, BAND HR, BARANKO G, BARDON O, BARRERA F, BATTISTON R, BAZARKO AO, BEAN A, BEER G, BELCINSKI RJ, BELL RA, BENDAVID R, BENVENUTI AC, BERGER R, BERRIDGE SC, BETHKE S, BIASINI M, BIENZ T, BILEI GM, BIRD F, BISELLO D, BLAYLOCK G, BLUMBERG R, BOGART JR, BOLTON T, BOUGEROLLE S, BOWER GR, BOYCE RF, BRAU JE, BREIDENBACH M, BROWDER TE, BUGG WM, BURGESS B, BURKE D, BURNETT TH, BURROWS PN, BUSZA W, BYERS BL, CALCATERRA A, CALDWELL DO, CALLOWAY D, CAMANZI B, CAMILLERI I, CARPINELLI, Massimo, CARR J, CARTWRIGHT S, CASSELL R, CASTALDI R, CASTRO A, CAVALLISFORZA M, CHADWICK GB, CHAMBERLAIN O, CHAMBERS D, CHEN L, CLARKE PEL, CLAUS R, CLENDENIN J, COHN HO, COLLER JA, COOK V, CORDS D, COTTON R, COWAN RF, COYLE PA, COYNE DG, CRADDOCK W, CUTLER H, DOLIVEIRA A, DAMERELL CJS, DASU S, DAVIS R, DESANGRO R, DESIMONE P, DESIMONE S, DEAN T, DECKER RJ, DEJONGH F, DELLORSO R, DISCO A, DOLIN R, DOWNING RW, DU YC, DUBOIS R, DUBOSCQ JE, DUNWOODIE W, DURRETT DD, ECKLUND SD, EIGEN G, EISENSTEIN BI, ELIA R, EMMA PJ, EMMET WT, ENGLISH RL, ERDOS E, ESCALERA J, FAN C, FERO MJ, FERRIE J, FIEGUTH T, FLYNN J, FORBUSH DA, FORTUNE KM, FOX JD, FOX MJ, FREY R, FREYTAG DR, FRIEDMAN JI, FRISCH J, FUJIMOTO J, FURUNO K, GAILLARD M, GALLINARO M, GARWIN E, GILLMAN T, GIOUMOUSIS A, GLADDING G, GONZALEZ S, GURD DP, HALE DL, HALLER GM, HALLEWELL GD, HAMILTON V, HANEY MJ, HANSLKOZANECKA T, HARGIS H, HARRISON J, HART EL, HASEGAWA K, HASEGAWA Y, HEDGES S, HERTZBACH SS, HILDRETH MD, HILOMEN RC, HIMEL TM, HITLIN DG, HODGES TA, HODGSON J, HOEFLICH JJ, HONMA A, HORELICK D, HUBER J, HUFFER ME, HUGHES EW, HWANG H, HYATT E, IWASAKI Y, IZEN JM, JOBE RK, JACQUES P, JAKO C, JOHNSON AS, JOHNSON JR, JOHNSON RA, JONES S, JUNK T, KAISER S, KAJIKAWA R, KALELKAR M, KANG H, KARLINER I, KAWAHARA H, KEELER RK, KELSEY MH, KENDALL HW, KHARAKH D, KIM HY, KIM PC, KING R, KLEIN M, KOFLER RR, KOWITT M, KREJCIK P, KRISHNA NM, KROEGER RS, KULIKOV AV, KUNZ PF, KWON Y, LABS JF, LANGSTAFF RR, LANGSTON M, LARSEN R, LATH A, LAUBER JA, LEITH DWG, LIMBERG T, LINTERN L, LIU X, LORETI M, LU A, LYNCH HL, LYONS T, MA J, MAJID WA, MANCINELLI G, MANLY S, MANSOUR D, MANTOVANI G, MARKIEWICZ TW, MARUYAMA T, MASON GR, MASUDA H, MATHYS L, MAZAHERI G, MAZZUCATO A, MAZZUCATO E, MCCORMICK DJ, MCGOWAN JF, MCHUGH S, MCKEMEY AK, MEADOWS BT, MELLOR DJ, MESSNER R, MINCER AI, MINTY M, MOCKETT PM, MOFFEIT KC, MORRISON RJ, MOURS B, MUELLER G, MULLER D, MUNDY G, NAGAMINE T, NAUENBERG U, NEAL H, NELSON D, NESTEROV V, NORDBY M, NUSSBAUM M, NUTTALL A, OGREN H, OLSEN J, ORAM C, OSBORNE LS, OSSA R, OXOBY G, PAFFRATH L, PALOUNEK A, PANVINI RS, PARK H, PAULUZZI M, PAVEL TJ, PERRIER F, PERUZZI I, PESCARA L, PETERS D, PETERSEN H, PETRADZA M, PHINNEY N, PICCOLO M, PIEMONTESE L, PIERONI E, PITTHAN R, PITTS KT, PLANO RJ, POFFENBERGER PR, PREPOST R, PRESCOTT CY, PRIPSTEIN D, PUNKAR GD, PUTALLAZ G, RAIMONDI P, RANKIN P, RATCLIFF BN, REEVES TW, RENSING PE, RICHMAN JD, RINTA R, ROBERTSON LP, ROCHESTER LS, ROSENSON L, ROSS MC, ROTHBERG JE, ROTHENBERG A, ROWSON PC, RUSSELL JJ, RUST D, RUTZ E, SAEZ P, SANTHA AK, SANTOCCHIA A, SAXTON OH, SCHALK T, SCHENK PR, SCHINDLER RH, SCHNEEKLOTH U, SCHNEIDER M, SCHULTZ D, SCHULTZ GE, SCHUMM BA, SEEMAN JT, SEIDEN A, SERVOLI L, SETTLES M, SHAEVITZ MH, SHANK JT, SHAPIRO G, SHAPIRO SL, SHAW H, SHEPPARD JC, SHERDEN DJ, SHIMOMURA T, SHOUP A, SHYPIT RL, SIEMANN RH, SIMOPOULOS C, SKARPAAS K, SMITH SR, SNYDER A, SNYDER JA, SOBIE R, SOKOLOFF MD, SPENCE WL, SPENCER EN, STLORANT S, STAMER P, STEINER H, STEINER R, STEPHENSON RJ, STEWART G, STILES P, STOCKDALE IE, STRAUSS MG, SU D, SUEKANE F, SUGIYAMA A, SUZUKI S, SWARTZ M, SZUMILO A, TAHAR MZ, TAKAHASHI T, TANG H, TAPPERN GJ, TARNOPOLSKY G, TAYLOR FE, TECCHIO M, THALER JJ, TOEVS F, TOGE N, TURCOTTE M, TURK JD, TURNER JL, USHER T, VAVRA J, VANNINI C, VELLA E, VENUTI JP, VERDIER R, VERDINI PG, WADSWORTH BF, WAITE AP, WALKER NJ, WALZ D, WARNER D, WATT R, WATTS SJ, WEBER T, WEIDEMANN AW, WHITAKER JS, WHITE SL, WICKENS FJ, WICKERT SA, WILLIAMS DA, WILLIAMS DC, WILLIAMS RW, WILLIAMS SH, WILSON RJ, WISNIEWSKI WJ, WITHERELL MS, WOODLY MD, WOODS M, WORD GB, WYSS J, YAMAMOTO RK, YAMARTINO JM, YEE C, YEREMIAN AD, YELLIN SJ, YIM A, YOUNG CC, YOUNG KK, YUTA H, ZAPALAC G, ZDARKO RW, ZEITLIN C, ZHOU J, ZIEMANN V, ZOLOTOREV M, ZUCCHELLI P., Abe, K, Abt, I, Acton, P, Adolphsen, C, Agnew, G, Alber, C, Alzofon, D, Antilogus, P, Arroyo, C, Ash, W, Ashford, V, Astbury, A, Aston, D, Au, Y, Axen, D, Bacchetta, N, Baird, K, Baker, W, Baltay, C, Band, H, Baranko, G, Bardon, O, Barrera, F, Battiston, R, Bazarko, A, Bean, A, Beer, G, Belcinski, R, Bell, R, Bendavid, R, Benvenuti, A, Berger, R, Berridge, S, Bethke, S, Biasini, M, Bienz, T, Bilei, G, Bird, F, Bisello, D, Blaylock, G, Blumberg, R, Bogart, J, Bolton, T, Bougerolle, S, Bower, G, Boyce, R, Brau, J, Breidenbach, M, Browder, T, Bugg, W, Burgess, B, Burke, D, Burnett, T, Burrows, P, Busza, W, Byers, B, Calcaterra, A, Caldwell, D, Calloway, D, Camanzi, B, Camilleri, I, Carpinelli, M, Carr, J, Cartwright, S, Cassell, R, Castaldi, R, Castro, A, Cavallisforza, M, Chadwick, G, Chamberlain, O, Chambers, D, Chen, L, Clarke, P, Claus, R, Clendenin, J, Cohn, H, Coller, J, Cook, V, 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Jacques, P, Jako, C, Johnson, A, Johnson, J, Johnson, R, Jones, S, Junk, T, Kaiser, S, Kajikawa, R, Kalelkar, M, Kang, H, Karliner, I, Kawahara, H, Keeler, R, Kelsey, M, Kendall, H, Kharakh, D, Kim, H, Kim, P, King, R, Klein, M, Kofler, R, Kowitt, M, Krejcik, P, Krishna, N, Kroeger, R, Kulikov, A, Kunz, P, Kwon, Y, Labs, J, Langstaff, R, Langston, M, Larsen, R, Lath, A, Lauber, J, Leith, D, Limberg, T, Lintern, L, Liu, X, Loreti, M, Lu, A, Lynch, H, Lyons, T, Ma, J, Majid, W, Mancinelli, G, Manly, S, Mansour, D, Mantovani, G, Markiewicz, T, Maruyama, T, Mason, G, Masuda, H, Mathys, L, Mazaheri, G, Mazzucato, A, Mazzucato, E, Mccormick, D, Mcgowan, J, Mchugh, S, Mckemey, A, Meadows, B, Mellor, D, Messner, R, Mincer, A, Minty, M, Mockett, P, Moffeit, K, Morrison, R, Mours, B, Mueller, G, Muller, D, Mundy, G, Nagamine, T, Nauenberg, U, Neal, H, Nelson, D, Nesterov, V, Nordby, M, Nussbaum, M, Nuttall, A, Ogren, H, Olsen, J, Oram, C, Osborne, L, Ossa, R, Oxoby, G, Paffrath, L, Palounek, A, Panvini, R, Park, H, Pauluzzi, M, Pavel, T, Perrier, F, Peruzzi, I, Pescara, L, Peters, D, Petersen, H, Petradza, M, Phinney, N, Piccolo, M, Piemontese, L, Pieroni, E, Pitthan, R, Pitts, K, Plano, R, Poffenberger, P, Prepost, R, Prescott, C, Pripstein, D, Punkar, G, Putallaz, G, Raimondi, P, Rankin, P, Ratcliff, B, Reeves, T, Rensing, P, Richman, J, Rinta, R, Robertson, L, Rochester, L, Rosenson, L, Ross, M, Rothberg, J, Rothenberg, A, Rowson, P, Russell, J, Rust, D, Rutz, E, Saez, P, Santha, A, Santocchia, A, Saxton, O, Schalk, T, Schenk, P, Schindler, R, Schneekloth, U, Schneider, M, Schultz, D, Schultz, G, Schumm, B, Seeman, J, Seiden, A, Servoli, L, Settles, M, Shaevitz, M, Shank, J, Shapiro, G, Shapiro, S, Shaw, H, Sheppard, J, Sherden, D, Shimomura, T, Shoup, A, Shypit, R, Siemann, R, Simopoulos, C, Skarpaas, K, Smith, S, Snyder, A, Snyder, J, Sobie, R, Sokoloff, M, Spence, W, Spencer, E, Stlorant, S, Stamer, P, Steiner, H, Steiner, R, Stephenson, R, Stewart, G, Stiles, P, Stockdale, I, Strauss, M, Su, D, Suekane, F, Sugiyama, A, Suzuki, S, Swartz, M, Szumilo, A, Tahar, M, Takahashi, T, Tang, H, Tappern, G, Tarnopolsky, G, Taylor, F, Tecchio, M, Thaler, J, Toevs, F, Toge, N, Turcotte, M, Turk, J, Turner, J, Usher, T, Vavra, J, Vannini, C, Vella, E, Venuti, J, Verdier, R, Verdini, P, Wadsworth, B, Waite, A, Walker, N, Walz, D, Warner, D, Watt, R, Watts, S, Weber, T, Weidemann, A, Whitaker, J, White, S, Wickens, F, Wickert, S, Williams, D, Williams, R, Williams, S, Wilson, R, Wisniewski, W, Witherell, M, Woodly, M, Woods, M, Word, G, Wyss, J, Yamamoto, R, Yamartino, J, Yee, C, Yeremian, A, Yellin, S, Yim, A, Young, C, Young, K, Yuta, H, Zapalac, G, Zdarko, R, Zeitlin, C, Zhou, J, Ziemann, V, Zolotorev, M, Zucchelli, P, ABE K, ABT I, ACTON PD, ADOLPHSEN CE, AGNEW G, ALBER C, ALZOFON DF, ANTILOGUS P, ARROYO C, ASH WW, ASHFORD V, ASTBURY A, ASTON D, AU Y, AXEN DA, BACCHETTA N, BAIRD KG, BAKER W, BALTAY C, BAND HR, BARANKO G, BARDON O, BARRERA F, BATTISTON R, BAZARKO AO, BEAN A, BEER G, BELCINSKI RJ, BELL RA, BENDAVID R, BENVENUTI AC, BERGER R, BERRIDGE SC, BETHKE S, BIASINI M, BIENZ T, BILEI GM, BIRD F, BISELLO D, BLAYLOCK G, BLUMBERG R, BOGART JR, BOLTON T, BOUGEROLLE S, BOWER GR, BOYCE RF, BRAU JE, BREIDENBACH M, BROWDER TE, BUGG WM, BURGESS B, BURKE D, BURNETT TH, BURROWS PN, BUSZA W, BYERS BL, CALCATERRA A, CALDWELL DO, CALLOWAY D, CAMANZI B, CAMILLERI I, CARPINELLI, Massimo, CARR J, CARTWRIGHT S, CASSELL R, CASTALDI R, CASTRO A, CAVALLISFORZA M, CHADWICK GB, CHAMBERLAIN O, CHAMBERS D, CHEN L, CLARKE PEL, CLAUS R, CLENDENIN J, COHN HO, COLLER JA, COOK V, CORDS D, COTTON R, COWAN RF, COYLE PA, COYNE DG, CRADDOCK W, CUTLER H, DOLIVEIRA A, DAMERELL CJS, DASU S, DAVIS R, DESANGRO R, DESIMONE P, DESIMONE S, DEAN T, DECKER RJ, DEJONGH F, DELLORSO R, DISCO A, DOLIN R, DOWNING RW, DU YC, DUBOIS R, DUBOSCQ JE, DUNWOODIE W, DURRETT DD, ECKLUND SD, EIGEN G, EISENSTEIN BI, ELIA R, EMMA PJ, EMMET WT, ENGLISH RL, ERDOS E, ESCALERA J, FAN C, FERO MJ, FERRIE J, FIEGUTH T, FLYNN J, FORBUSH DA, FORTUNE KM, FOX JD, FOX MJ, FREY R, FREYTAG DR, FRIEDMAN JI, FRISCH J, FUJIMOTO J, FURUNO K, GAILLARD M, GALLINARO M, GARWIN E, GILLMAN T, GIOUMOUSIS A, GLADDING G, GONZALEZ S, GURD DP, HALE DL, HALLER GM, HALLEWELL GD, HAMILTON V, HANEY MJ, HANSLKOZANECKA T, HARGIS H, HARRISON J, HART EL, HASEGAWA K, HASEGAWA Y, HEDGES S, HERTZBACH SS, HILDRETH MD, HILOMEN RC, HIMEL TM, HITLIN DG, HODGES TA, HODGSON J, HOEFLICH JJ, HONMA A, HORELICK D, HUBER J, HUFFER ME, HUGHES EW, HWANG H, HYATT E, IWASAKI Y, IZEN JM, JOBE RK, JACQUES P, JAKO C, JOHNSON AS, JOHNSON JR, JOHNSON RA, JONES S, JUNK T, KAISER S, KAJIKAWA R, KALELKAR M, KANG H, KARLINER I, KAWAHARA H, KEELER RK, KELSEY MH, KENDALL HW, KHARAKH D, KIM HY, KIM PC, KING R, KLEIN M, KOFLER RR, KOWITT M, KREJCIK P, KRISHNA NM, KROEGER RS, KULIKOV AV, KUNZ PF, KWON Y, LABS JF, LANGSTAFF RR, LANGSTON M, LARSEN R, LATH A, LAUBER JA, LEITH DWG, LIMBERG T, LINTERN L, LIU X, LORETI M, LU A, LYNCH HL, LYONS T, MA J, MAJID WA, MANCINELLI G, MANLY S, MANSOUR D, MANTOVANI G, MARKIEWICZ TW, MARUYAMA T, MASON GR, MASUDA H, MATHYS L, MAZAHERI G, MAZZUCATO A, MAZZUCATO E, MCCORMICK DJ, MCGOWAN JF, MCHUGH S, MCKEMEY AK, MEADOWS BT, MELLOR DJ, MESSNER R, MINCER AI, MINTY M, MOCKETT PM, MOFFEIT KC, MORRISON RJ, MOURS B, MUELLER G, MULLER D, MUNDY G, NAGAMINE T, NAUENBERG U, NEAL H, NELSON D, NESTEROV V, NORDBY M, NUSSBAUM M, NUTTALL A, OGREN H, OLSEN J, ORAM C, OSBORNE LS, OSSA R, OXOBY G, PAFFRATH L, PALOUNEK A, PANVINI RS, PARK H, PAULUZZI M, PAVEL TJ, PERRIER F, PERUZZI I, PESCARA L, PETERS D, PETERSEN H, PETRADZA M, PHINNEY N, PICCOLO M, PIEMONTESE L, PIERONI E, PITTHAN R, PITTS KT, PLANO RJ, POFFENBERGER PR, PREPOST R, PRESCOTT CY, PRIPSTEIN D, PUNKAR GD, PUTALLAZ G, RAIMONDI P, RANKIN P, RATCLIFF BN, REEVES TW, RENSING PE, RICHMAN JD, RINTA R, ROBERTSON LP, ROCHESTER LS, ROSENSON L, ROSS MC, ROTHBERG JE, ROTHENBERG A, ROWSON PC, RUSSELL JJ, RUST D, RUTZ E, SAEZ P, SANTHA AK, SANTOCCHIA A, SAXTON OH, SCHALK T, SCHENK PR, SCHINDLER RH, SCHNEEKLOTH U, SCHNEIDER M, SCHULTZ D, SCHULTZ GE, SCHUMM BA, SEEMAN JT, SEIDEN A, SERVOLI L, SETTLES M, SHAEVITZ MH, SHANK JT, SHAPIRO G, SHAPIRO SL, SHAW H, SHEPPARD JC, SHERDEN DJ, SHIMOMURA T, SHOUP A, SHYPIT RL, SIEMANN RH, SIMOPOULOS C, SKARPAAS K, SMITH SR, SNYDER A, SNYDER JA, SOBIE R, SOKOLOFF MD, SPENCE WL, SPENCER EN, STLORANT S, STAMER P, STEINER H, STEINER R, STEPHENSON RJ, STEWART G, STILES P, STOCKDALE IE, STRAUSS MG, SU D, SUEKANE F, SUGIYAMA A, SUZUKI S, SWARTZ M, SZUMILO A, TAHAR MZ, TAKAHASHI T, TANG H, TAPPERN GJ, TARNOPOLSKY G, TAYLOR FE, TECCHIO M, THALER JJ, TOEVS F, TOGE N, TURCOTTE M, TURK JD, TURNER JL, USHER T, VAVRA J, VANNINI C, VELLA E, VENUTI JP, VERDIER R, VERDINI PG, WADSWORTH BF, WAITE AP, WALKER NJ, WALZ D, WARNER D, WATT R, WATTS SJ, WEBER T, WEIDEMANN AW, WHITAKER JS, WHITE SL, WICKENS FJ, WICKERT SA, WILLIAMS DA, WILLIAMS DC, WILLIAMS RW, WILLIAMS SH, WILSON RJ, WISNIEWSKI WJ, WITHERELL MS, WOODLY MD, WOODS M, WORD GB, WYSS J, YAMAMOTO RK, YAMARTINO JM, YEE C, YEREMIAN AD, YELLIN SJ, YIM A, YOUNG CC, YOUNG KK, YUTA H, ZAPALAC G, ZDARKO RW, ZEITLIN C, ZHOU J, ZIEMANN V, ZOLOTOREV M, and ZUCCHELLI P.

Abstract

We present the first measurement of the left-right cross-section asymmetry (A(LR)) in Z-boson production observed at the SLAC Linear Collider. In 1992 the SLD detector recorded 10 224 Z events produced by the collision of longitudinally polarized electrons with an unpolarized positron beam at a center-of-mass energy of 91.55 GeV. The average electron beam polarization during the run was (22.4 +/- 0.6)%. We measure A(LR) to be 0.100 +/- 0.044 (stat.) +/- 0.004 (syst.), which determines the effective weak mixing angle to be sin2 theta(W)eff = 0.2378 +/- 0.0056 (stat.) +/- 0.0005 (syst.).

Published
1993

3. Observational Needs for Improving Ocean and Coupled Reanalysis, S2S Prediction, and Decadal Prediction

Author

Stephen G. Penny, Santha Akella, Magdalena A. Balmaseda, Philip Browne, James A. Carton, Matthieu Chevallier, Francois Counillon, Catia Domingues, Sergey Frolov, Patrick Heimbach, Patrick Hogan, Ibrahim Hoteit, Doroteaciro Iovino, Patrick Laloyaux, Matthew J. Martin, Simona Masina, Andrew M. Moore, Patricia de Rosnay, Dinand Schepers, Bernadette M. Sloyan, Andrea Storto, Aneesh Subramanian, SungHyun Nam, Frederic Vitart, Chunxue Yang, Yosuke Fujii, Hao Zuo, Terry O’Kane, Paul Sandery, Thomas Moore, and Christopher C. Chapman

Subjects
data assimilation, reanalysis, coupled data assimilation, S2S prediction, decadal prediction, ocean observation network, Science, General. Including nature conservation, geographical distribution, QH1-199.5
Abstract

Developments in observing system technologies and ocean data assimilation (DA) are symbiotic. New observation types lead to new DA methods and new DA methods, such as coupled DA, can change the value of existing observations or indicate where new observations can have greater utility for monitoring and prediction. Practitioners of DA are encouraged to make better use of observations that are already available, for example, taking advantage of strongly coupled DA so that ocean observations can be used to improve atmospheric analyses and vice versa. Ocean reanalyses are useful for the analysis of climate as well as the initialization of operational long-range prediction models. There are many remaining challenges for ocean reanalyses due to biases and abrupt changes in the ocean-observing system throughout its history, the presence of biases and drifts in models, and the simplifying assumptions made in DA solution methods. From a governance point of view, more support is needed to bring the ocean-observing and DA communities together. For prediction applications, there is wide agreement that protocols are needed for rapid communication of ocean-observing data on numerical weather prediction (NWP) timescales. There is potential for new observation types to enhance the observing system by supporting prediction on multiple timescales, ranging from the typical timescale of NWP, covering hours to weeks, out to multiple decades. Better communication between DA and observation communities is encouraged in order to allow operational prediction centers the ability to provide guidance for the design of a sustained and adaptive observing network.

Published
2019
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4. Synthesis of Ocean Observations Using Data Assimilation for Operational, Real-Time and Reanalysis Systems: A More Complete Picture of the State of the Ocean

Author

Andrew M. Moore, Matthew J. Martin, Santha Akella, Hernan G. Arango, Magdalena Balmaseda, Laurent Bertino, Stefano Ciavatta, Bruce Cornuelle, Jim Cummings, Sergey Frolov, Pierre Lermusiaux, Paolo Oddo, Peter R. Oke, Andrea Storto, Anna Teruzzi, Arthur Vidard, and Anthony T. Weaver

Subjects
data assimilation, calculus of variations, Kálmán filters, ensembles, modeling, Science, General. Including nature conservation, geographical distribution, QH1-199.5
Abstract

Ocean data assimilation is increasingly recognized as crucial for the accuracy of real-time ocean prediction systems and historical re-analyses. The current status of ocean data assimilation in support of the operational demands of analysis, forecasting and reanalysis is reviewed, focusing on methods currently adopted in operational and real-time prediction systems. Significant challenges associated with the most commonly employed approaches are identified and discussed. Overarching issues faced by ocean data assimilation are also addressed, and important future directions in response to scientific advances, evolving and forthcoming ocean observing systems and the needs of stakeholders and downstream applications are discussed.

Published
2019
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5. Dalitz plot analysis of the decay D(+)-->K(-)pi(+)pi(+) and indication of a low-mass scalar Kpi resonance.

Author

Aitala EM, Amato S, Anjos JC, Appel JA, Ashery D, Banerjee S, Bediaga I, Blaylock G, Bracker SB, Burchat PR, Burnstein RA, Carter T, Carvalho HS, Copty NK, Cremaldi LM, Darling C, Denisenko K, Devmal S, Fernandez A, Fox GF, Gagnon P, Göbel C, Gounder K, Halling AM, Herrera G, Hurvits G, James C, Kasper PA, Kwan S, Langs DC, Leslie J, Lundberg B, Magnin J, Massafferri A, MayTal-Beck S, Meadows B, de Mello Neto JR, Mihalcea D, Milburn RH, de Miranda JM, Napier A, Nguyen A, d'Oliveira AB, O'Shaughnessy K, Peng KC, Perera LP, Purohit MV, Quinn B, Radeztsky S, Rafatian A, Reay NW, Reidy JJ, dos Reis AC, Rubin HA, Sanders DA, Santha AK, Santoro AF, Schwartz AJ, Sheaff M, Sidwell RA, Slaughter AJ, Sokoloff MD, Solano Salinas CJ, Stanton NR, Stefanski RJ, Stenson K, Summers DJ, Takach S, Thorne K, Tripathi AK, Watanabe S, Weiss-Babai R, Wiener J, Witchey N, Wolin E, Yang SM, Yi D, Yoshida S, Zaliznyak R, and Zhang C

Abstract

We study the Dalitz plot of the decay D(+)-->K(-)pi(+)pi(+) with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known Kpi resonances and a uniform nonresonant term, we do not obtain an acceptable fit. If we allow the mass and width of the K(*)(0)(1430) to float, we obtain values consistent with those from PDG but the chi(2) per degree of freedom of the fit is still unsatisfactory. A good fit is found when we allow for the presence of an additional scalar resonance, with mass 797+/-19+/-43 MeV/c(2) and width 410+/-43+/-87 MeV/c(2). The mass and width of the K(*)(0)(1430) become 1459+/-7+/-5 MeV/c(2) and 175+/-12+/-12 MeV/c(2), respectively. Our results provide new information on the scalar sector in hadron spectroscopy.

Published
2002
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6. Direct measurement of the pion valence-quark momentum distribution, the pion light-cone wave function squared.

Author

Aitala EM, Amato S, Anjos JC, Appel JA, Ashery D, Banerjee S, Bediaga I, Blaylock G, Bracker SB, Burchat PR, Burnstein RA, Carter T, Carvalho HS, Copty NK, Cremaldi LM, Darling C, Denisenko K, Deval S, Fernandez A, Fox GF, Gagnon P, Gerzon S, Gobel C, Gounder K, Halling AM, Herrera G, Hurvits G, James C, Kasper PA, Kwan S, Langs DC, Leslie J, Lichtenstadt J, Lundberg B, MayTal-Beck S, Meadows B, de Mello Neto JR, Mihalcea D, Milburn RH, de Miranda JM, Napier A, Nguyen A, d'Oliveira AB, O'Shaughnessy K, Peng KC, Perera LP, Purohit MV, Quinn B, Radeztsky S, Rafatian A, Reay NW, Reidy JJ, dos Reis AC, Rubin HA, Sanders DA, Santha AK, Santoro AF, Schwartz AJ, Sheaff M, Sidwell RA, Slaughter AJ, Sokoloff MD, Solano J, Stanton NR, Stefanski RJ, Stenson K, Summers DJ, Takach S, Thorne K, Tripathi AK, Watanabe S, Weiss-Babai R, Wiener J, Witchey N, Wolin E, Yang SM, Yi D, Yoshida S, Zaliznyak R, and Zhang C

Abstract

We present the first direct measurements of the pion valence-quark momentum distribution which is related to the square of the pion light-cone wave function. The measurements were carried out using data on diffractive dissociation of 500 GeV/c pi(-) into dijets from a platinum target at Fermilab experiment E791. The results show that the /q&q> light-cone asymptotic wave function describes the data well for Q2 approximately 10 (GeV/c)(2) or more. We also measured the transverse momentum distribution of the diffractive dijets.

Published
2001
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7. Observation of color-transparency in diffractive dissociation of pions.

Author

Aitala EM, Amato S, Anjos JC, Appel JA, Ashery D, Banerjee S, Bediaga I, Blaylock G, Bracker SB, Burchat PR, Burnstein RA, Carter T, Carvalho HS, Copty NK, Cremaldi LM, Darling C, Denisenko K, Devmal S, Fernandez A, Fox GF, Gagnon P, Gerzon S, Gobel C, Gounder K, Halling AM, Herrera G, Hurvits G, James C, Kasper PA, Kwan S, Langs DC, Leslie J, Lichtenstadt J, Lundberg B, MayTal-Beck S, Meadows B, de Mello Neto JR, Mihalcea D, Milburn RH, de Miranda JM, Napier A, Nguyen A, d'Oliveira AB, O'Shaughnessy K, Peng KC, Perera LP, Purohit MV, Quinn B, Radeztsky S, Rafatian A, Reay NW, Reidy JJ, dos Reis AC, Rubin HA, Sanders DA, Santha AK, Santoro AF, Schwartz AJ, Sheaff M, Sidwell RA, Slaughter AJ, Sokoloff MD, Solano J, Stanton NR, Stefanski RJ, Stenson K, Summers DJ, Takach S, Thorne K, Tripathi AK, Watanabe S, Weiss-Babai R, Wiener J, Witchey N, Wolin E, Yang SM, Yi D, Yoshida S, Zaliznyak R, and Zhang C

Abstract

We have studied the diffractive dissociation into dijets of 500 GeV/c pions scattering coherently from carbon and platinum targets. Extrapolating to asymptotically high energies (where t(min)-->0), we find that when the per-nucleus cross section for this process is parametrized as sigma = sigma0Aalpha, alpha has values near 1.6, the exact result depending on jet transverse momentum. These values are in agreement with those predicted by theoretical calculations of color-transparency.

Published
2001
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8. Search for rare and forbidden Charm Meson decays D0 --> Vl+l- and hhll.

Author

Aitala EM, Amato S, Anjos JC, Appel JA, Ashery D, Banerjee S, Bediaga I, Blaylock G, Bracker SB, Burchat PR, Burnstein RA, Carter T, Carvalho HS, Copty NK, Cremaldi LM, Darling C, Denisenko K, Devmal S, Fernandez A, Fox GF, Gagnon P, Gobel C, Gounder K, Halling AM, Herrera G, Hurvits G, James C, Kasper PA, Kwan S, Langs DC, Leslie J, Lundberg B, Magnin J, MayTal-Beck S, Meadows B, de Mello Neto JR, Mihalcea D, Milburn RH, de Miranda JM, Napier A, Nguyen A, d'Oliveira AB, O'Shaughnessy K, Peng KC, Perera LP, Purohit MV, Quinn B, Radeztsky S, Rafatian A, Reay NW, Reidy JJ, dos Reis AC, Rubin HA, Sanders DA, Santha AK, Santoro AF, Schwartz AJ, Sheaff M, Sidwell RA, Slaughter AJ, Sokoloff MD, Solano J, Stanton NR, Stefanski RJ, Stenson K, Summers DJ, Takach S, Thorne K, Tripathi AK, Watanabe S, Weiss-Babai R, Wiener J, Witchey N, Wolin E, Yang SM, Yi D, Yoshida S, Zaliznyak R, and Zhang C

Abstract

We report results of a search for flavor-changing neutral current (FCNC), lepton flavor, and lepton-number violating decays of the D0 (and its antiparticle) into three and four bodies. Using data from Fermilab charm hadroproduction experiment E791, we examine modes with two leptons (muons or electrons) and a rho(0), K( *0), or straight phi vector meson or a nonresonant pi(pi), Kpi, or KK pair of pseudoscalar mesons. No evidence for any of these decays is found. Therefore, we present branching-fraction upper limits at 90% confidence level for the 27 decay modes examined (18 new).

Published
2001
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9. Experimental evidence for a light and broad scalar resonance in D(+) --> pi(-)pi(+)pi(+) decay.

Author

Aitala EM, Amato S, Anjos JC, Appel JA, Ashery D, Banerjee S, Bediaga I, Blaylock G, Bracker SB, Burchat PR, Burnstein RA, Carter T, Carvalho HS, Copty NK, Cremaldi LM, Darling C, Denisenko K, Devmal S, Fernandez A, Fox GF, Gagnon P, Gobel C, Gounder K, Halling AM, Herrera G, Hurvits G, James C, Kasper PA, Kwan S, Langs DC, Leslie J, Lundberg B, Magnin J, Massafferri A, MayTal-Beck S, Meadows B, de Mello Neto JR, Mihalcea D, Milburn RH, de Miranda JM, Napier A, Nguyen A, d'Oliveira AB, O'Shaughnessy K, Peng KC, Perera LP, Purohit MV, Quinn B, Radeztsky S, Rafatian A, Reay NW, Reidy JJ, dos Reis AC, Rubin HA, Sanders DA, Santha AK, Santoro AF, Schwartz AJ, Sheaff M, Sidwell RA, Slaughter AJ, Sokoloff MD, Solano J, Stanton NR, Stefanski RJ, Stenson K, Summers DJ, Takach S, Thorne K, Tripathi AK, Watanabe S, Weiss-Babai R, Wiener J, Witchey N, Wolin E, Yang SM, Yi D, Yoshida S, Zaliznyak R, and Zhang C

Abstract

From a sample of 1172 +/- 61 D(+)-->pi(-)pi(+)pi(+) decays, we find gamma(D(+)-->pi(-)pi(+)pi(+))/gamma(D(+)-->K-pi(+)pi(+)) = 0.0311 +/- 0.0018(+0.0016)(-0.0026). Using a coherent amplitude analysis to fit the Dalitz plot of these decays, we find strong evidence that a scalar resonance of mass 478(+24)(-23) +/- 17 MeV/c(2) and width 324(+42)(-40) +/- 21 MeV/c(2) accounts for approximately half of all decays.

Published
2001
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10. Study of the D(+)(s)-->pi(-)pi(+)pi(+) decay and measurement of f(0) masses and widths.

Author

Aitala EM, Amato S, Anjos JC, Appel JA, Ashery D, Banerjee S, Bediaga I, Blaylock G, Bracker SB, Burchat PR, Burnstein RA, Carter T, Carvalho HS, Copty NK, Cremaldi LM, Darling C, Denisenko K, Devmal S, Fernandez A, Fox GF, Gagnon P, Gobel C, Gounder K, Halling AM, Herrera G, Hurvits G, James C, Kasper PA, Kwan S, Langs DC, Leslie J, Lundberg B, Magnin J, Massafferri A, MayTal-Beck S, Meadows B, de Mello Neto JR, Mihalcea D, Milburn RH, de Miranda JM, Napier A, Nguyen A, d'Oliveira AB, O'Shaughnessy K, Peng KC, Perera LP, Purohit MV, Quinn B, Radeztsky S, Rafatian A, Reay NW, Reidy JJ, dos Reis AC, Rubin HA, Sanders DA, Santha AK, Santoro AF, Schwartz AJ, Sheaff M, Sidwell RA, Slaughter AJ, Sokoloff MD, Solano J, Stanton NR, Stefanski RJ, Stenson K, Summers DJ, Takach S, Thorne K, Tripathi AK, Watanabe S, Weiss-Babai R, Wiener J, Witchey N, Wolin E, Yang SM, Yi D, Yoshida S, Zaliznyak R, and Zhang C

Abstract

From a sample of 848+/-44 D(+)(s)-->pi(-)pi(+)pi(+) decays, we find gamma(D(+)(s)-->pi(-)pi(+)pi(+))/gamma(D(+)(s)-->straight phipi(+)) = 0.245+/-0.028(+0.019)(-0.012). Using a Dalitz plot analysis of this three body decay, we find significant contributions from the channels rho(0)(770)pi(+), rho(0)(1450)pi(+), f(0)(980)pi(+), f(2)(1270)pi(+), and f(0)(1370)pi(+). We also present the values obtained for masses and widths of the resonances f(0)(980) and f(0)(1370).

Published
2001
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11. Hemispheric control of motor function: a whole brain echo planar fMRI study.

Author

Mattay VS, Callicott JH, Bertolino A, Santha AK, Van Horn JD, Tallent KA, Frank JA, and Weinberger DR

Subjects
Adult, Cerebellum diagnostic imaging, Cerebellum physiology, Female, Functional Laterality, Humans, Male, Motor Cortex physiology, Parietal Lobe diagnostic imaging, Parietal Lobe physiology, Putamen diagnostic imaging, Putamen physiology, Radionuclide Imaging, Echo-Planar Imaging, Motor Cortex diagnostic imaging, Movement physiology
Abstract

The aim of this study was to explore whether recruitment of the ipsilateral motor cortex during non-dominant motor movement reflects left hemispheric control of motor function or simply the greater complexity or unfamiliarity of the motor task. BOLD fMRI was performed in normal right-handers during two motor tasks: (1) sequential finger movements (SM task) with the right or left hand; and (2) random finger movements (RM task) with the right hand. In all subjects, activation was predominantly in the contralateral motor areas (primary sensorimotor, lateral premotor, parietal and supplementary motor regions) and ipsilateral cerebellum. While the ipsilateral motor areas were also activated, single subject analysis revealed these areas to be more extensive and to be seen in more subjects during the non-dominant hand SM task and dominant hand RM task than during the more familiar dominant hand SM task. Similarly, group analysis also revealed ipsilateral activation in the primary sensorimotor and lateral premotor areas, but only during the non-dominant SM task and the dominant hand RM task. Non-dominant hand movements, perhaps because they are less 'automatic', appear to require more cortical activity similar to complex tasks with the dominant hand, and result in greater recruitment of ipsilateral cortical motor areas and striatum. The study also illustrates how potentially meaningful subtleties seen on individual maps may be obscured with group averaging approaches.

Published
1998
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12. Abnormal functional lateralization of the sensorimotor cortex in patients with schizophrenia.

Author

Mattay VS, Callicott JH, Bertolino A, Santha AK, Tallent KA, Goldberg TE, Frank JA, and Weinberger DR

Subjects
Adult, Analysis of Variance, Case-Control Studies, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Motor Cortex pathology, Psychomotor Performance physiology, Schizophrenia pathology, Somatosensory Cortex pathology, Brain Mapping methods, Functional Laterality physiology, Motor Cortex physiopathology, Schizophrenia physiopathology, Somatosensory Cortex physiopathology
Abstract

Previous neuroimaging studies have suggested that patients with schizophrenia fail to recruit appropriate focal patterns of cortical responses to cognitive tasks. We investigated whether patients with schizophrenia show a normal focal response to a simple motor task. Seven strongly right-handed patients with schizophrenia and seven strongly right-handed normal subjects performed motor tasks of increasing complexity. Patients were unable to recruit as focal a response even to a simple, automatic sequential finger movement task. They showed greater ipsilateral activation in the primary sensorimotor and lateral premotor regions and had a significantly lower laterality quotient than normal subjects. These phenomena increased with the complexity of the task. These results demonstrate a functional disturbance in the cortical motor circuitry of patients with schizophrenia.

Published
1997
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13. Analysis of interpolation effects in the reslicing of functional MR images.

Author

Ostuni JL, Santha AK, Mattay VS, Weinberger DR, Levin RL, and Frank JA

Subjects
Algorithms, Echo-Planar Imaging methods, Fourier Analysis, Humans, Image Enhancement methods, Motor Skills physiology, Time Factors, Brain physiology, Image Processing, Computer-Assisted methods, Magnetic Resonance Imaging methods
Abstract

Purpose: Typically, the final step in volume registration is the reslicing of the volume of interest. The purpose of this work is to examine the effects of this reslicing on functional MRI (fMRI) data using different interpolation methods., Method: Functional whole-brain echo planar imaging (EPI) volumes were resliced using six different interpolation methods: trilinear, tricubic splines, and a 3D sinc function using a rectangular and a Hanning window, both with half-window lengths of 3 and 4 voxels., Results: Interpolation by tricubic spline and 3D sinc using a Hanning window had comparable errors, although tricubic spline interpolation was computationally the fastest. Interpolation by trilinear and 3D sinc using a rectangular window had relatively large errors, although the speed of trilinear makes it desirable for some applications., Conclusion: Interpolations using all of the tested methods adversely affected the fMRI data, although these effects differed for each method.

Published
1997
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14. Effect of magnetization transfer on the measurement of cerebral blood flow using steady-state arterial spin tagging approaches: a theoretical investigation.

Author

McLaughlin AC, Ye FQ, Pekar JJ, Santha AK, and Frank JA

Subjects
Corpus Callosum blood supply, Humans, Mathematics, Spin Labels, Blood Flow Velocity physiology, Brain physiology, Cerebrovascular Circulation, Magnetic Resonance Imaging methods, Models, Theoretical
Abstract

A simple four-compartment model for magnetization transfer was used to obtain theoretical expressions for the relationship between regional cerebral blood flow and delta M, the change in longitudinal magnetization of brain water spins when arterial water spins are perturbed. The theoretical relationship can be written in two forms, depending on the approach used to normalize delta M. Using the first approach, the calculation of cerebral blood flow requires a knowledge of R1(omega 1, delta omega), the longitudinal relaxation rate observed in the presence of continuous off-resonance RF irradiation. Using the second approach, the calculation of cerebral blood flow requires a knowledge of R1(omega 1, delta omega), where R1(omega 1, delta omega) is given by the product of R1(omega 1, delta omega) and the fractional steady-state longitudinal water magnetization in the presence of off-resonance RF irradiation. If the off-resonance RF irradiation used for arterial tagging does not produce appreciable magnetization transfer effects, R1(omega 1, delta omega) can be approximated by the longitudinal relaxation rate measured in the absence of off-resonance RF irradiation, R1obs. Theoretical expressions obtained by using the four-component model for magnetization transfer are compared with equivalent expressions obtained by using two-compartment models.

Published
1997
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15. Whole-brain functional mapping with isotropic MR imaging.

Author

Mattay VS, Frank JA, Santha AK, Pekar JJ, Duyn JH, McLaughlin AC, and Weinberger DR

Subjects
Adult, Echo-Planar Imaging, Female, Humans, Male, Brain Mapping, Magnetic Resonance Imaging methods
Abstract

Purpose: To assess the reliability and sensitivity of gradient-echo, isotropic multisection echo-planar magnetic resonance (MR) imaging for within-subject whole-brain mapping., Materials and Methods: Eight right-handed healthy volunteers underwent gradient-echo, echo-planar MR imaging while they performed a motor task on three occasions over 2-3 months. Ninety-six whole-brain volumes were acquired in 8 minutes 48 seconds. A rigorous statistical threshold for determining activation was set at P < .05 and was Bonferroni corrected for approximately 15,000 cortical voxels., Results: In all subjects, reproducible activation was demonstrated in multiple cortical areas and in the cerebellum specific to the motor system. Of the activated voxels, 75%-78% were confined to the motor areas during all sessions. No statistically significant difference was found in the proportion of activated voxels in any motor region (relative to the total number of activated voxels in the whole brain) across the three sessions. The centers of mass of the activated areas were within 2.5 resolution elements of the image across the three sessions., Conclusion: Isotropic multisection echo-planar MR imaging, has the potential for noninvasive, reliable within-subject mapping of whole-brain functional anatomy.

Published
1996
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16. Fast 3D functional magnetic resonance imaging at 1.5 T with spiral acquisition.

Author

Yang Y, Glover GH, van Gelderen P, Mattay VS, Santha AK, Sexton RH, Ramsey NF, Moonen CT, Weinberger DR, Frank JA, and Duyn JH

Subjects
Humans, Motor Cortex pathology, Brain pathology, Magnetic Resonance Imaging methods
Abstract

A new method to perform rapid 3D fMRI in human brain is introduced and evaluated in normal subjects, on a standard clinical scanner at 1.5 Tesla. The method combines a highly stable gradient echo technique with a spiral scan method, to detect brain activation related changes in blood oxygenation with high sensitivity. A motor activation paradigm with a duration of less than 5 min, performed on 10 subjects, consistently showed significant changes in signal intensity in the area of the motor cortex. In all subjects, these changes survived high statistical thresholds.

Published
1996
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17. Search for D0D-bar0 Mixing in Semileptonic Decay Modes.

Author

Aitala EM, Amato S, Anjos JC, Appel JA, Ashery D, Banerjee S, Bediaga I I, Blaylock G, Bracker SB, Burchat PR, Burnstein RA, Carter T, Carvalho HS, Copty NK, Costa I I, Cremaldi LM, Darling C, Denisenko K, Fernandez A, Gagnon P, Gerzon S, Gobel C, Gounder K, Halling AM, Herrera G, Hurvits G, James C, Kasper PA, Kwan S, Langs DC, Leslie J, Lundberg B, MayTal-Beck S, Meadows B, de Mello Neto JR, Milburn RH, de Miranda JM, Napier A, Nguyen A, d'Oliveira AB, O'Shaughnessy K, Peng KC, Perera LP, Purohit MV, Quinn B, Radeztsky S, Rafatian A, Reay NW, Reidy JJ, dos Reis AC, Rubin HA, Santha AK, Santoro AF, Schwartz AJ, Sheaff M, Sidwell RA, Slaughter AJ, Sokoloff MD, Stanton NR, Stenson K, Sugano K, Summers DJ, Takach S, and Thorne K

Published
1996
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18. Three-dimensional "BURST" functional magnetic resonance imaging: initial clinical applications.

Author

Mattay VS, Frank JA, Duyn JH, Kotrla KJ, Santha AK, Esposito G, Sexton RH, Barker P, Sunderland T, Moonen CT, and Weinberger DR

Subjects
Adult, Aged, Alzheimer Disease physiopathology, Blood Volume physiology, Carotid Stenosis diagnosis, Carotid Stenosis physiopathology, Cerebellum blood supply, Cerebral Cortex blood supply, Cerebral Infarction diagnosis, Cerebral Infarction physiopathology, Cerebrovascular Disorders physiopathology, Contrast Media, Female, Gadolinium DTPA, Humans, Male, Middle Aged, Organometallic Compounds, Pentetic Acid analogs & derivatives, Regional Blood Flow physiology, Alzheimer Disease diagnosis, Cerebrovascular Disorders diagnosis, Image Processing, Computer-Assisted instrumentation, Magnetic Resonance Imaging instrumentation
Published
1996
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19. Search for the flavor-changing neutral-current decays D+--> pi + micro+ micro- and D+--> pi +e+e-

Author

Aitala EM, Amato S, Anjos JC, Appel JA, Ashery D, Banerjee S, Bediaga I I, Blaylock G, Bracker SB, Burchat PR, Burnstein RA, Carter T, Carvalho HS, Costa I I, Cremaldi LM, Darling C, Denisenko K, Fernandez A, Gagnon P, Gerzon S, Gobel C, Gounder K, Granite D, Halling AM, Herrera G, Hurvits G, James C, Kasper PA, Kondakis N, Kwan S, Langs DC, Leslie J, Lichtenstadt J, Lundberg B, Manacero A, MayTal-Beck S, Meadows B, de Mello Neto JR, Milburn RH, de Miranda JM, Napier A, Nguyen A, d'Oliveira AB, O'Shaughnessy K, Peng KC, Perera LP, Purohit MV, Quinn B, Radeztsky S, Rafatian A, Reay NW, Reidy JJ, dos Reis AC, Rubin HA, Santha AK, Santoro AF, Schwartz AJ, Sheaff M, Sidwell RA, Slaughter AJ, Smith JG, Sokoloff MD, Stanton NR, and Sugano K

Published
1996
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