@misc{10481/85433,
year = {2023},
month = {8},
url = {https://hdl.handle.net/10481/85433},
abstract = {The production of a 
W
 boson in association with a single charm quark is studied using 
140
 
 
fb
−
1
 of 
√
s
=
13
 
 
TeV
 proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. The charm quark is tagged by the presence of a charmed hadron reconstructed with a secondary-vertex fit. The 
W
 boson is reconstructed from the decay to either an electron or a muon and the missing transverse momentum present in the event. The charmed mesons reconstructed are 
D
+
→
K
−
π
+
π
+
 and 
D
*
+
→
D
0
π
+
→
(
K
−
π
+
)
π
+
 and the charge conjugate decays in the fiducial regions where 
p
T
(
e
,
μ
)
>
30
 
 
GeV
, 
|
η
(
e
,
μ
)
|
<
2.5
, 
p
T
(
D
(
*
)
)
>
8
 
 
GeV
, and 
|
η
(
D
(
*
)
)
|
<
2.2
. The integrated and normalized differential cross sections as a function of the pseudorapidity of the lepton from the 
W
 boson decay, and of the transverse momentum of the charmed hadron, are extracted from the data using a profile likelihood fit. The measured total fiducial cross sections are 
σ
OS
–
SS
fid
(
W
−
+
D
+
)
=
50.2
±
0.2
(
stat
)
+
2.4
−
2.3
(
syst
)
 
 
pb
, 
σ
OS
–
SS
fid
(
W
+
+
D
−
)
=
48.5
±
0.2
(
stat
)
+
2.3
−
2.2
(
syst
)
 
 
pb
, 
σ
OS
–
SS
fid
(
W
−
+
D
*
+
)
=
51.1
±
0.4
(
stat
)
+
1.9
−
1.8
(
syst
)
 
 
pb
, and 
σ
OS
–
SS
fid
(
W
+
+
D
*
−
)
=
50.0
±
0.4
(
stat
)
+
1.9
−
1.8
(
syst
)
 
 
pb
. Results are compared with the predictions of next-to-leading-order quantum chromodynamics calculations performed using state-of-the-art parton distribution functions. Additionally, the ratio of charm to anticharm production cross sections is studied to probe the 
s
−
¯
s
 quark asymmetry. The ratio is found to be 
R
±
c
=
0.971
±
0.006
(
stat
)
±
0.011
(
syst
)
. The ratio and cross-section measurements are consistent with the predictions obtained with parton distribution function sets that have a symmetric 
s
−
¯
s
 sea, indicating that any 
s
−
¯
s
 asymmetry in the Bjorken-
x
 region relevant for this measurement is small.},
organization = {ANPCyT},
organization = {YerevaYerevan Physics Institute (YerPhI), Armenian Physics Institute (YerPhI), Armenia},
organization = {Australian Research Council},
organization = {BMWFW, Austria},
organization = {Austrian Science Fund (FWF)},
organization = {Azerbaijan National Academy of Sciences (ANAS)},
organization = {Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)},
organization = {Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)},
organization = {Natural Sciences and Engineering Research Council of Canada (NSERC)},
organization = {NRC, Canada},
organization = {Canada Foundation for Innovation},
organization = {CERN},
organization = {ANID, Chile},
organization = {Chinese Academy of Sciences},
organization = {Ministry of Science and Technology, China},
organization = {National Natural Science Foundation of China (NSFC)},
organization = {Minciencias, Colombia},
organization = {MEYS CR, Czech Republic},
organization = {National Research Foundation of Korea},
organization = {Danish Natural Science Research Council},
organization = {Centre National de la Recherche Scientifique (CNRS)},
organization = {Institut de recherche sur les lois fondamentales de l'Univers, Direction des Sciences de la Matiere, Commissariat a l'Energie Atomique (CEA-DRF/IRFU), France},
organization = {Shota Rustaveli National Science Foundation of Georgia (SRNSFG), Georgia},
organization = {Federal Ministry of Education & Research (BMBF)},
organization = {HGF, Germany},
organization = {Max Planck Society},
organization = {General Secretariat for Research and Innovation (GSRI), Greece},
organization = {RGC, China},
organization = {Hong Kong SAR, China},
organization = {Israel Science Foundation},
organization = {Benoziyo Center, Israel},
organization = {Istituto Nazionale di Fisica Nucleare (INFN)},
organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)},
organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)
Japan Society for the Promotion of Science},
organization = {CNRST, Morocco},
organization = {Netherlands Organization for Scientific Research (NWO)
Netherlands Government},
organization = {RCN, Norway},
organization = {MEiN, Poland},
organization = {Fundacao para a Ciencia e a Tecnologia (FCT)},
organization = {MNE/IFA, Romania},
organization = {Ministry of Education, Science & Technological Development, Serbia},
organization = {Ministry of Education, Science, Research and Sport (MSSR), Slovakia},
organization = {Slovenian Research Agency - Slovenia},
organization = {DSI/NRF, South Africa},
organization = {Spanish Government},
organization = {Swedish Research Council},
organization = {Wallenberg Foundation, Sweden},
organization = {SERI},
organization = {Swiss National Science Foundation (SNSF)},
organization = {Cantons of Bern},
organization = {Geneva, Switzerland},
organization = {MIZZ, Slovenia},
organization = {Ministry of Science and Technology, Taiwan},
organization = {TENMAK, Tuerkiye},
organization = {UK Research & Innovation (UKRI)
Science & Technology Facilities Council (STFC)},
organization = {United States Department of Energy (DOE)},
organization = {National Science Foundation (NSF)},
organization = {BCKDF},
organization = {CANARIE},
organization = {Compute Canada},
organization = {CRC, Canada},
organization = {RIMUS Research Programme},
organization = {University Research Center, Czech Republic},
organization = {European Cooperation in Science and Technology (COST)},
organization = {European Research Council (ERC)},
organization = {European Union (EU)},
organization = {Horizon 2020},
organization = {European Union (EU)
Marie Curie Actions},
organization = {Agence Nationale de la Recherche (ANR)},
organization = {German Research Foundation (DFG)},
organization = {Alexander von Humboldt Foundation},
organization = {Thales Group},
organization = {European Union (EU)},
organization = {National Strategic Reference Framework (Greek NSRF), Greece},
organization = {BSF-NSF},
organization = {MINERVA Foundation (MINERVA), Israel},
organization = {Norwegian Financial Mechanism 2014-2021, Norway	PRIMUS 21/SCI/017},
organization = {NCN},
organization = {Polish National Agency for Academic Exchange (NAWA)},
organization = {La Caixa Foundation},
organization = {CERCA Programme Generalitat de Catalunya},
organization = {PROMETEO},
organization = {GenT Programmes Generalitat Valenciana (PROMETEO)},
organization = {GenT Programmes Generalitat Valenciana, Spain},
organization = {Goeran Gustafssons Stiftelse, Sweden},
organization = {Royal Society
Leverhulme Trust		
UNCE SCI/013},
publisher = {American Physical Society},
title = {Measurement of the production of a W boson in association with a charmed hadron in pp collisions at ffiffi s p =13 TeV with the ATLAS detector},
doi = {10.1103/PhysRevD.108.032012},
author = {Atlas Collaboration and Aguilar Saavedra, Juan Antonio and Rodríguez Chala, Mikael},
}