Measurement of the fraction of \Y1S originating from \chib1P decays in $pp$ collisions at $\sqrt{s} = 7\tev$
R. Aaij
,
S. Barsuk
(1)
,
O. Callot
(1)
,
J. He
(1)
,
B. Jean-Marie
(1)
,
J. Lefrançois
(1)
,
F. Machefert
(1)
,
A. Martin Sanchez
(1)
,
M. Nicol
(1)
,
P. Robbe
(1)
,
M.-H. Schune
(1)
,
B. Viaud
(1)
,
I. Videau
(1)
,
E. Ben-Haim
(2)
,
M. Benayoun
(2)
,
P. David
(2)
,
L. del Buono
(2)
,
A. Martens
(2)
,
I. de Bonis
(3)
,
D. Decamp
(3)
,
Ph. Ghez
(3)
,
P. Hopchev
(3)
,
J.-P. Lees
(3)
,
I.V. Machikhiliyan
(3)
,
M.-N. Minard
(3)
,
B. Pietrzyk
(3)
,
S. t'Jampens
(3)
,
V. Tisserand
(3)
,
E. Tournefier
(3)
,
C. Adrover
(4)
,
E. Aslanides
(4)
,
J. Cogan
(4)
,
B. Khanji
(4)
,
R. Le Gac
(4)
,
O. Leroy
(4)
,
G. Mancinelli
(4)
,
E. Maurice
(4)
,
M. Perrin-Terrin
(4)
,
M. Sapunov
(4)
,
J. Serrano
(4)
,
A. Tsaregorodtsev
(4)
,
Ziad Zj Ajaltouni
(5)
,
E. Cogneras
(5)
,
O. Deschamps
(5)
,
I. El Rifai
(5)
,
Pierre Henrard
(5)
,
M. Hoballah
(5)
,
Marwa Jahjah-Hussein
(5)
,
R. Lefèvre
(5)
,
L. Li Gioi
(5)
,
S. Monteil
(5)
,
V. Niess
(5)
,
Pascal Perret
(5)
,
Diego Alejandro Roa Romero
(5)
,
Krzysztof Grzegorz Sobczak
(5)
R. Aaij
- Function : Author
J. He
- Function : Author
- PersonId : 756138
- ORCID : 0000-0001-8179-417X
L. del Buono
- Function : Author
- PersonId : 742055
- IdHAL : luigi-del-buono
- ORCID : 0000-0003-4774-2194
- IdRef : 253135834
A. Martens
- Function : Author
- PersonId : 738690
- IdHAL : aurelien-martens
S. t'Jampens
- Function : Author
- PersonId : 736045
- IdHAL : stephane-tjampens
- ORCID : 0000-0003-4249-6641
J. Cogan
- Function : Author
- PersonId : 750510
- IdHAL : julien-cogan
- ORCID : 0000-0001-7194-7566
- IdRef : 078779014
O. Leroy
- Function : Author
- PersonId : 171866
- IdHAL : olivier-leroy
- ORCID : 0000-0002-2589-240X
- IdRef : 169871835
M. Perrin-Terrin
- Function : Author
- PersonId : 741779
- IdHAL : perrin-terrin
- ORCID : 0000-0002-3568-1956
- IdRef : 179269666
J. Serrano
- Function : Author
- PersonId : 175327
- IdHAL : justine-serrano
- ORCID : 0000-0003-2489-7812
- IdRef : 127525521
Ziad Zj Ajaltouni
- Function : Author
- PersonId : 903794
E. Cogneras
- Function : Author
- PersonId : 743220
- IdHAL : eric-cogneras
- ORCID : 0000-0002-8933-9427
O. Deschamps
- Function : Author
- PersonId : 12089
- IdHAL : olivier-deschamps
- ORCID : 0000-0002-7047-6042
- IdRef : 161447368
Pierre Henrard
- Function : Author
- PersonId : 829303
M. Hoballah
- Function : Author
- PersonId : 1174785
- IdHAL : mostafa-adam-hoballah-hobart
- ORCID : 0000-0002-9018-1639
Pascal Perret
- Function : Author
- PersonId : 739797
- IdHAL : pascal-perret
- ORCID : 0000-0002-5732-4343
Diego Alejandro Roa Romero
- Function : Author
- PersonId : 769524
- IdRef : 172096839
Abstract
The production of \chib1P mesons in $pp$ collisions at a centre-of-mass energy of $7\tev$ is studied using $32\invpb$ of data collected with the \lhcb detector. The $\chib1P$ mesons are reconstructed in the decay mode $\chib1P \to \Y1S\g \to \mumu\g$. The fraction of \Y1S originating from \chib1P decays in the \Y1S transverse momentum range $6 < \pt^{\Y1S} < 15\gevc$ and rapidity range $2.0 < y^{\Y1S} < 4.5$ is measured to be $(20.7\pm 5.7\pm 2.1^{+2.7}_{-5.4})%$, where the first uncertainty is statistical, the second is systematic and the last gives the range of the result due to the unknown \Y1S and \chib1P polarizations.