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Evidence for t(t)over-bar gamma production and measurement of sigma(t(t)over-bar gamma)/sigma(t(t)over-bar)open access
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- Lath, A[Lath, A.]; Yu, SS[Yu, S. S.]; Aaltonen, T[Aaltonen, T.]; Latino, G[Latino, G.]; Yun, JC[Yun, J. C.]; Gonzalez, BA[Alvarez Gonzalez, B.]; Lazzizzera, I[Lazzizzera, I.]; Zanetti, A[Zanetti, A.]; Amerio, S[Amerio, S.]; LeCompte, T[LeCompte, T.]; Zeng, Y[Zeng, Y.]; Amidei, D[Amidei, D.]; Lee, E[Lee, E.]; Zucchelli, S[Zucchelli, S.]; Anastassov, A[Anastassov, A.]; Lee, HS[Lee, H. S.]; Annovi, A[Annovi, A.]; Lee, JS[Lee, J. S.]; Antos, J[Antos, J.]; Lee, SW[Lee, S. W.]; Apollinari, G[Apollinari, G.]; Leo, S[Leo, S.]; Appel, JA[Appel, J. A.]; Leone, S[Leone, S.]; Apresyan, A[Apresyan, A.]; Lewis, JD[Lewis, J. D.]; Arisawa, T[Arisawa, T.]; Lin, CJ[Lin, C. -J.]; Artikov, A[Artikov, A.]; Linacre, J[Linacre, J.]; Asaadi, J[Asaadi, J.]; Lindgren, M[Lindgren, M.]; Ashmanskas, W[Ashmanskas, W.]; Lipeles, E[Lipeles, E.]; Auerbach, B[Auerbach, B.]; Lister, A[Lister, A.]; Aurisano, A[Aurisano, A.]; Litvintsev, DO[Litvintsev, D. O.]; Azfar, F[Azfar, F.]; Liu, C[Liu, C.]; Badgett, W[Badgett, W.]; Liu, Q[Liu, Q.]; Barbaro-Galtieri, A[Barbaro-Galtieri, A.]; Liu, T[Liu, T.]; Barnes, VE[Barnes, V. E.]; Lockwitz, S[Lockwitz, S.]; Barnett, BA[Barnett, B. A.]; Lockyer, NS[Lockyer, N. S.]; Barria, P[Barria, P.]; Loginov, A[Loginov, A.]; Bartos, P[Bartos, P.]; Lucchesi, D[Lucchesi, D.]; Bauce, M[Bauce, M.]; Lueck, J[Lueck, J.]; Bauer, G[Bauer, G.]; Lujan, P[Lujan, P.]; Bedeschi, F[Bedeschi, F.]; Lukens, P[Lukens, P.]; Beecher, D[Beecher, D.]; Lungu, G[Lungu, G.]; Behari, S[Behari, S.]; Lys, J[Lys, J.]; Bellettini, G[Bellettini, G.]; Lysak, R[Lysak, R.]; Bellinger, J[Bellinger, J.]; Madrak, R[Madrak, R.]; Benjamin, D[Benjamin, D.]; Maeshima, K[Maeshima, K.]; Beretvas, A[Beretvas, A.]; Makhoul, K[Makhoul, K.]; Bhatti, A[Bhatti, A.]; Maksimovic, P[Maksimovic, P.]; Binkley, M[Binkley, M.]; Malik, S[Malik, S.]; Bisello, D[Bisello, D.]; Manca, G[Manca, G.]; Bizjak, I[Bizjak, I.]; Manousakis-Katsikakis, A[Manousakis-Katsikakis, A.]; Bland, KR[Bland, K. R.]; Margaroli, F[Margaroli, F.]; Blumenfeld, B[Blumenfeld, B.]; Marino, C[Marino, C.]; Bocci, A[Bocci, A.]; Martinez, M[Martinez, M.]; Bodek, A[Bodek, A.]; Martinez-Ballarin, R[Martinez-Ballarin, R.]; Bortoletto, D[Bortoletto, D.]; Mastrandrea, P[Mastrandrea, P.]; Boudreau, J[Boudreau, J.]; Mathis, M[Mathis, M.]; Boveia, A[Boveia, A.]; Mattson, ME[Mattson, M. E.]; Brau, B[Brau, B.]; Mazzanti, P[Mazzanti, P.]; Brigliadori, L[Brigliadori, L.]; McFarland, KS[McFarland, K. S.]; Brisuda, A[Brisuda, A.]; McIntyre, P[McIntyre, P.]; Bromberg, C[Bromberg, C.]; McNulty, R[McNulty, R.]; Brucken, E[Brucken, E.]; Mehta, A[Mehta, A.]; Bucciantonio, M[Bucciantonio, M.]; Mehtala, P[Mehtala, P.]; Budagov, J[Budagov, J.]; Menzione, A[Menzione, A.]; Budd, HS[Budd, H. 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- Issue Date
- 31-Aug-2011
- Citation
- PHYSICAL REVIEW D, v.84, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW D
- Volume
- 84
- Number
- 3
- ISSN
- 1550-7998
- Abstract
- Using data corresponding to 6.0 fb(-1) of p (p) over bar collisions at root s = 1.96 TeV collected by the CDF II detector, we present a cross section measurement of top-quark pair production with an additional radiated photon in the central region with 10 GeV or more of transverse energy t (t) over bar gamma. The events are selected by looking for a lepton (l or mu), a photon (gamma), significant transverse momentum imbalance (is not an element of(T)), large total transverse energy, and three or more jets, with at least one identified as containing a b quark (b). Using an event selection optimized for the t (t) over bar gamma candidate sample, we also measure the cross section of t (t) over bar (sigma(t (t) over bar)). We measure the t (t) over bar gamma cross section (sigma(t (t) over bar gamma)) to be 0.18 +/- 0.08 pb, and the ratio of sigma(t (t) over bar gamma) to sigma(t (t) over bar) to be 0.024 +/- 0.009. We observe a probability of 0.0015 (3.0 standard deviations) of the background (non-t (t) over bar gamma events alone producing 30 events or more.
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