Searches for new physics in diphoton events in pp̄ collisions at √s = 1.8 TeV
(451)
Abe, F
q
Akimoto, H
am
Akopian, A
ae
Albrow, M G
g
Amadon, A
e
Amendolia, S R
aa
Amidei, D
t
Antos, J
ag
Aota, S
ak
Apollinari, G
ae
Arisawa, T
am
Asakawa, T
ak
Ashmanskas, W
e
Atac, M
g
Azzi Bacchetta, P
y
Bacchetta, N
y
Bagdasarov, S
ae
Bailey, M W
v
De Barbara, P
ad
Barbaro Galtieri, A
r
Barnes, V E
ac
Barnett, B A
o
Barone, M
i
Bauer, G
s
Baumann, T
k
Bedeschi, F
aa
Behrends, S
c
Belforte, S
aa
Bellettini, G
aa
Bellinger, J
an
Benjamin, D
ai
Bensinger, J
c
Beretvas, A
g
Berge, J P
g
Berryhill, J
e
Bertolucci, S
i
Bettelli, S
aa
Bevensee, B
z
Bhatti, A
ae
Biery, K
g
Bigongiari, C
aa
Binkley, M
g
Bisello, D
y
Blair, R E
a
Blocker, C
c
Bloom, K
t
Blusk, S
ad
Bodek, A
ad
Bikhari, W
z
Bolla, G
ac
Bonushkin, Y
d
Bortoletto, D
ac
Boudreau, J
ab
Breccia, L
b
Bromberg, C
u
Burner, N
v
Brunetti, R
b
Buckley Geer, E
g
Budd, H S
ad
Burkett, K
k
Busetto, G
y
Byon Wagner, A
g
Byrum, K L
a
Campbell, M
t
Caner, A
aa
Carithers, W
r
Carlsmith, D
an
Cassada, J
ad
Castro, A
y
Cauz, D
aj
Cerri, A
aa
Chang, P S
ag
Chang, P T
ag
Chao, H Y
ag
Chapman, J
t
Cheng, M T
ag
Chertok, M
ah
Chiarelli, G
aa
Chiou, C N
ag
Chlebana, F
g
Christofek, L
m
Cropp, R
n,ap
Chu, M L
ag
Cihangir, S
g
Clark, A G
j
Cobal, M
aa
Cocca, E
aa
Contreras, M
e
Conway, J
af
Cooper, J
g
Cordelli, M
i
Costanzo, D
aa
Couyoumtzelis, C
j
Cronin Hennessy, D
f
Culbertson, R
e
Dagenhart, D
al
Daniels, T
s
DeJongh, F
g
Dell'Agnello, S
i
Dell'Orso, M
aa
Demina, R
g
Demortier, L
ae
Deninno, M
b
Derwent, P F
g
Devlin, T
af
Dittmann, J R
f
Donati, S
aa
Done, J
ah
Dorigo, T
y
Eddy, N
m
Einsweiler, K
r
Elias, J E
g
Ely, R
r
Engels Jr , E
ab
Erdmann, W
g
Errede, D
m
Errede, S
m
Fan, Q
ad
Feild, R G
ao
Feng, Z
o
Ferretti, C
aa
Fiori, I
b
Flaugher, B
g
Foster, G W
g
Franklin, M
k
Freeman, J
g
Friedman, J
s
Frisch, H
e
Fukui, Y
q
Gadomski, S
n,ap
Galeotti, S
aa
Gallinaro, M
z
Ganel, O
ai
Garcia Sciveres, M
r
Garfinkel, A F
ac
Gay, C
ao
Geer, S
g
Gerdes, D W
t
Giannetti, P
aa
Giokaris, N
ae
Giromini, P
i
Giusti, G
aa
Gold, M
v
Gordon, A
k
Goshaw, A T
f
Gotra, Y
ab
Goulianos, K
ae
Grassmann, H
aj
Green, C
ac
Groer, L
af
Grosso Pilcher, C
e
Guillian, G
t
Guimaraes Da Costa, J
o
Guo, R S
ag
Haber, C
r
Hafen, E
s
Hahn, S R
g
Hamilton, R
k
Handa, T
l
Handler, R
an
Hao, W
ai
Happacher, F
i
Hara, K
ak
Hardman, A D
ac
Harris, R M
g
Hartmann, F
p
Hausser, J
d
Hayashi, E
ak
Heinrich, J
z
Heiss, A
p
Hinrichsen, B
n,ap
Hoffman, K D
ac
Holck, C
z
Hollebeek, R
z
Holloway, L
m
Huang, Z
t
Huffman, B T
ab
Hughes, R
w
Huston, J
u
Huth, J
k
Ikeda, H
ak
Incagli, M
aa
Incandela, J
g
Introzzi, G
aa
Iwai, J
am
Iwata, Y
l
James, E
t
Jensen, H
g
Joshi, U
g
Kajfasz, E
y
Kambara, H
j
Kamon, T
ah
Kaneko, T
ak
Karr, K
al
Kasha, H
ao
Kato, Y
x
Keaffaber, T A
ac
Kelley, K
s
Kennedy, R D
g
Kephart, R
g
Kestenbaum, D
k
Khazins, D
f
Kikuchi, T
ak
Kim, B J
aa
Kim, H S
n,ap
Kim, S H
ak
Kim, Y K
r
Kirsch, L
c
Klimenko, S
h
Knoblauch, D
p
Koehn, P
w
Kongeter A
p
Kondo, K
ak
Konigsberg, J
h
Kordas, K
n,ap
Korytov, A
h
Kovacs, E
a
Kowald, W
f
Kroll, J
z
Kruse, M
ad
Kuhlmann, S E
a
Kuns, E
af
Kurino, K
l
Kuwabara, T
ak
Laasanen, A T
ac
Lami, S
aa
Lammel, S
g
Lamoureux, J I
c
Lancaster, M
r
Lanzoni, M
aa
Latino, G
aa
LeCompte, T
a
Leone, S
aa
Lewis, J D
g
Lindgren, M
d
Liss, T M
m
Liu, J B
ad
Liu, Y C
ag
Lockyer, N
z
Long, O
z
Loreti, M
y
Lucchesi, D
aa
Lukens, P
g
Lusin, S
an
Lys, J
r
Maeshima, K
g
Maksimovic, P
k
Mangano, M
aa
Mariotti, M
y
Marriner, J P
g
Martignon, G
y
Martin, A
ao
Matthews, J A J
v
Mazzanti, P
b
McFarland, K
ad
McIntyre, P
ah
Melese, P
ae
Menguzzato, M
y
Menzione, A
aa
Meschi, E
aa
Metzler, S
z
Miao, C
t
Miao, T
g
Michail, G
k
Miller, R
u
Minato, H
ak
Miscetti, S
i
Mishina, M
q
Miyashita, S
ak
Moggi, N
aa
Moore, E
v
Morita, Y
q
Mukherjee, A
g
Muller, T
p
Munar, A
aa
Murat, P
aa
Murgia, S
u
Musy, M
aj
Nakada, H
ak
Nakaya, T
e
Nakano, I
l
Nelson, C
g
Neuberger, D
p
Newman Holmes, C
g
Ngan, C Y P
s
Nodulman, L
a
Nomerotski, A
h
Oh, S H
f
Ohmoto, T
l
Ohsugi, T
l
Oishi, R
ak
Okabe, M
ak
Okusawa, T
x
Olsen, J
an
Pagliarone, C
aa
Paoletti, R
aa
Papadimitriou, V
ai
Pappas, S P
ao
Parashar, N
aa
Parri, A
i
Patrick, J
g
Pauletta, G
aj
Paulini, M
r
Perazzo, A
aa
Pescara, L
y
Peters, M D
r
Phillips, T J
f
Piacentino, G
aa
Pillai, M
ad
Pitts, K T
g
Plunkett, R
g
Pompos, A
ac
Pondrom, L
an
Proudfoot, J
a
Ptohos, F
k
Punzi, G
aa
Ragan, K
n,ap
Reher, D
r
Reischl, M
o
Ribon, A
y
Rimondi, F
b
Ristori, L
aa
Robertson, W J
f
Robinson, A
n,ap
Rodrigo, T
aa
Rolli, S
al
Rosenson, L
s
Roser, R
m
Saab, T
n,ap
Sakumoto, W K
ad
Saltzberg, D
d
Sansoni, A
i
Santi, L
aj
Sato, H
ak
Schlabach, P
q
Schmidt, E E
g
Schmidt, M P
ao
Scott, A
d
Scribano, A
aa
Segler, S
g
Seidel, S
v
Seiya, Y
ak
Semeria, F
b
Shah, T
s
Shapiro, M D
r
Shaw, N M
ac
Shepard, P F
ab
Shibayama, T
ai
Shimojima, M
ak
Shochet, M
e
Siegrist, J
r
Sill, A
ai
Sinervo, P
n,ap
Singh, P
m
Sliwa, K
al
Smith, C
o
Snider, F D
o
Spalding, J
g
Speer, T
j
Sphicas, P
s
Spinella, F
aa
Spiropulu, M
k
Spiegel, L
g
Stanco, L
y
Steele, J
an
Stefanini, A
aa
Strohmer R
g
Strologas, J
m
Strumia, F
j
Stuart, D
g
Sumorok, K
s
Suzuki, J
ak
Suzuki, T
ak
Takahashi, T
x
Takano, T
x
Takashima, R
l
Takikawa, K
ak
Tanaka, M
ak
Tannenbaum, B
d
Tartarelli, F
aa
Taylor, W
n,ap
Tecchio, M
t
Teng, P K
ag
Teramoto, Y
x
Terashi, K
ak
Tether, S
s
Theriot, D
g
Thomas, T L
v
Thurman Keup, R
a
Timko, M
al
Tipton, P
ad
Titov, A
ae
Tkaczyk, S
g
Toback, D
e
Tollefson, K
ad
Tollestrup, A
g
Toyoda, H
x
Trischuk, W
n,ap
De Troconiz, J F
k
Truitt, S
t
Tseng, J
s
Turini, N
aa
Uchida, T
ak
Ukegawa, F
z
Valls, J
af
Van Den Brink, S C
o
Vejcik III, S
t
Velev, G
aa
Volobouev, I
r
Vidal, R
g
Vilar, R
g
Vucinic, D
s
Wagner, R G
a
Wagner, R L
g
Wahl, J
e
Wallace, N B
aa
Walsh, A M
af
Wang, C
f
Wang, C H
ag
Wang, M J
ag
Warburton, A
n,ap
Watanabe, T
ak
Watts, T
af
Webb, R
ah
Wei, C
f
Wenzel, H
p
Wester III, W C
g
Wicklund, A B
a
Wicklund, E
g
Wilkinson, R
z
Williams, H H
z
Wilson, P
g
Winer, B L
w
Winn, D
t
Wolinski, D
t
Wolinski, J
u
Worm, S
v
Wu, X
j
Wyss, J
aa
Yagil, A
g
Yao, W
r
Yasuoka, K
ak
Yeh, G P
g
Yeh, P
ag
Yoh, J
g
Yosef, C
u
Yoshida, T
x
Yu, I
g
Zanetti, A
aj
Zetti, F
aa
Zucchelli, S
b
more..
|
-
1
-
-
33750664194
-
-
S. L. Glashow, Nucl. Phys. 22, 579 (1961); S. Weinberg, Phys. Rev. Lett. 19, 1264 (1967); A. Salam, in Elementary Particle Theory: Relativistic Groups and Analyticity (Nobel Symposium No. 8), edited by N. Svartholm (Almqvist and Wiksell, Stockholm, 1968), p. 367.
-
(1961)
Nucl. Phys.
, vol.22
, pp. 579
-
-
Glashow, S.L.1
-
2
-
-
3342961156
-
-
S. L. Glashow, Nucl. Phys. 22, 579 (1961); S. Weinberg, Phys. Rev. Lett. 19, 1264 (1967); A. Salam, in Elementary Particle Theory: Relativistic Groups and Analyticity (Nobel Symposium No. 8), edited by N. Svartholm (Almqvist and Wiksell, Stockholm, 1968), p. 367.
-
(1967)
Phys. Rev. Lett.
, vol.19
, pp. 1264
-
-
Weinberg, S.1
-
3
-
-
33750664194
-
-
edited by N. Svartholm Almqvist and Wiksell, Stockholm
-
S. L. Glashow, Nucl. Phys. 22, 579 (1961); S. Weinberg, Phys. Rev. Lett. 19, 1264 (1967); A. Salam, in Elementary Particle Theory: Relativistic Groups and Analyticity (Nobel Symposium No. 8), edited by N. Svartholm (Almqvist and Wiksell, Stockholm, 1968), p. 367.
-
(1968)
Elementary Particle Theory: Relativistic Groups and Analyticity (Nobel Symposium No. 8)
, pp. 367
-
-
Salam, A.1
-
5
-
-
3042948780
-
-
(b) M. Dine, A. Nelson, Y. Nir, and Y. Shirman, Phys. Rev. D 53, 2658 (1996);
-
(1996)
Phys. Rev. D
, vol.53
, pp. 2658
-
-
Dine, M.1
Nelson, A.2
Nir, Y.3
Shirman, Y.4
-
6
-
-
4243874565
-
-
(c) S. Dimopoulos, M. Dine, S. Raby, and S. Thomas, Phys. Rev. Lett. 76, 3494 (1996);
-
(1996)
Phys. Rev. Lett.
, vol.76
, pp. 3494
-
-
Dimopoulos, S.1
Dine, M.2
Raby, S.3
Thomas, S.4
-
10
-
-
0001134840
-
-
(g) S. Ambrosanio, G. Kane, G. Kribs, S. Martin, and S. Mrenna, Phys. Rev. D 54, 5395 (1996);
-
(1996)
Phys. Rev. D
, vol.54
, pp. 5395
-
-
Ambrosanio, S.1
Kane, G.2
Kribs, G.3
Martin, S.4
Mrenna, S.5
-
11
-
-
0001675470
-
-
(h) J. Bagger, K. Matchev, D. Pierce, and R. Zhang, ibid. 55, 3188 (1997);
-
(1997)
Phys. Rev. D
, vol.55
, pp. 3188
-
-
Bagger, J.1
Matchev, K.2
Pierce, D.3
Zhang, R.4
-
12
-
-
0001613815
-
-
H. Baer, M. Brhlik, C. Chen, and X. Tata, ibid. 55, 4463 (1997).
-
(1997)
Phys. Rev. D
, vol.55
, pp. 4463
-
-
Baer, H.1
Brhlik, M.2
Chen, C.3
Tata, X.4
-
14
-
-
0001289368
-
-
(b) S. Ambrosanio, G. Kane, G. Kribs, S. Martin, and S. Mrenna, Phys. Rev. Lett. 76, 3498 (1996);
-
(1996)
Phys. Rev. Lett.
, vol.76
, pp. 3498
-
-
Ambrosanio, S.1
Kane, G.2
Kribs, G.3
Martin, S.4
Mrenna, S.5
-
15
-
-
0000460688
-
-
(c) S. Ambrosanio, G. Kane, G. Kribs, S. Martin, and S. Mrenna, Phys. Rev. D 55, 1372 (1997).
-
(1997)
Phys. Rev. D
, vol.55
, pp. 1372
-
-
Ambrosanio, S.1
Kane, G.2
Kribs, G.3
Martin, S.4
Mrenna, S.5
-
16
-
-
0001474409
-
-
See for example (a) G. Bhattacharyya and R. Mohapatra, Phys. Rev. D 54, 4204 (1996); (b) J. Rosner, ibid. 55, 3143 (1997); (c) K. Lane, Phys. Lett. B 357, 624 (1995).
-
(1996)
Phys. Rev. D
, vol.54
, pp. 4204
-
-
Bhattacharyya, G.1
Mohapatra, R.2
-
17
-
-
0009396555
-
-
See for example (a) G. Bhattacharyya and R. Mohapatra, Phys. Rev. D 54, 4204 (1996); (b) J. Rosner, ibid. 55, 3143 (1997); (c) K. Lane, Phys. Lett. B 357, 624 (1995).
-
(1997)
Phys. Rev. D
, vol.55
, pp. 3143
-
-
Rosner, J.1
-
18
-
-
0001187046
-
-
See for example (a) G. Bhattacharyya and R. Mohapatra, Phys. Rev. D 54, 4204 (1996); (b) J. Rosner, ibid. 55, 3143 (1997); (c) K. Lane, Phys. Lett. B 357, 624 (1995).
-
(1995)
Phys. Lett. B
, vol.357
, pp. 624
-
-
Lane, K.1
-
20
-
-
85104159665
-
-
note
-
T.
-
-
-
-
21
-
-
17544377991
-
-
10th Topical Workshop on Proton-Antiproton Collider Physics, edited by R. Raja and J. Yoh, AIP, New York.
-
S. Park, in 10th Topical Workshop on Proton-Antiproton Collider Physics, edited by R. Raja and J. Yoh, AIP Conf. Proc. No. 357 (AIP, New York. 1995), p. 62. The electromagnetic cluster at large η passes all the standard electron selection criteria. However, there is some indication that this cluster is not from an electron. This is discussed in Sec. IV.
-
(1995)
AIP Conf. Proc. No. 357
, pp. 62
-
-
Park, S.1
-
22
-
-
4243241954
-
-
Ph.D. thesis, University of Chicago
-
D. Toback, Ph.D. thesis, University of Chicago, 1997; CDF Collaboration, F. Abe et al., Phys. Rev. Lett. 81, 1791 (1998).
-
(1997)
-
-
Toback, D.1
-
23
-
-
4243241954
-
-
D. Toback, Ph.D. thesis, University of Chicago, 1997; CDF Collaboration, F. Abe et al., Phys. Rev. Lett. 81, 1791 (1998).
-
(1998)
Phys. Rev. Lett.
, vol.81
, pp. 1791
-
-
Abe, F.1
-
26
-
-
25944454399
-
-
0's) in CDF see CDF Collaboration, F. Abe et al., Phys. Rev. D 48, 2998 (1993); Phys. Rev. Lett. 73, 2662 (1994).
-
(1993)
Phys. Rev. D
, vol.48
, pp. 2998
-
-
Abe, F.1
-
27
-
-
4244171859
-
-
0's) in CDF see CDF Collaboration, F. Abe et al., Phys. Rev. D 48, 2998 (1993); Phys. Rev. Lett. 73, 2662 (1994).
-
(1994)
Phys. Rev. Lett.
, vol.73
, pp. 2662
-
-
-
28
-
-
30244541588
-
-
CDF Collaboration, F. Abe et al., Phys. Rev. D 52, 4784 (1995).
-
(1995)
Phys. Rev. D
, vol.52
, pp. 4784
-
-
Abe, F.1
-
29
-
-
24844454982
-
-
CDF Collaboration, F. Abe et al., Phys. Rev. D 52, 2624 (1995). A much larger portion of the plug calorimeter is used to identify electrons than in the top-quark measurements of Ref. [13].
-
(1995)
Phys. Rev. D
, vol.52
, pp. 2624
-
-
Abe, F.1
-
30
-
-
26144458741
-
-
CDF Collaboration, F. Abe et al., Phys. Rev. D 50, 2966 (1994); F. Abe et al., Phys. Rev. Lett. 74, 2626 (1995). The b-jet identification used here is the SECVTX algorithm only.
-
(1994)
Phys. Rev. D
, vol.50
, pp. 2966
-
-
Abe, F.1
-
31
-
-
4243421500
-
-
CDF Collaboration, F. Abe et al., Phys. Rev. D 50, 2966 (1994); F. Abe et al., Phys. Rev. Lett. 74, 2626 (1995). The b-jet identification used here is the SECVTX algorithm only.
-
(1995)
Phys. Rev. Lett.
, vol.74
, pp. 2626
-
-
Abe, F.1
-
32
-
-
4243376781
-
-
CDF Collaboration, F. Abe et al., Phys. Rev. Lett. 79, 3585 (1997). For more details see M. Hohlmann, Ph.D. thesis, University of Chicago, 1997.
-
(1997)
Phys. Rev. Lett.
, vol.79
, pp. 3585
-
-
Abe, F.1
-
33
-
-
4243376781
-
-
Ph.D. thesis, University of Chicago
-
CDF Collaboration, F. Abe et al., Phys. Rev. Lett. 79, 3585 (1997). For more details see M. Hohlmann, Ph.D. thesis, University of Chicago, 1997.
-
(1997)
-
-
Hohlmann, M.1
-
34
-
-
84884346716
-
-
Ph.D. thesis, The Johns Hopkins University
-
D. A. Glenzinski, Ph.D. thesis, The Johns Hopkins University, 1995.
-
(1995)
-
-
Glenzinski, D.A.1
-
35
-
-
0024034513
-
-
D. Amidei et al., Nucl. Instrum. Methods Phys. Res. A 269, 51, (1988); T. Carroll et al., ibid. 263, 199 (1988); G. W. Foster et al., ibid. 269, 93 (1988).
-
(1988)
Nucl. Instrum. Methods Phys. Res. A
, vol.269
, pp. 51
-
-
Amidei, D.1
-
36
-
-
0022560975
-
-
D. Amidei et al., Nucl. Instrum. Methods Phys. Res. A 269, 51, (1988); T. Carroll et al., ibid. 263, 199 (1988); G. W. Foster et al., ibid. 269, 93 (1988).
-
(1988)
Nucl. Instrum. Methods Phys. Res. A
, vol.263
, pp. 199
-
-
Carroll, T.1
-
37
-
-
0024030444
-
-
D. Amidei et al., Nucl. Instrum. Methods Phys. Res. A 269, 51, (1988); T. Carroll et al., ibid. 263, 199 (1988); G. W. Foster et al., ibid. 269, 93 (1988).
-
(1988)
Nucl. Instrum. Methods Phys. Res. A
, vol.269
, pp. 93
-
-
Foster, G.W.1
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38
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84884348100
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note
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Trigger towers subtend 0.2X15° in η-φ space.
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42
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85104159781
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-
note
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0→ττ→eeνννν, can fake this signature, their contamination rate is less than 1%.
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43
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84884346953
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note
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The strip chamber measures, in the z direction, a shower energy of 52 GeV, to be compared with a 37 GeV measurement from the full calorimeter.
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44
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17144386117
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J. Huston and J. Owens, hep-ph/9508341
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B. Bailey, J. Owens, and J. Ohnemus, Phys. Rev. D 46, 2018 (1992); J. Huston and J. Owens, hep-ph/9508341; M. Drees and T. Han, Phys. Rev. Lett. 77, 4142 (1996).
-
(1992)
Phys. Rev. D
, vol.46
, pp. 2018
-
-
Bailey, B.1
Owens, J.2
Ohnemus, J.3
-
45
-
-
0001648414
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-
B. Bailey, J. Owens, and J. Ohnemus, Phys. Rev. D 46, 2018 (1992); J. Huston and J. Owens, hep-ph/9508341; M. Drees and T. Han, Phys. Rev. Lett. 77, 4142 (1996).
-
(1996)
Phys. Rev. Lett.
, vol.77
, pp. 4142
-
-
Drees, M.1
Han, T.2
-
47
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84884347840
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Ph.D. thesis, Duke University
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S. A. Hauger, Ph.D. thesis, Duke University, 1995.
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(1995)
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Hauger, S.A.1
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48
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84884347009
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(private communication). This calculation was performed using MADGRAPH [27] and PYTHIA [19]
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S. Mrenna (private communication). This calculation was performed using MADGRAPH [27] and PYTHIA [19].
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Mrenna, S.1
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50
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84884347266
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note
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We are using the method 1 SECVTX b-tag estimate. See Ref. [13].
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51
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84884348662
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note
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T candidate event. In that case, for both photons above 12 GeV there are 2 diboson candidates, consistent with an expectation of 0.3±0.1 events, and for both photons above 25 GeV there are no diboson candidates, consistent with an expectation of 0.1 ±0.1 events.
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52
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84884347122
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note
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For example, the event could be due to two pp̄ collisions occurring at the same time, each producing part of the event. Similarly, the event could be the overlap of a pp̄ collision and a cosmic ray interaction. Another possibility is that parts of the event are due to jets which faked the electron and/or photon identification criteria.
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53
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84884349243
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note
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The efficiency for finding a track in the CTC falls rapidly for |η|>1.4. The η for the cluster is η=-1.63. In addition the inner layers of the CTC have high occupancy in the event, making finding any evidence of a track impossible.
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54
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85104160095
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note
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T becomes 72, 83, and 85 GeV for the vertices at -8.9, -33.7, and -38.9 cm, respectively, making each far less likely.
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-
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55
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85104160589
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note
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T>1.0.
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56
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84884346683
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note
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Since most electrons and photons do not deposit energy in the hadronic calorimeters this method is not efficient for finding timing information. It is thus not unusual that one of the three central clusters in the event does not have timing information.
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57
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85104159823
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note
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2, respectively.
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58
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84884346984
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note
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This is not strictly true. The identification of electrons in the plug calorimeter in the top-quark dilepton analysis requires the presence of a track in the CTC. However, since the cluster in the event is in a region of the detector where the track finding efficiency is approximately zero, this requirement is removed.
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59
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0010096434
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Rome, Italy, 1996 Istituto Naz. Fis. Nucl., Frascati
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Q. Fan and A. Bodek, in Proceedings of VIth International Conference on Calorimetry in High Energy Physics, Rome, Italy, 1996 (Istituto Naz. Fis. Nucl., Frascati, 1996), p. 553.
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(1996)
Proceedings of VIth International Conference on Calorimetry in High Energy Physics
, pp. 553
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Fan, Q.1
Bodek, A.2
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60
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84884346543
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note
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T electron CTC track is a perfectly good 3-cluster stub with the appropriate Δφ. It is not selected because the algorithm selects 4-cluster stubs over 3-cluster stubs. There are no other such stubs found for the plug electromagnetic cluster.
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61
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84884347240
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note
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The measurement of the shower in the electromagnetic calorimeter would also be unusual for an electron. However, a detailed study indicates that the problem is not significant and may be due to noise in the calorimeter.
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62
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84884346821
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note
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The amount of energy deposited in each layer of the SVX is given by a Landau distribution. The probability of the amount of energy deposited to be below the requirement to create a cluster is less than 1%.
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-
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63
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84884347245
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note
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The photon sample was selected as "photons" having no nearby tracks (see Table I); the efficiency of these criteria is estimated to be 95.3%. Assuming all of the photons rejected from the sample have a VTX occupancy of greater than 50% and |Δφ|>0.03 rad, the true rate at which photons pass these cuts could be as large as 15% and 7% respectively.
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65
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0027642505
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S. Jadach et al., computer code TAUOLA version 2.5, 1994; also see S. Jadach et al., Comput. Phys. Commun. 76, 361 (1993) and references therein.
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(1993)
Comput. Phys. Commun.
, vol.76
, pp. 361
-
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Jadach, S.1
-
66
-
-
85027538322
-
-
Particle Data Group, R. M. Barnett et al., Phys. Rev. D 54, 1 (1996).
-
(1996)
Phys. Rev. D
, vol.54
, pp. 1
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Barnett, R.M.1
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67
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note
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We have considered here only standard model interpretations. There are exotic possibilities such as a new particle that decays to γ+τ that are consistent with all the data.
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68
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note
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The list of electron requirements does not include the SVX Δφ cut since it is not part of the standard selection criteria. The CTC track requirement is removed since it restricts the η range in which electrons can be found. Removing these requirements is conservative as it only increases the rate at which standard model processes could produce the event.
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-
-
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69
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84884347826
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(private communication). This calculation was performed using MADGRAPH [27] and PYTHIA [19]. Also see Ref. [3(b)]. Based on experience with Diboson production there is about a 30% uncertainty on the WWγγ cross section because of higher order corrections and structure function uncertainties
-
S. Mrenna (private communication). This calculation was performed using MADGRAPH [27] and PYTHIA [19]. Also see Ref. [3(b)]. Based on experience with Diboson production there is about a 30% uncertainty on the WWγγ cross section because of higher order corrections and structure function uncertainties.
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Mrenna, S.1
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70
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85104159968
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note
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1)→W(γG̃)W(γG̃).
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71
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17544377881
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St. Croix, hep-ph/9612229 or M. Carena, R. Culbertson, S. Eno, H. Frisch, and S. Mrenna, hep-ex/9712022
-
For an excellent introduction to supersymmetry see S. Dawson, Proceedings of Techniques and Concepts of High-Energy Physics IX, St. Croix, 1996, pp. 33, hep-ph/9612229 or M. Carena, R. Culbertson, S. Eno, H. Frisch, and S. Mrenna, hep-ex/9712022.
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(1996)
Proceedings of Techniques and Concepts of High-Energy Physics IX
, pp. 33
-
-
Dawson, S.1
-
72
-
-
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-
private communication
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C. Kolda (private communication).
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Kolda, C.1
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73
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0031141534
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We have used PYTHIA 5.710 and SPYTHIA 2.08
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S. Mrenna, Comput. Phys. Commun. 101, 232 (1997). We have used PYTHIA 5.710 and SPYTHIA 2.08.
-
(1997)
Comput. Phys. Commun.
, vol.101
, pp. 232
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Mrenna, S.1
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74
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note
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L production, and the t̃ is not light.
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-
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75
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-
0345829516
-
-
ALEPH Collaboration, R. Barate et al., Phys. Lett. B 420, 127 (1997); 429, 201 (1998); DELPHI Collaboration, P. Abreu et al., Eur. Phys. J. C 1, 1 (1998); L3 Collaboration, M. Acciarri et al., Phys. Lett. B 415, 299 (1997); OPAL Collaboration, K. Ackerstaff et al., Eur. Phys. J. C 2, 607 (1998).
-
(1997)
Phys. Lett. B
, vol.420
, pp. 127
-
-
Barate, R.1
-
76
-
-
0345869842
-
-
ALEPH Collaboration, R. Barate et al., Phys. Lett. B 420, 127 (1997); 429, 201 (1998); DELPHI Collaboration, P. Abreu et al., Eur. Phys. J. C 1, 1 (1998); L3 Collaboration, M. Acciarri et al., Phys. Lett. B 415, 299 (1997); OPAL Collaboration, K. Ackerstaff et al., Eur. Phys. J. C 2, 607 (1998).
-
(1998)
Phys. Lett. B
, vol.429
, pp. 201
-
-
-
77
-
-
0006556017
-
-
ALEPH Collaboration, R. Barate et al., Phys. Lett. B 420, 127 (1997); 429, 201 (1998); DELPHI Collaboration, P. Abreu et al., Eur. Phys. J. C 1, 1 (1998); L3 Collaboration, M. Acciarri et al., Phys. Lett. B 415, 299 (1997); OPAL Collaboration, K. Ackerstaff et al., Eur. Phys. J. C 2, 607 (1998).
-
(1998)
Eur. Phys. J. C
, vol.1
, pp. 1
-
-
Abreu, P.1
-
78
-
-
0042131912
-
-
ALEPH Collaboration, R. Barate et al., Phys. Lett. B 420, 127 (1997); 429, 201 (1998); DELPHI Collaboration, P. Abreu et al., Eur. Phys. J. C 1, 1 (1998); L3 Collaboration, M. Acciarri et al., Phys. Lett. B 415, 299 (1997); OPAL Collaboration, K. Ackerstaff et al., Eur. Phys. J. C 2, 607 (1998).
-
(1997)
Phys. Lett. B
, vol.415
, pp. 299
-
-
Acciarri, M.1
-
79
-
-
0000932336
-
-
ALEPH Collaboration, R. Barate et al., Phys. Lett. B 420, 127 (1997); 429, 201 (1998); DELPHI Collaboration, P. Abreu et al., Eur. Phys. J. C 1, 1 (1998); L3 Collaboration, M. Acciarri et al., Phys. Lett. B 415, 299 (1997); OPAL Collaboration, K. Ackerstaff et al., Eur. Phys. J. C 2, 607 (1998).
-
(1998)
Eur. Phys. J. C
, vol.2
, pp. 607
-
-
Ackerstaff, K.1
-
80
-
-
0346333366
-
-
ALEPH Collaboration, R. Barate et al., Phys. Lett. B 433, 176 (1998); OPAL Collaboration, K. Ackerstaff et al., Eur. Phys. J. C 1, 31 (1998).
-
(1998)
Phys. Lett. B
, vol.433
, pp. 176
-
-
Barate, R.1
-
81
-
-
0002515898
-
-
ALEPH Collaboration, R. Barate et al., Phys. Lett. B 433, 176 (1998); OPAL Collaboration, K. Ackerstaff et al., Eur. Phys. J. C 1, 31 (1998).
-
(1998)
Eur. Phys. J. C
, vol.1
, pp. 31
-
-
Ackerstaff, K.1
-
82
-
-
4243944531
-
-
DØ Collaboration, S. Abachi et al., Phys. Rev. Lett. 78, 2070 (1997); DØ Collaboration, B. Abbott et al., ibid. 80, 442 (1998).
-
(1997)
Phys. Rev. Lett.
, vol.78
, pp. 2070
-
-
Abachi, S.1
-
83
-
-
85030591915
-
-
DØ Collaboration, S. Abachi et al., Phys. Rev. Lett. 78, 2070 (1997); DØ Collaboration, B. Abbott et al., ibid. 80, 442 (1998).
-
(1998)
Phys. Rev. Lett.
, vol.80
, pp. 442
-
-
Abbott, B.1
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