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arXiv · 1107.3875

Search for a Heavy Top-Like Quark in p\bar{p} Collisions at {\surd}s = 1.96 TeV

CDF Collaboration·T. Aaltonen·B. Álvarez Gonzálezv·S. Amerio·D. Amidei·A. Anastassov·A. Annovi·J. Antos·G. Apollinari·J. A. Appel·A. Apresyan·T. Arisawa·A. Artikov·J. Asaadi·W. Ashmanskas·B. Auerbach·A. Aurisano·F. Azfar·W. Badgett·A. Barbaro-Galtieri·V. E. Barnes·B. A. Barnett·P. Barriaee·P. Bartos·M. Baucecc·G. Bauer·F. Bedeschi·D. Beecher·S. Behari·G. Bellettinidd·J. Bellinger·D. Benjamin·A. Beretvas·A. Bhatti·M. Binkley·D. Bisellocc·I. Bizjakii·K. R. Bland·C. Blocker·B. Blumenfeld·A. Bocci·A. Bodek·D. Bortoletto·J. Boudreau·A. Boveia·B. Braua·L. Brigliadoribb·A. Brisuda·C. Bromberg·E. Brucken·M. Bucciantoniodd·J. Budagov·H. S. Budd·S. Budd·K. Burkett·G. Busettocc·P. Bussey·A. Buzatu·S. Cabrerax·C. Calancha·S. Camarda·M. Campanelli·M. Campbell·F. Canelli·A. Canepa·B. Carls·D. Carlsmith·R. Carosi·S. Carrillok·S. Carron·B. Casal·M. Casarsa·A. Castrobb·P. Catastini·D. Cauz·V. Cavaliereee·M. Cavalli-Sforza·A. Cerrif·L. Cerritoq·Y. C. Chen·M. Chertok·G. Chiarelli·G. Chlachidze·F. Chlebana·K. Cho·D. Chokheli·J. P. Chou·W. H. Chung·Y. S. Chung·C. I. Ciobanu·M. A. Ciocciee·A. Clark·D. Clark·G. Compostellacc·M. E. Convery·J. Conway·M. Corbo·M. Cordelli·C. A. Cox·D. J. Cox
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Abstract

We present the results of a search for pair production of a heavy top-like (t') quark decaying to Wq final states using data corresponding to an integrated luminosity of 5.6 fb-1 collected by the CDF II detector in pp collisions at {\surd}s = 1.96 TeV. We perform parallel searches for t' \to Wb and t' \to Wq (where q is a generic down-type quark) in events containing a lepton and four or more jets. By performing a fit to the two-dimensional distribution of total transverse energy versus reconstructed t quark mass, we set upper limits on the t \bar{t} production cross section and exclude a standard model fourth-generation t' quark decaying to W b (W q) with mass below 358 (340) GeV/c2 at 95% CL.

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CDF Collaboration, T. Aaltonen, B. Álvarez Gonzálezv, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, J. A. Appel, A. Apresyan, T. Arisawa, A. Artikov, J. Asaadi, W. Ashmanskas, B. Auerbach, A. Aurisano, F. Azfar, W. Badgett, A. Barbaro-Galtieri, V. E. Barnes, B. A. Barnett, P. Barriaee, P. Bartos, M. Baucecc, G. Bauer, F. Bedeschi, D. Beecher, S. Behari, G. Bellettinidd, J. Bellinger, D. Benjamin, A. Beretvas, A. Bhatti, M. Binkley, D. Bisellocc, I. Bizjakii, K. R. Bland, C. Blocker, B. Blumenfeld, A. Bocci, A. Bodek, D. Bortoletto, J. Boudreau, A. Boveia, B. Braua, L. Brigliadoribb, A. Brisuda, C. Bromberg, E. Brucken, M. Bucciantoniodd, J. Budagov, H. S. Budd, S. Budd, K. Burkett, G. Busettocc, P. Bussey, A. Buzatu, S. Cabrerax, C. Calancha, S. Camarda, M. Campanelli, M. Campbell, F. Canelli, A. Canepa, B. Carls, D. Carlsmith, R. Carosi, S. Carrillok, S. Carron, B. Casal, M. Casarsa, A. Castrobb, P. Catastini, D. Cauz, V. Cavaliereee, M. Cavalli-Sforza, A. Cerrif, L. Cerritoq, Y. C. Chen, M. Chertok, G. Chiarelli, G. Chlachidze, F. Chlebana, K. Cho, D. Chokheli, J. P. Chou, W. H. Chung, Y. S. Chung, C. I. Ciobanu, M. A. Ciocciee, A. Clark, D. Clark, G. Compostellacc, M. E. Convery, J. Conway, M. Corbo, M. Cordelli, C. A. Cox, D. J. Cox. 2011-07-20. Search for a Heavy Top-Like Quark in p\bar{p} Collisions at {\surd}s = 1.96 TeV. https://doi.org/10.1103/physrevlett.107.261801

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