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Study of ψ(2S) decays to γpp̄, π0pp̄, and ηpp̄, and search for pp̄ threshold enhancements

Physical Review D - Particles, Fields, Gravitation and Cosmology 82:9 (2010)

Authors:

JP Alexander, DG Cassel, S Das, R Ehrlich, L Fields, L Gibbons, SW Gray, DL Hartill, BK Heltsley, DL Kreinick, VE Kuznetsov, JR Patterson, D Peterson, D Riley, A Ryd, AJ Sadoff, X Shi, WM Sun, J Yelton, P Rubin, N Lowrey, S Mehrabyan, M Selen, J Wiss, J Libby, M Kornicer, RE Mitchell, MR Shepherd, CM Tarbert, D Besson, TK Pedlar, J Xavier, D Cronin-Hennessy, J Hietala, P Zweber, S Dobbs, Z Metreveli, KK Seth, A Tomaradze, T Xiao, S Brisbane, L Martin, A Powell, P Spradlin, G Wilkinson, H Mendez, JY Ge, DH Miller, IPJ Shipsey, B Xin, GS Adams, D Hu, B Moziak, J Napolitano, KM Ecklund, J Insler, H Muramatsu, CS Park, LJ Pearson, EH Thorndike, F Yang, S Ricciardi, C Thomas, M Artuso, S Blusk, R Mountain, T Skwarnicki, S Stone, JC Wang, LM Zhang, G Bonvicini, D Cinabro, A Lincoln, MJ Smith, P Zhou, J Zhu, P Naik, J Rademacker, DM Asner, KW Edwards, K Randrianarivony, G Tatishvili, RA Briere, H Vogel, PUE Onyisi, JL Rosner

Abstract:

The decays of ψ(2S) into γpp̄, π0pp̄, and ηpp̄ have been studied with the CLEO-c detector using a sample of 24.5×106 ψ(2S) events obtained from e⊃+e⊃- annihilations at √s=3686MeV. The data show evidence for the excitation of several N⊃* resonances in pπ0 and pη channels in π0pp̄ and ηpp̄ decays, and f2 states in γpp̄ decay. Branching fractions for decays of ψ(2S) to γpp̄, π0pp̄, and ηpp̄ have been determined. No evidence for pp̄ threshold enhancements was found in the reactions ψ(2S)→Xpp̄, where X=γ, π0, η. We do, however, find confirming evidence for a pp̄ threshold enhancement in J/ψ→γpp̄ as previously reported by BES. © 2010 The American Physical Society.
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The detection of a population of submillimeter-bright, strongly lensed galaxies.

Science 330:6005 (2010) 800-804

Authors:

Mattia Negrello, R Hopwood, G De Zotti, A Cooray, A Verma, J Bock, DT Frayer, MA Gurwell, A Omont, R Neri, H Dannerbauer, LL Leeuw, E Barton, J Cooke, S Kim, E da Cunha, G Rodighiero, P Cox, DG Bonfield, MJ Jarvis, S Serjeant, RJ Ivison, S Dye, I Aretxaga, DH Hughes, E Ibar, F Bertoldi, I Valtchanov, S Eales, L Dunne, SP Driver, R Auld, S Buttiglione, A Cava, CA Grady, DL Clements, A Dariush, J Fritz, D Hill, JB Hornbeck, L Kelvin, G Lagache, M Lopez-Caniego, J Gonzalez-Nuevo, S Maddox, E Pascale, M Pohlen, EE Rigby, A Robotham, C Simpson, DJB Smith, P Temi, MA Thompson, BE Woodgate, DG York, JE Aguirre, A Beelen, A Blain, AJ Baker, M Birkinshaw, R Blundell, CM Bradford, D Burgarella, L Danese, JS Dunlop, S Fleuren, J Glenn, AI Harris, J Kamenetzky, RE Lupu, RJ Maddalena, BF Madore, PR Maloney, H Matsuhara, MJ Michaowski, EJ Murphy, BJ Naylor, H Nguyen, C Popescu, S Rawlings, D Rigopoulou, D Scott, KS Scott, M Seibert, I Smail, RJ Tuffs, JD Vieira, PP van der Werf, J Zmuidzinas

Abstract:

Gravitational lensing is a powerful astrophysical and cosmological probe and is particularly valuable at submillimeter wavelengths for the study of the statistical and individual properties of dusty star-forming galaxies. However, the identification of gravitational lenses is often time-intensive, involving the sifting of large volumes of imaging or spectroscopic data to find few candidates. We used early data from the Herschel Astrophysical Terahertz Large Area Survey to demonstrate that wide-area submillimeter surveys can simply and easily detect strong gravitational lensing events, with close to 100% efficiency.
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The detection of a population of submillimeter-bright, strongly lensed galaxies

Science 330:6005 (2010) 800-804

Authors:

M Negrello, R Hopwood, G De Zotti, A Cooray, A Verma, J Bock, DT Frayer, MA Gurwell, A Omont, R Neri, H Dannerbauer, LL Leeuw, E Barton, J Cooke, S Kim, E Da Cunha, G Rodighiero, P Cox, DG Bonfield, MJ Jarvis, S Serjeant, RJ Ivison, S Dye, I Aretxaga, DH Hughes, E Ibar, F Bertoldi, I Valtchanov, S Eales, L Dunne, SP Driver, R Auld, S Buttiglione, A Cava, CA Grady, DL Clements, A Dariush, J Fritz, D Hill, JB Hornbeck, L Kelvin, G Lagache, M Lopez-Caniego, J Gonzalez-Nuevo, S Maddox, E Pascale, M Pohlen, EE Rigby, A Robotham, C Simpson, DJB Smith, P Temi, MA Thompson, BE Woodgate, DG York, JE Aguirre, A Beelen, A Blain, AJ Baker, M Birkinshaw, R Blundell, CM Bradford, D Burgarella, L Danese, JS Dunlop, S Fleuren, J Glenn, AI Harris, J Kamenetzky, RE Lupu, RJ Maddalena, BF Madore, PR Maloney, H Matsuhara, MJ Michaowski, EJ Murphy, BJ Naylor, H Nguyen, C Popescu, S Rawlings, D Rigopoulou, D Scott, KS Scott, M Seibert, I Smail, RJ Tuffs, JD Vieira, PP Van Der Werf, J Zmuidzinas

Abstract:

Gravitational lensing is a powerful astrophysical and cosmological probe and is particularly valuable at submillimeter wavelengths for the study of the statistical and individual properties of dusty star-forming galaxies. However, the identification of gravitational lenses is often time-intensive, involving the sifting of large volumes of imaging or spectroscopic data to find few candidates. We used early data from the Herschel Astrophysical Terahertz Large Area Survey to demonstrate that wide-area submillimeter surveys can simply and easily detect strong gravitational lensing events, with close to 100% efficiency.
More details from the publisher

The Detection of a Population of Submillimeter-Bright, Strongly-Lensed Galaxies

(2010)

Authors:

Mattia Negrello, R Hopwood, G De Zotti, A Cooray, A Verma, J Bock, DT Frayer, MA Gurwell, A Omont, R Neri, H Dannerbauer, LL Leeuw, E Barton, J Cooke, S Kim, E da Cunha, G Rodighiero, P Cox, DG Bonfield, MJ Jarvis, S Serjeant, RJ Ivison, S Dye, I Aretxaga, DH Hughes, E Ibar, F Bertoldi, I Valtchanov, S Eales, L Dunne, SP Driver, R Auld, S Buttiglione, A Cava, CA Grady, DL Clements, A Dariush, J Fritz, D Hill, JB Hornbeck, L Kelvin, G Lagache, M Lopez-Caniego, J Gonzalez-Nuevo, S Maddox, E Pascale, M Pohlen, EE Rigby, A Robotham, C Simpson, DJB Smith, P Temi, MA Thompson, BE Woodgate, DG York, JE Aguirre, A Beelen, A Blain, AJ Baker, M Birkinshaw, R Blundell, CM Bradford, D Burgarella, L Danese, JS Dunlop, S Fleuren, J Glenn, AI Harris, J Kamenetzky, RE Lupu, RJ Maddalena, BF Madore, PR Maloney, H Matsuhara, MJ Michalowski, EJ Murphy, BJ Naylor, H Nguyen, C Popescu, S Rawlings, D Rigopoulou, D Scott, KS Scott, M Seibert, I Smail, RJ Tuffs, JD Vieira, PP van der Werf, J Zmuidzinas
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Search for the supersymmetric partner of the top quark in pp̄ collisions at √s=1.96TeV

Physical Review D - Particles, Fields, Gravitation and Cosmology 82:9 (2010)

Authors:

T Aaltonen, B Álvarez gonzález, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, JA Appel, A Apresyan, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, B Auerbach, A Aurisano, F Azfar, W Badgett, A Barbaro-Galtieri, VE Barnes, BA Barnett, P Barria, P Bartos, M Bauce, G Bauer, F Bedeschi, D Beecher, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, I Bizjak, KR Bland, C Blocker, B Blumenfeld, A Bocci, A Bodek, D Bortoletto, J Boudreau, A Boveia, B Brau, L Brigliadori, A Brisuda, C Bromberg, E Brucken, M Bucciantonio, J Budagov, HS Budd, S Budd, K Burkett, G Busetto, P Bussey, A Buzatu, S Cabrera, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, A Canepa, B Carls, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, YC Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, JP Chou, WH Chung, YS Chung, CI Ciobanu, MA Ciocci, A Clark, D Clark, G Compostella, ME Convery, J Conway, M Corbo, M Cordelli, CA Cox, DJ Cox, F Crescioli

Abstract:

We present a search for the lightest supersymmetric partner of the top quark in proton-antiproton collisions at a center-of-mass energy √s=1.96TeV. This search was conducted within the framework of the R parity conserving minimal supersymmetric extension of the standard model, assuming the stop decays dominantly to a lepton, a sneutrino, and a bottom quark. We searched for events with two oppositely-charged leptons, at least one jet, and missing transverse energy in a data sample corresponding to an integrated luminosity of 1fb⊃-1 collected by the Collider Detector at Fermilab experiment. No significant evidence of a stop quark signal was found. Exclusion limits at 95% confidence level in the stop quark versus sneutrino mass plane are set. Stop quark masses up to 180GeV/c2 are excluded for sneutrino masses around 45GeV/c2, and sneutrino masses up to 116GeV/c2 are excluded for stop quark masses around 150GeV/c2. © 2010 The American Physical Society.
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