Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te
Abstract A search for the pair production of heavy vector-like partners $$\mathrm {T}$$ T...
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| Awduron Eraill: | |
| Fformat: | Erthygl |
| Iaith: | English |
| Cyhoeddwyd: |
Springer Berlin Heidelberg
2021
|
| Mynediad Ar-lein: | https://hdl.handle.net/1721.1/131623 |
| _version_ | 1826202829544488960 |
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| author | Sirunyan, A. M Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Dragicevic, M. Erö, J. Del Valle, A. E Flechl, M. Frühwirth, R. Ghete, V. M Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Sirunyan, A. M Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Dragicevic, M. Erö, J. Del Valle, A. E Flechl, M. Frühwirth, R. Ghete, V. M Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. |
| author_sort | Sirunyan, A. M |
| collection | MIT |
| description | Abstract
A search for the pair production of heavy vector-like partners
$$\mathrm {T}$$
T
and
$$\mathrm {B}$$
B
of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton–proton collisions at
$$\sqrt{s} = 13\,\text {Te}\text {V} $$
s
=
13
Te
. The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9
$$\,\text {fb}^{-1}$$
fb
-
1
. Final states studied for
$$\mathrm {T} \overline{\mathrm {T}} $$
T
T
¯
production include those where one of the
$$\mathrm {T}$$
T
quarks decays via
$$\mathrm {T} \rightarrow \mathrm {t}\mathrm {Z}$$
T
→
t
Z
and the other via
$$\mathrm {T} \rightarrow \mathrm {b}\mathrm {W}$$
T
→
b
W
,
$$\mathrm {t}\mathrm {Z}$$
t
Z
, or
$$\mathrm {t}\mathrm {H} $$
t
H
, where
$$\mathrm {H}$$
H
is a Higgs boson. For the
$$\mathrm {B} \overline{\mathrm {B}} $$
B
B
¯
case, final states include those where one of the
$$\mathrm {B}$$
B
quarks decays via
$$\mathrm {B} \rightarrow \mathrm {b}\mathrm {Z}$$
B
→
b
Z
and the other
$$\mathrm {B} \rightarrow \mathrm {t}\mathrm {W}$$
B
→
t
W
,
$$\mathrm {b}\mathrm {Z}$$
b
Z
, or
$$\mathrm {b}\mathrm {H} $$
b
H
. Events with two oppositely charged electrons or muons, consistent with coming from the decay of a
$$\mathrm {Z}$$
Z
boson, and jets are investigated. The number of observed events is consistent with standard model background estimations. Lower limits at 95% confidence level are placed on the masses of the
$$\mathrm {T}$$
T
and
$$\mathrm {B}$$
B
quarks for a range of branching fractions. Assuming 100% branching fractions for
$$\mathrm {T} \rightarrow \mathrm {t}\mathrm {Z}$$
T
→
t
Z
, and
$$\mathrm {B} \rightarrow \mathrm {b}\mathrm {Z}$$
B
→
b
Z
,
$$\mathrm {T}$$
T
and
$$\mathrm {B}$$
B
quark mass values below 1280 and 1130
$$\,\text {Ge}\text {V}$$
Ge
, respectively, are excluded. |
| first_indexed | 2024-09-23T12:20:40Z |
| format | Article |
| id | mit-1721.1/131623 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:20:40Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1316232023-12-22T19:29:58Z Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te Sirunyan, A. M Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Dragicevic, M. Erö, J. Del Valle, A. E Flechl, M. Frühwirth, R. Ghete, V. M Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Massachusetts Institute of Technology. Department of Physics Abstract A search for the pair production of heavy vector-like partners $$\mathrm {T}$$ T and $$\mathrm {B}$$ B of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te . The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9 $$\,\text {fb}^{-1}$$ fb - 1 . Final states studied for $$\mathrm {T} \overline{\mathrm {T}} $$ T T ¯ production include those where one of the $$\mathrm {T}$$ T quarks decays via $$\mathrm {T} \rightarrow \mathrm {t}\mathrm {Z}$$ T → t Z and the other via $$\mathrm {T} \rightarrow \mathrm {b}\mathrm {W}$$ T → b W , $$\mathrm {t}\mathrm {Z}$$ t Z , or $$\mathrm {t}\mathrm {H} $$ t H , where $$\mathrm {H}$$ H is a Higgs boson. For the $$\mathrm {B} \overline{\mathrm {B}} $$ B B ¯ case, final states include those where one of the $$\mathrm {B}$$ B quarks decays via $$\mathrm {B} \rightarrow \mathrm {b}\mathrm {Z}$$ B → b Z and the other $$\mathrm {B} \rightarrow \mathrm {t}\mathrm {W}$$ B → t W , $$\mathrm {b}\mathrm {Z}$$ b Z , or $$\mathrm {b}\mathrm {H} $$ b H . Events with two oppositely charged electrons or muons, consistent with coming from the decay of a $$\mathrm {Z}$$ Z boson, and jets are investigated. The number of observed events is consistent with standard model background estimations. Lower limits at 95% confidence level are placed on the masses of the $$\mathrm {T}$$ T and $$\mathrm {B}$$ B quarks for a range of branching fractions. Assuming 100% branching fractions for $$\mathrm {T} \rightarrow \mathrm {t}\mathrm {Z}$$ T → t Z , and $$\mathrm {B} \rightarrow \mathrm {b}\mathrm {Z}$$ B → b Z , $$\mathrm {T}$$ T and $$\mathrm {B}$$ B quark mass values below 1280 and 1130 $$\,\text {Ge}\text {V}$$ Ge , respectively, are excluded. 2021-09-20T17:29:04Z 2021-09-20T17:29:04Z 2019-04-26 2020-06-26T12:36:57Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131623 The European Physical Journal C. 2019 Apr 26;79(4):364 PUBLISHER_CC en https://doi.org/10.1140/epjc/s10052-019-6855-8 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ CERN for the benefit of the CMS collaboration application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Sirunyan, A. M Tumasyan, A. Adam, W. Ambrogi, F. Asilar, E. Bergauer, T. Brandstetter, J. Dragicevic, M. Erö, J. Del Valle, A. E Flechl, M. Frühwirth, R. Ghete, V. M Hrubec, J. Jeitler, M. Krammer, N. Krätschmer, I. Liko, D. Madlener, T. Mikulec, I. Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te |
| title | Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te |
| title_full | Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te |
| title_fullStr | Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te |
| title_full_unstemmed | Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te |
| title_short | Search for vector-like quarks in events with two oppositely charged leptons and jets in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\text {V} $$ s = 13 Te |
| title_sort | search for vector like quarks in events with two oppositely charged leptons and jets in proton proton collisions at sqrt s 13 text te text v s 13 te |
| url | https://hdl.handle.net/1721.1/131623 |
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