Determination of the strong coupling constant αs(mZ) in next-to-next-to-leading order QCD using H1 jet cross section measurements

Andreev, V.; Baghdasaryan, A.; Begzsuren, K.; Belousov, A.; Bertone, V.; Bolz, A.; Boudry, V.; Brandt, G.; Brisson, V.; Britzger, D.; Buniatyan, A.; Bylinkin, A.; Bystritskaya, L.; Campbell, A.J.; Cantun Avila, K.B.; Cerny, K.; Chekelian, V.; Contreras, J.G.; Cvach, J.; Currie, J.; Dainton, J.B.; Daum, K.; Diaconu, C.; Dobre, M.; Dodonov, V.; Eckerlin, G.; Egli, S.; Elsen, E.; Favart, L.; Fedotov, A.; Feltesse, J.; Fleischer, M.; Fomenko, A.; Gabathuler, E.; Gayler, J.; Gehrmann, T.; Ghazaryan, S.; Goerlich, L.; Gogitidze, N.; Gouzevitch, M.; Grab, C.; Grebenyuk, A.; Greenshaw, T.; Grindhammer, G.; Gwenlan, C.; Haidt, D.; Henderson, R.C.W.; Hladkỳ, J.; Hoffmann, D.; Horisberger, R.; Hreus, T.; Huber, F.; Huss, A.; Jacquet, M.; Janssen, X.; Jung, A.W.; Jung, H.; Kapichine, M.; Katzy, J.; Kiesling, C.; Klein, M.; Kleinwort, C.; Kogler, R.; Kostka, P.; Kretzschmar, J.; Krücker, D.; Krüger, K.; Landon, M.P.J.; Lange, W.; Laycock, P.; Lebedev, A.; Levonian, S.; Lipka, K.; List, B.; List, J.; Lobodzinski, B.; Malinovski, E.; Martyn, H.-U.; Maxfield, S.J.; Mehta, A.; Meyer, A.B.; Meyer, H.; Meyer, J.; Mikocki, S.; Morozov, A.; Müller, K.; Naumann, Th; Newman, P.R.; Niebuhr, C.; Niehues, J.; Nowak, G.; Olsson, J.E.; Ozerov, D.; Pascaud, C.; Patel, G.D.; Perez, E.; Petrukhin, A.; Picuric, I.; Pirumov, H.; Pitzl, D.; Plačakytė, R.; Polifka, R.; Rabbertz, K.; Radescu, V.; Raicevic, N.; Ravdandorj, T.; Reimer, P.; Rizvi, E.; Robmann, P.; Roosen, R.; Rostovtsev, A.; Rotaru, M.; Šálek, D.; Sankey, D.P.C.; Sauter, M.; Sauvan, E.; Schmitt, S.; Schoeffel, L.; Schöning, A.; Sefkow, F.; Shushkevich, S.; Soloviev, Y.; Sopicki, P.; South, D.; Spaskov, V.; Specka, A.; Steder, M.; Stella, B.; Straumann, U.; Sutton, M.R.; Sykora, T.; Thompson, P.D.; Traynor, D.; Truöl, P.; Tsakov, I.; Tseepeldorj, B.; Valkárová, A.; Vallée, C.; Van Mechelen, P.; Vazdik, Y.; Wegener, D.; Wünsch, E.; Žáček, J.; Zhang, Z.; Žlebčík, R.; Zohrabyan, H.; Zomer, F.

doi:10.1140/epjc/s10052-017-5314-7

Determination of the strong coupling constant αs(mZ) in next-to-next-to-leading order QCD using H1 jet cross section measurements

Andreev, V.; Baghdasaryan, A.; Begzsuren, K.; Belousov, A.; Bertone, V.; Bolz, A.; Boudry, V.; Brandt, G.; Brisson, V.; Britzger, D.; Buniatyan, A.; Bylinkin, A.; Bystritskaya, L.; Campbell, A.J.; Cantun Avila, K.B.; Cerny, K.; Chekelian, V.; Contreras, J.G.; Cvach, J.; Currie, J.; Dainton, J.B.; Daum, K.; Diaconu, C.; Dobre, M.; Dodonov, V.; Eckerlin, G.; Egli, S.; Elsen, E.; Favart, L.; Fedotov, A.; Feltesse, J.; Fleischer, M.; Fomenko, A.; Gabathuler, E.; Gayler, J.; Gehrmann, T.; Ghazaryan, S.; Goerlich, L.; Gogitidze, N.; Gouzevitch, M.; Grab, C.; Grebenyuk, A.; Greenshaw, T.; Grindhammer, G.; Gwenlan, C.; Haidt, D.; Henderson, R.C.W.; Hladkỳ, J.; Hoffmann, D.; Horisberger, R.; Hreus, T.; Huber, F.; Huss, A.; Jacquet, M.; Janssen, X.; Jung, A.W.; Jung, H.; Kapichine, M.; Katzy, J.; Kiesling, C.; Klein, M.; Kleinwort, C.; Kogler, R.; Kostka, P.; Kretzschmar, J.; Krücker, D.; Krüger, K.; Landon, M.P.J.; Lange, W.; Laycock, P.; Lebedev, A.; Levonian, S.; Lipka, K.; List, B.; List, J....

Authors

V. Andreev

A. Baghdasaryan

K. Begzsuren

A. Belousov

V. Bertone

A. Bolz

V. Boudry

G. Brandt

V. Brisson

D. Britzger

A. Buniatyan

A. Bylinkin

L. Bystritskaya

A.J. Campbell

K.B. Cantun Avila

K. Cerny

V. Chekelian

J.G. Contreras

J. Cvach

J. Currie

J.B. Dainton

K. Daum

C. Diaconu

M. Dobre

V. Dodonov

G. Eckerlin

S. Egli

E. Elsen

L. Favart

A. Fedotov

J. Feltesse

M. Fleischer

A. Fomenko

E. Gabathuler

J. Gayler

T. Gehrmann

S. Ghazaryan

L. Goerlich

N. Gogitidze

M. Gouzevitch

C. Grab

A. Grebenyuk

T. Greenshaw

G. Grindhammer

C. Gwenlan

D. Haidt

R.C.W. Henderson

J. Hladkỳ

D. Hoffmann

R. Horisberger

T. Hreus

F. Huber

A. Huss

M. Jacquet

X. Janssen

A.W. Jung

H. Jung

M. Kapichine

J. Katzy

C. Kiesling

M. Klein

C. Kleinwort

R. Kogler

P. Kostka

J. Kretzschmar

D. Krücker

K. Krüger

M.P.J. Landon

W. Lange

P. Laycock

A. Lebedev

S. Levonian

K. Lipka

B. List

J. List

B. Lobodzinski

E. Malinovski

H.-U. Martyn

S.J. Maxfield

A. Mehta

A.B. Meyer

H. Meyer

J. Meyer

S. Mikocki

A. Morozov

K. Müller

Th Naumann

P.R. Newman

C. Niebuhr

J. Niehues

G. Nowak

J.E. Olsson

D. Ozerov

C. Pascaud

G.D. Patel

E. Perez

A. Petrukhin

I. Picuric

H. Pirumov

D. Pitzl

R. Plačakytė

R. Polifka

K. Rabbertz

V. Radescu

N. Raicevic

T. Ravdandorj

P. Reimer

E. Rizvi

P. Robmann

R. Roosen

A. Rostovtsev

M. Rotaru

D. Šálek

D.P.C. Sankey

M. Sauter

E. Sauvan

S. Schmitt

L. Schoeffel

A. Schöning

F. Sefkow

S. Shushkevich

Y. Soloviev

P. Sopicki

D. South

V. Spaskov

A. Specka

M. Steder

B. Stella

U. Straumann

M.R. Sutton

T. Sykora

P.D. Thompson

D. Traynor

P. Truöl

I. Tsakov

B. Tseepeldorj

A. Valkárová

C. Vallée

P. Van Mechelen

Y. Vazdik

D. Wegener

E. Wünsch

J. Žáček

Z. Zhang

R. Žlebčík

H. Zohrabyan

F. Zomer

Abstract

The strong coupling constant αsαs is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic ep scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NNLO) QCD predictions. The dependence of the NNLO predictions and of the resulting value of αs(mZ)αs(mZ) at the Z-boson mass mZmZ are studied as a function of the choice of the renormalisation and factorisation scales. Using inclusive jet and dijet data together, the strong coupling constant is determined to be αs(mZ)=0.1157(20)exp(29)thαs(mZ)=0.1157(20)exp(29)th . Complementary, αs(mZ)αs(mZ) is determined together with parton distribution functions of the proton (PDFs) from jet and inclusive DIS data measured by the H1 experiment. The value αs(mZ)=0.1142(28)totαs(mZ)=0.1142(28)tot obtained is consistent with the determination from jet data alone. The impact of the jet data on the PDFs is studied. The running of the strong coupling is tested at different values of the renormalisation scale and the results are found to be in agreement with expectations.

Citation

Andreev, V., Baghdasaryan, A., Begzsuren, K., Belousov, A., Bertone, V., Bolz, A., …Zomer, F. (2017). Determination of the strong coupling constant αs(mZ) in next-to-next-to-leading order QCD using H1 jet cross section measurements. The European Physical Journal C, 77(11), Article 791. https://doi.org/10.1140/epjc/s10052-017-5314-7

Journal Article Type	Article
Acceptance Date	Oct 12, 2017
Online Publication Date	Nov 22, 2017
Publication Date	Nov 22, 2017
Deposit Date	Dec 13, 2017
Publicly Available Date	Dec 13, 2017
Journal	European Physical Journal C: Particles and Fields
Print ISSN	1434-6044
Electronic ISSN	1434-6052
Publisher	SpringerOpen
Peer Reviewed	Peer Reviewed
Volume	77
Issue	11
Article Number	791
DOI	https://doi.org/10.1140/epjc/s10052-017-5314-7