@article{10902/28227,
year = {2013},
month = {4},
url = {https://hdl.handle.net/10902/28227},
abstract = {The underlying event activity in proton-proton collisions at forward pseudo-rapidity (−6.6 < η < −5.2) is studied with the CMS detector at the LHC, using a novel observable: the ratio of the forward energy density, dE/dη, for events with a charged-particle jet produced at central pseudorapidity (|η jet| < 2) to the forward energy density for inclusive events. This forward energy density ratio is measured as a function of the central jet transverse momentum, p T, at three different pp centre-of-mass energies (s√=0.9, 2.76, and 7 TeV). In addition, the s√
 evolution of the forward energy density is studied in inclusive events and in events with a central jet. The results are compared to those of Monte Carlo event generators for pp collisions and are discussed in terms of the underlying event. Whereas the dependence of the forward energy density ratio on jet p T at each s√ separately can be well reproduced by some models, all models fail to simultaneously describe the increase of the forward energy density with s√ in both inclusive events and in events with a central jet.},
organization = {We would like to thank Leif L onnblad for making the dipsy predictions available to the
CMS collaboration.
We congratulate our colleagues in the CERN accelerator departments for the excellent
performance of the LHC and thank the technical and administrative sta s at CERN and at
other CMS institutes for their contributions to the success of the CMS e ort. In addition,
we gratefully acknowledge the computing centres and personnel of the Worldwide LHC
Computing Grid for delivering so e ectively the computing infrastructure essential to our
analyses. Finally, we acknowledge the enduring support for the construction and operation
of the LHC and the CMS detector provided by the following funding agencies: BMWF
and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP
(Brazil); MEYS (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS
(Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia);
Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF,
DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and
DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea);
LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI
(New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia,
Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia);
MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC
(Taipei); ThEPCenter, IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey);
NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received
support from the A.G. Leventis Foundation, the Helmholtz Association, the Russian
Foundation for Basic Research, the Russian Federation Presidential Grants N1456.2008.2,
N4142.2010.2 and N3920.2012.2, the Russian Ministry of Education and Science, and the
Belgian Federal Science Policy O ce.},
publisher = {Springer Verlag},
publisher = {Journal of High Energy Physics, 2013, 2013(4), 72},
title = {Study of the underlying event at forward rapidity in pp collisions at vs = 0.9, 2.76, and 7 TeV},
author = {Chatrchyan, Serguei and Brochero Cifuentes, Javier Andrés and Cabrillo Bartolomé, José Iban and Calderón Tazón, Alicia and Chuang, S. H. and Duarte Campderros, Jorge and Felcini, Marta and Fernández García, Marcos and Gómez Gramuglio, Gervasio and González Sánchez, Francisco Javier and Graziano, Alberto and Jordá Lope, Clara and López Virto, María Amparo and Marco de Lucas, Jesús and Marco de Lucas, Rafael José and Martínez Rivero, Celso and Matorras Weinig, Francisco and Muñoz Sánchez, Francisca Javiela and Rodrigo Anoro, Teresa and Rodríguez Marrero, Ana Yaiza and Ruiz Jimeno, Alberto and Scodellaro, Luca and Vila Álvarez, Iván  and Vilar Cortabitarte, Rocío},
}