Professor Todd Huffman: Publications

Top-quark mass measurement from dilepton events at CDF II.

Phys Rev Lett 96:15 (2006) 152002

Authors:

A Abulencia, D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, J-F Arguin, T Arisawa, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, P Azzurri, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, V Bartsch, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, A Belloni, E Ben-Haim, D Benjamin, A Beretvas, J Beringer, T Berry, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, V Boisvert, G Bolla, A Bolshov, D Bortoletto, J Boudreau, S Bourov, A Boveia, B Brau, C Bromberg, E Brubaker, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, M Campanelli, M Campbell, F Canelli, A Canepa, D Carlsmith, R Carosi, S Carron, M Casarsa, A Castro, P Catastini, D Cauz, M Cavalli-Sforza, A Cerri, L Cerrito, SH Chang, J Chapman, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, JP Chou, PH Chu, SH Chuang, K Chung, WH Chung, YS Chung, M Ciljak, CI Ciobanu, MA Ciocci, A Clark, D Clark, M Coca, A Connolly, ME Convery, J Conway, B Cooper, K Copic, M Cordelli, G Cortiana, A Cruz, J Cuevas, R Culbertson, D Cyr, S DaRonco, S D'Auria, M D'Onofrio, D Dagenhart, P de Barbaro, S De Cecco, A Deisher, G De Lentdecker, M Dell'Orso, S Demers, L Demortier, J Deng, M Deninno, D De Pedis, PF Derwent, C Dionisi, J Dittmann, P Dituro, C Dörr, A Dominguez, S Donati, M Donega, P Dong, J Donini, T Dorigo, S Dube, K Ebina, J Efron, J Ehlers, R Erbacher, D Errede, S Errede, R Eusebi, HC Fang, S Farrington, I Fedorko, WT Fedorko, RG Feild, M Feindt, JP Fernandez, R Field, G Flanagan, LR Flores-Castillo, A Foland, S Forrester, GW Foster, M Franklin, JC Freeman, Y Fujii, I Furic, A Gajjar, M Gallinaro, J Galyardt, JE Garcia, M Garcia Sciverez, AF Garfinkel, C Gay, H Gerberich, E Gerchtein, D Gerdes, S Giagu, P Giannetti, A Gibson, K Gibson, C Ginsburg, K Giolo, M Giordani, M Giunta, G Giurgiu, V Glagolev, D Glenzinski, M Gold, N Goldschmidt, J Goldstein, G Gomez, G Gomez-Ceballos, M Goncharov, O González, I Gorelov, AT Goshaw, Y Gotra, K Goulianos, A Gresele, M Griffiths, S Grinstein, C Grosso-Pilcher, U Grundler, J Guimaraes da Costa, C Haber, SR Hahn, K Hahn, E Halkiadakis, A Hamilton, B-Y Han, R Handler, F Happacher, K Hara, M Hare, S Harper, RF Harr, RM Harris, K Hatakeyama, J Hauser, C Hays, H Hayward, A Heijboer, B Heinemann, J Heinrich, M Hennecke, M Herndon, J Heuser, D Hidas, CS Hill, D Hirschbuehl, A Hocker, A Holloway, S Hou, M Houlden, S-C Hsu, BT Huffman, RE Hughes, J Huston, K Ikado, J Incandela, G Introzzi, M Iori, Y Ishizawa, A Ivanov, B Iyutin, E James, D Jang, B Jayatilaka, D Jeans, H Jensen, EJ Jeon, M Jones, KK Joo, SY Jun, TR Junk, T Kamon, J Kang, M Karagoz-Unel, PE Karchin, Y Kato, Y Kemp, R Kephart, U Kerzel, V Khotilovich, B Kilminster, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kim, M Kirby, L Kirsch, S Klimenko, M Klute, B Knuteson, BR Ko, H Kobayashi, K Kondo, DJ Kong, J Konigsberg, K Kordas, A Korytov, AV Kotwal, A Kovalev, J Kraus, I Kravchenko, M Kreps, A Kreymer, J Kroll, N Krumnack, M Kruse, V Krutelyov, SE Kuhlmann, Y Kusakabe, S Kwang, AT Laasanen, S Lai, S Lami, S Lami, S Lammel, M Lancaster, RL Lander, K Lannon, A Lath, G Latino, I Lazzizzera, C Lecci, T LeCompte, J Lee, J Lee, SW Lee, R Lefèvre, N Leonardo, S Leone, S Levy, JD Lewis, K Li, C Lin, CS Lin, M Lindgren, E Lipeles, TM Liss, A Lister, DO Litvintsev, T Liu, Y Liu, NS Lockyer, A Loginov, M Loreti, P Loverre, R-S Lu, D Lucchesi, P Lujan, P Lukens, G Lungu, L Lyons, J Lys, R Lysak, E Lytken, P Mack, D MacQueen, R Madrak, K Maeshima, T Maki, P Maksimovic, G Manca, F Margaroli, R Marginean, C Marino, A Martin, M Martin, V Martin, M Martínez, T Maruyama, H Matsunaga, ME Mattson, R Mazini, P Mazzanti, KS McFarland, D McGivern, P McIntyre, P McNamara, R McNulty, A Mehta, S Menzemer, A Menzione, P Merkel, C Mesropian, A Messina, M von der Mey, T Miao, N Miladinovic, J Miles, R Miller, JS Miller, C Mills, M Milnik, R Miquel, S Miscetti, G Mitselmakher, A Miyamoto, N Moggi, B Mohr, R Moore, M Morello, P Movilla Fernandez, J Mülmenstädt, A Mukherjee, M Mulhearn, Th Muller, R Mumford, P Murat, J Nachtman, S Nahn, I Nakano, A Napier, D Naumov, V Necula, C Neu, MS Neubauer, J Nielsen, T Nigmanov, L Nodulman, O Norniella, T Ogawa, SH Oh, YD Oh, T Okusawa, R Oldeman, R Orava, K Osterberg, C Pagliarone, E Palencia, R Paoletti, V Papadimitriou, A Papikonomou, AA Paramonov, B Parks, S Pashapour, J Patrick, G Pauletta, M Paulini, C Paus, DE Pellett, A Penzo, TJ Phillips, G Piacentino, J Piedra, K Pitts, C Plager, L Pondrom, G Pope, X Portell, O Poukhov, N Pounder, F Prakoshyn, A Pronko, J Proudfoot, F Ptohos, G Punzi, J Pursley, J Rademacker, A Rahaman, A Rakitin, S Rappoccio, F Ratnikov, B Reisert, V Rekovic, N van Remortel, P Renton, M Rescigno, S Richter, F Rimondi, K Rinnert, L Ristori, WJ Robertson, A Robson, T Rodrigo, E Rogers, S Rolli, R Roser, M Rossi, R Rossin, C Rott, A Ruiz, J Russ, V Rusu, D Ryan, H Saarikko, S Sabik, A Safonov, WK Sakumoto, G Salamanna, O Salto, D Saltzberg, C Sanchez, L Santi, S Sarkar, K Sato, P Savard, A Savoy-Navarro, T Scheidle, P Schlabach, EE Schmidt, MP Schmidt, M Schmitt, T Schwarz, L Scodellaro, AL Scott, A Scribano, F Scuri, A Sedov, S Seidel, Y Seiya, A Semenov, F Semeria, L Sexton-Kennedy, I Sfiligoi, MD Shapiro, T Shears, PF Shepard, D Sherman, M Shimojima, M Shochet, Y Shon, I Shreyber, A Sidoti, A Sill, P Sinervo, A Sisakyan, J Sjolin, A Skiba, AJ Slaughter, K Sliwa, D Smirnov, JR Smith, FD Snider, R Snihur, M Soderberg, A Soha, S Somalwar, V Sorin, J Spalding, F Spinella, P Squillacioti, M Stanitzki, A Staveris-Polykalas, R St Denis, B Stelzer, O Stelzer-Chilton, D Stentz, J Strologas, D Stuart, JS Suh, A Sukhanov, K Sumorok, H Sun, T Suzuki, A Taffard, R Tafirout, R Takashima, Y Takeuchi, K Takikawa, M Tanaka, R Tanaka, M Tecchio, PK Teng, K Terashi, S Tether, J Thom, AS Thompson, E Thomson, P Tipton, V Tiwari, S Tkaczyk, D Toback, K Tollefson, T Tomura, D Tonelli, M Tönnesmann, S Torre, D Torretta, S Tourneur, W Trischuk, R Tsuchiya, S Tsuno, N Turini, F Ukegawa, T Unverhau, S Uozumi, D Usynin, L Vacavant, A Vaiciulis, S Vallecorsa, A Varganov, E Vataga, G Velev, G Veramendi, V Veszpremi, T Vickey, R Vidal, I Vila, R Vilar, I Vollrath, I Volobouev, F Würthwein, P Wagner, RG Wagner, RL Wagner, W Wagner, R Wallny, T Walter, Z Wan, MJ Wang, SM Wang, A Warburton, B Ward, S Waschke, D Waters, T Watts, M Weber, WC Wester, B Whitehouse, D Whiteson, AB Wicklund, E Wicklund, HH Williams, P Wilson, BL Winer, P Wittich, S Wolbers, C Wolfe, S Worm, T Wright, X Wu, SM Wynne, A Yagil, K Yamamoto, J Yamaoka, Y Yamashita, C Yang, UK Yang, WM Yao, GP Yeh, J Yoh, K Yorita, T Yoshida, I Yu, SS Yu, JC Yun, L Zanello, A Zanetti, I Zaw, F Zetti, X Zhang, J Zhou, S Zucchelli, CDF Collaboration

Abstract:

We report a measurement of the top-quark mass using events collected by the CDF II detector from pp collisions at square root of s = 1.96 TeV at the Fermilab Tevatron. We calculate a likelihood function for the top-quark mass in events that are consistent with tt --> bl(-)nu(l)bl'+ nu'(l) decays. The likelihood is formed as the convolution of the leading-order matrix element and detector resolution functions. The joint likelihood is the product of likelihoods for each of 33 events collected in 340 pb(-1) of integrated luminosity, yielding a top-quark mass M(t) = 165.2 +/- 6.1(stat) +/- 3.4(syst) GeV/c2. This first application of a matrix-element technique to tt --> bl+ nu(l)bl'- nu(l') decays gives the most precise single measurement of M(t) in dilepton events. Combined with other CDF run II measurements using dilepton events, we measure M(t) = 167.9 +/- 5.2(stat) +/- 3.7(syst) GeV/c2.

Measurement of the azimuthal angle distribution of leptons from W boson decays as a function of the W transverse momentum in pp ^- collisions at s=1.8TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 73:5 (2006)

Authors:

D Acosta, T Affolder, MG Albrow, D Ambrose, D Amidei, K Anikeev, J Antos, G Apollinari, T Arisawa, A Artikov, W Ashmanskas, F Azfar, P Azzi-Bacchetta, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, M Barone, G Bauer, F Bedeschi, S Behari, S Belforte, WH Bell, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, G Bolla, A Bolshov, D Bortoletto, J Boudreau, C Bromberg, E Brubaker, J Budagov, HS Budd, K Burkett, G Busetto, KL Byrum, S Cabrera, M Campbell, W Carithers, D Carlsmith, A Castro, D Cauz, A Cerri, L Cerrito, J Chapman, C Chen, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, ML Chu, JY Chung, WH Chung, YS Chung, CI Ciobanu, AG Clark, M Coca, A Connolly, M Convery, J Conway, M Cordelli, J Cranshaw, R Culbertson, D Dagenhart, S D'Auria, P De Barbaro, S De Cecco, S Dell'Agnello, M Dell'Orso, S Demers, L Demortier, M Deninno, D De Pedis, PF Derwent, C Dionisi, JR Dittmann, A Dominguez, S Donati, M D'Onofrio, T Dorigo, N Eddy, R Erbacher, D Errede, S Errede

Abstract:

We present the first measurement of the A2 and A3 angular coefficients of the W boson produced in proton-antiproton collisions. We study W→eνe and W→μνμ candidate events produced in association with at least one jet at CDF, during Run Ia and Run Ib of the Tevatron at s=1.8TeV. The corresponding integrated luminosity was 110pb-1. The jet balances the transverse momentum of the W and introduces QCD effects in W boson production. The extraction of the angular coefficients is achieved through the direct measurement of the azimuthal angle of the charged lepton in the Collins-Soper rest-frame of the W boson. The angular coefficients are measured as a function of the transverse momentum of the W boson. The electron, muon, and combined results are in good agreement with the standard model prediction, up to order αs2 in QCD. © 2006 The American Physical Society.

Evidence for the exclusive decay B(c)+- --> J/psi pi+- and measurement of the mass of the B(c)+- meson.

Phys Rev Lett 96:8 (2006) 082002

Authors:

A Abulencia, D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, J-F Arguin, T Arisawa, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, P Azzurri, N Bacchetta, H Bachocou, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, V Bartsch, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, A Belloni, E Ben-Haim, D Benjamin, A Beretvas, J Beringer, T Berry, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, V Boisvert, G Bolla, A Bolshov, D Bortoletto, J Boudreau, S Bourov, A Boveia, B Brau, C Bromberg, E Brubaker, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, M Campanelli, M Campbell, F Canelli, A Canepa, D Carlsmith, R Carosi, S Carron, M Casarsa, A Castro, P Catastini, D Cauz, M Cavalli-Sforza, A Cerri, L Cerrito, SH Chang, J Chapman, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, JP Chou, PH Chu, SH Chuang, K Chung, WH Chung, YS Chung, M Cijliak, CI Ciobanu, MA Ciocci, A Clark, D Clark, M Coca, A Connolly, M Convery, J Conway, B Cooper, K Copic, M Cordelli, G Cortiana, J Cranshaw, A Cruz, J Cuevas, R Culbertson, D Cyr, S Da Ronco, S D'Auria, M D'Onofrio, D Dagenhart, P de Barbaro, S De Cecco, A Deisher, G De Lentdecker, M Dell'Orso, S Demers, L Demortier, J Deng, M Deninno, D De Pedis, PF Derwent, T Devlin, C Dionisi, JR Dittmann, P DiTuro, C Dörr, A Dominguez, S Donati, M Donega, P Dong, J Donini, T Dorigo, S Dube, K Ebina, J Efron, J Ehlers, R Erbacher, D Errede, S Errede, R Eusebi, HC Fang, S Farrington, I Fedorko, WT Fedorko, RG Feild, M Feindt, JP Fernandez, R Field, G Flanagan, LR Flores-Castillo, A Foland, S Forrester, GW Foster, M Franklin, JC Freeman, Y Fujii, I Furic, A Gajjar, M Gallinaro, J Galyardt, JE Garcia, M Garcia Sciveres, AF Garfinkel, C Gay, H Gerberich, E Gerchtein, D Gerdes, S Giagu, P Giannetti, A Gibson, K Gibson, C Ginsburg, K Giolo, M Giordani, M Giunta, G Giurgiu, V Glagolev, D Glenzinski, M Gold, N Goldschmidt, J Goldstein, G Gomez, G Gomez-Ceballos, M Goncharov, O González, I Gorelov, AT Goshaw, Y Gotra, K Goulianos, A Gresele, M Griffiths, S Grinstein, C Grosso-Pilcher, U Grundler, J Guimaraes da Costa, C Haber, SR Hahn, K Hahn, E Halkiadakis, A Hamilton, B-Y Han, R Handler, F Happacher, K Hara, M Hare, S Harper, RF Harr, RM Harris, K Hatakeyama, J Hauser, C Hays, H Hayward, A Heijboer, B Heinemann, J Heinrich, M Hennecke, M Herndon, J Heuser, D Hidas, CS Hill, D Hirschbuehl, A Hocker, A Holloway, S Hou, M Houlden, S-C Hsu, BT Huffman, RE Hughes, J Huston, K Ikado, J Incandela, G Introzzi, M Iori, Y Ishizawa, A Ivanov, B Iyutin, E James, D Jang, B Jayatilaka, D Jeans, H Jensen, EJ Jeon, M Jones, KK Joo, SY Jun, TR Junk, T Kamon, J Kang, M Karagoz-Unel, PE Karchin, Y Kato, Y Kemp, R Kephart, U Kerzel, V Khotilovich, B Kilminster, DH Kim, HS Kim, JE Kim, MJ Kim, MS Kim, SB Kim, SH Kim, YK Kim, M Kirby, L Kirsch, S Klimenko, M Klute, B Knuteson, BR Ko, H Kobayashi, K Kondo, DJ Kong, J Konigsberg, K Kordas, A Korytov, AV Kotwal, A Kovalev, J Kraus, I Kravchenko, M Kreps, A Kreymer, J Kroll, N Krumnack, M Kruse, V Krutelyov, SE Kuhlmann, Y Kusakabe, S Kwang, AT Laasanen, S Lai, S Lami, S Lammel, M Lancaster, RL Lander, K Lannon, A Lath, G Latino, I Lazzizzera, C Lecci, T LeCompte, J Lee, J Lee, SW Lee, R Lefèvre, N Leonardo, S Leone, S Levy, JD Lewis, K Li, C Lin, CS Lin, M Lindgren, E Lipeles, TM Liss, A Lister, DO Litvintsev, T Liu, Y Liu, NS Lockyer, A Loginov, M Loreti, P Loverre, R-S Lu, D Lucchesi, P Lujan, P Lukens, G Lungu, L Lyons, J Lys, R Lysak, E Lytken, P Mack, D MacQueen, R Madrak, K Maeshima, P Maksimovic, G Manca, F Margaroli, R Marginean, C Marino, A Martin, M Martin, V Martin, M Martínez, T Maruyama, H Matsunaga, ME Mattson, R Mazini, P Mazzanti, KS McFarland, D McGivern, P McIntyre, P McNamara, R McNulty, A Mehta, S Menzemer, A Menzione, P Merkel, C Mesropian, A Messina, M von der Mey, T Miao, N Miladinovic, J Miles, R Miller, JS Miller, C Mills, M Milnik, R Miquel, S Miscetti, G Mitselmakher, A Miyamoto, N Moggi, B Mohr, R Moore, M Morello, P Movilla Fernandez, J Mülmenstädt, A Mukherjee, M Mulhearn, Th Muller, R Mumford, P Murat, J Nachtman, S Nahn, I Nakano, A Napier, D Naumov, V Necula, C Neu, MS Neubauer, L Nicolas, J Nielsen, T Nigmanov, L Nodulman, O Norniella, T Ogawa, SH Oh, YD Oh, T Okusawa, R Oldeman, R Orava, K Osterberg, C Pagliarone, E Palencia, R Paoletti, V Papadimitriou, A Papikonomou, AA Paramonov, B Parks, S Pashapour, J Patrick, G Pauletta, M Paulini, C Paus, DE Pellett, A Penzo, TJ Phillips, G Piacentino, J Piedra, K Pitts, C Plager, L Pondrom, G Pope, X Portell, O Poukhov, N Pounder, F Prakoshyn, A Pronko, J Proudfoot, F Ptohos, G Punzi, J Pursley, J Rademacker, A Rahaman, A Rakitin, S Rappoccio, F Ratnikov, B Reisert, V Rekovic, N van Remortel, P Renton, M Rescigno, S Richter, F Rimondi, K Rinnert, L Ristori, WJ Robertson, A Robson, T Rodrigo, E Rogers, S Rolli, R Roser, M Rossi, R Rossin, C Rott, A Ruiz, J Russ, V Rusu, D Ryan, H Saarikko, S Sabik, A Safonov, WK Sakumoto, G Salamanna, O Salto, D Saltzberg, C Sanchez, L Santi, S Sarkar, K Sato, P Savard, A Savoy-Navarro, T Scheidle, P Schlabach, EE Schmidt, MP Schmidt, M Schmitt, T Schwarz, L Scodellaro, AL Scott, A Scribano, F Scuri, A Sedov, S Seidel, Y Seiya, A Semenov, F Semeria, L Sexton-Kennedy, I Sfiligoi, MD Shapiro, T Shears, PF Shepard, D Sherman, M Shimojima, M Shochet, Y Shon, I Shreyber, A Sidoti, A Sill, P Sinervo, A Sisakyan, J Sjolin, A Skiba, AJ Slaughter, K Sliwa, D Smirnov, JR Smith, FD Snider, R Snihur, M Soderberg, A Soha, S Somalwar, V Sorin, J Spalding, M Spezziga, F Spinella, P Squillacioti, M Stanitzki, A Staveris-Polykalas, R St Denis, B Stelzer, O Stelzer-Chilton, D Stentz, J Strologas, D Stuart, JS Suh, A Sukhanov, K Sumorok, H Sun, T Suzuki, A Taffard, R Tafirout, R Takashima, Y Takeuchi, K Takikawa, M Tanaka, R Tanaka, M Tecchio, PK Teng, K Terashi, S Tether, J Thom, AS Thompson, E Thomson, P Tipton, V Tiwari, S Tkaczyk, D Toback, K Tollefson, T Tomura, D Tonelli, M Tönnesmann, S Torre, D Torretta, S Tourneur, W Trischuk, R Tsuchiya, S Tsuno, N Turini, F Ukegawa, T Unverhau, S Uozumi, D Usynin, L Vacavant, A Vaiciulis, S Vallecorsa, A Varganov, E Vataga, G Velev, G Veramendi, V Veszpremi, T Vickey, R Vidal, I Vila, R Vilar, I Vollrath, I Volobouev, F Würthwein, P Wagner, RG Wagner, RL Wagner, W Wagner, R Wallny, T Walter, Z Wan, MJ Wang, SM Wang, A Warburton, B Ward, S Waschke, D Waters, T Watts, M Weber, WC Wester, B Whitehouse, D Whiteson, AB Wicklund, E Wicklund, HH Williams, P Wilson, BL Winer, P Wittich, S Wolbers, C Wolfe, S Worm, T Wright, X Wu, SM Wynne, A Yagil, K Yamamoto, J Yamaoka, Y Yamashita, C Yang, UK Yang, WM Yao, GP Yeh, K Yi, J Yoh, K Yorita, T Yoshida, I Yu, SS Yu, JC Yun, L Zanello, A Zanetti, I Zaw, F Zetti, X Zhang, J Zhou, S Zucchelli, CDF Collaboration

Abstract:

We report the first evidence for a fully reconstructed decay mode of the B(c)+- meson in the channel B(c)+- --> J/psi pi+-, with J/psi --> mu+ mu-. The analysis is based on an integrated luminosity of 360 pb(-1) in pp collisions at 1.96 TeV center of mass energy collected by the Collider Detector at Fermilab. We observe 14.6 +/- 4.6 signal events with a background of 7.1 +/- 0.9 events, and a fit to the J/psi pi+-mass spectrum yields a B(c)+- mass of 6285.7 +/- 5.3(stat) +/- 1.2(syst) MeV/c2. The probability of a peak of this magnitude occurring by random fluctuation in the search region is estimated as 0.012%.

Precision top-quark mass measurement in the lepton+jets topology in pp̄ collisions at s=1.96TeV

Physical Review Letters 96:2 (2006)

Authors:

A Abulencia, D Acosta, J Adelman, T Affolder, T Akimoto, MG Albrow, D Ambrose, S Amerio, D Amidei, A Anastassov, K Anikeev, A Annovi, J Antos, M Aoki, G Apollinari, JF Arguin, T Arisawa, A Artikov, W Ashmanskas, A Attal, F Azfar, P Azzi-Bacchetta, P Azzurri, N Bacchetta, H Bachacou, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, S Baroiant, V Bartsch, G Bauer, F Bedeschi, S Behari, S Belforte, G Bellettini, J Bellinger, A Belloni, E Ben-Haim, D Benjamin, A Beretvas, J Beringer, T Berry, A Bhatti, M Binkley, D Bisello, M Bishai, RE Blair, C Blocker, K Bloom, B Blumenfeld, A Bocci, A Bodek, V Boisvert, G Bolla, A Bolshov, D Bortoletto, J Boudreau, S Bourov, A Boveia, B Brau, C Bromberg, E Brubaker, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, KL Byrum, S Cabrera, M Campanelli, M Campbell, F Canelli, A Canepa, D Carlsmith, R Carosi, S Carron, M Casarsa, A Castro, P Catastini, D Cauz, M Cavalli-Sforza, A Cerri, L Cerrito, SH Chang, J Chapman, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, I Cho, K Cho, D Chokheli, JP Chou, PH Chu, SH Chuang, K Chung, WH Chung

Abstract:

We report two measurements of the top-quark mass Mtop using the CDF II detector at the Fermilab Tevatron in a 318pb-1 data sample of tt̄ events in the lepton+jets final state. One method uses an event-based likelihood technique resulting in Mtop=173.2-2.4+2.6(stat)±3.2(syst)GeV/c2 or 173.2-4.0+4.1GeV/c2. The second method reconstructs a top-quark mass in each event using the measured invariant mass of the hadronically decaying W boson to constrain the jet energy scale to obtain a value for Mtop of 173.5-3.6+3.7(stat)±1.3(syst)GeV/c2 or 173.5-3.8+3.9GeV/c2. We take the latter, which is more precise, as our result. © 2006 The American Physical Society.

Search for neutral Higgs Bosons of the minimal supersymmetric standard model decaying to τ pairs in pp̄ collisions at s=1.96TeV

Physical Review Letters 96:1 (2006)

Authors:

Abstract:

We present a search for neutral supersymmetric Higgs bosons decaying to τ pairs produced in pp̄ collisions at s=1.96TeV. The data, corresponding to 310pb-1 integrated luminosity, were collected with the Collider Detector at Fermilab in runII of the Tevatron. No significant excess above the standard model backgrounds is observed. We set exclusion limits on the production cross section times branching fraction to τ pairs for Higgs boson masses in the range from 90 to 250GeV/c2. © 2006 The American Physical Society.

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