Measurement of B anti-B Angular Correlations based on Secondary Vertex Reconstruction at sqrt(s)=7 TeV

Stephanie Beauceron; Freya Blekman; Stijn Blyweert; Jorgen D'Hondt; Olivier Devroede; Rebeca Gonzalez Suarez; Alexis Kalogeropoulos; Joris Maes; Michael Maes; Stefaan Tavernier; Walter Van Doninck; Petra Van Mulders; Gerrit Van Onsem; Ilaria Villella

Measurement of B anti-B Angular Correlations based on Secondary Vertex Reconstruction at sqrt(s)=7 TeV

Stephanie Beauceron, Freya Blekman, Stijn Blyweert, Jorgen D'Hondt, Olivier Devroede, Rebeca Gonzalez Suarez, Alexis Kalogeropoulos, Joris Maes, Michael Maes, Stefaan Tavernier, Walter Van Doninck, Petra Van Mulders, Gerrit Van Onsem, Ilaria Villella

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A measurement of the angular correlations between beauty and anti-beauty hadrons (B B-bar) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation is reconstructed from the decay vertices and the primary-interaction vertex. The differential B B-bar production cross section, measured from a data sample collected by CMS and corresponding to an integrated luminosity of 3.1 inverse picobarns, shows that a sizable fraction of the B B-bar pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of b b-bar production.

Originele taal-2	English
Artikelnummer	136
Pagina's (van-tot)	1-34
Aantal pagina's	35
Tijdschrift	JHEP
Volume	2011
Nummer van het tijdschrift	3
Status	Published - mrt 2011

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Beauceron, Stephanie ; Blekman, Freya ; Blyweert, Stijn ; D'Hondt, Jorgen ; Devroede, Olivier ; Gonzalez Suarez, Rebeca ; Kalogeropoulos, Alexis ; Maes, Joris ; Maes, Michael ; Tavernier, Stefaan ; Van Doninck, Walter ; Van Mulders, Petra ; Van Onsem, Gerrit ; Villella, Ilaria. / Measurement of B anti-B Angular Correlations based on Secondary Vertex Reconstruction at sqrt(s)=7 TeV. In: JHEP. 2011 ; Vol. 2011, Nr. 3. blz. 1-34.

@article{442a57b6719148b1a2c07ad23d47e733,

title = "Measurement of B anti-B Angular Correlations based on Secondary Vertex Reconstruction at sqrt(s)=7 TeV",

abstract = "A measurement of the angular correlations between beauty and anti-beauty hadrons (B B-bar) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation is reconstructed from the decay vertices and the primary-interaction vertex. The differential B B-bar production cross section, measured from a data sample collected by CMS and corresponding to an integrated luminosity of 3.1 inverse picobarns, shows that a sizable fraction of the B B-bar pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of b b-bar production.",

keywords = "B anti-B : angular correlation : measured, bottom : pair production, quantum chromodynamics, CERN LHC Coll, CMS, Hadron-Hadron Scattering",

author = "Stephanie Beauceron and Freya Blekman and Stijn Blyweert and Jorgen D'Hondt and Olivier Devroede and {Gonzalez Suarez}, Rebeca and Alexis Kalogeropoulos and Joris Maes and Michael Maes and Stefaan Tavernier and {Van Doninck}, Walter and {Van Mulders}, Petra and {Van Onsem}, Gerrit and Ilaria Villella",

year = "2011",

month = mar,

language = "English",

volume = "2011",

pages = "1--34",

journal = "The Journal of high energy physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "3",

}

Measurement of B anti-B Angular Correlations based on Secondary Vertex Reconstruction at sqrt(s)=7 TeV. / Beauceron, Stephanie; Blekman, Freya; Blyweert, Stijn; D'Hondt, Jorgen ; Devroede, Olivier; Gonzalez Suarez, Rebeca; Kalogeropoulos, Alexis; Maes, Joris; Maes, Michael; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit; Villella, Ilaria.

In: JHEP, Vol. 2011, Nr. 3, 136, 03.2011, blz. 1-34.

Onderzoeksoutput: Article › peer review

TY - JOUR

T1 - Measurement of B anti-B Angular Correlations based on Secondary Vertex Reconstruction at sqrt(s)=7 TeV

AU - Beauceron, Stephanie

AU - Blekman, Freya

AU - Blyweert, Stijn

AU - D'Hondt, Jorgen

AU - Devroede, Olivier

AU - Gonzalez Suarez, Rebeca

AU - Kalogeropoulos, Alexis

AU - Maes, Joris

AU - Maes, Michael

AU - Tavernier, Stefaan

AU - Van Doninck, Walter

AU - Van Mulders, Petra

AU - Van Onsem, Gerrit

AU - Villella, Ilaria

PY - 2011/3

Y1 - 2011/3

N2 - A measurement of the angular correlations between beauty and anti-beauty hadrons (B B-bar) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation is reconstructed from the decay vertices and the primary-interaction vertex. The differential B B-bar production cross section, measured from a data sample collected by CMS and corresponding to an integrated luminosity of 3.1 inverse picobarns, shows that a sizable fraction of the B B-bar pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of b b-bar production.

AB - A measurement of the angular correlations between beauty and anti-beauty hadrons (B B-bar) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation is reconstructed from the decay vertices and the primary-interaction vertex. The differential B B-bar production cross section, measured from a data sample collected by CMS and corresponding to an integrated luminosity of 3.1 inverse picobarns, shows that a sizable fraction of the B B-bar pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of b b-bar production.

KW - B anti-B : angular correlation : measured

KW - bottom : pair production

KW - quantum chromodynamics

KW - CERN LHC Coll

KW - CMS

KW - Hadron-Hadron Scattering

M3 - Article

VL - 2011

SP - 1

EP - 34

JO - The Journal of high energy physics

JF - The Journal of high energy physics

SN - 1126-6708

IS - 3

M1 - 136

ER -

Measurement of B anti-B Angular Correlations based on Secondary Vertex Reconstruction at sqrt(s)=7 TeV

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