Measurement of multijet production in $${e\!\!\;p}$$ e p collisions at high $$\varvec{Q^2}$$ Q 2 and determination of the strong coupling $$\varvec{{\alpha _s}} $$ α s

V. Andreev,H1 collaboration,A. Baghdasaryan,K. Begzsuren,A. Belousov,P. Belov,V. Boudry,G. Brandt,M. Brinkmann,V. Brisson,D. Britzger,A. Buniatyan,A. Bylinkin,L. Bystritskaya,A. J. Campbell,K. B. Cantun Avila,F. Ceccopieri,Karel Černý,V. Chekelian,J. G. Contreras,J. B. Dainton,K. Daum,Cristinel Diaconu,M. Dobre,V. Dodonov,A. Dossanov,G. Eckerlin,S. Egli,E. Elsen,L. Favart,A. Fedotov,J. Feltesse,J. Ferencei,M. Fleischer,Alexander Fomenko,E. Gabathuler,J. Gayler,S. Ghazaryan,A. Glazov,Lidia Goerlich,N. Gogitidze,M. Gouzevitch,C. Grab,A. Grebenyuk,T. Greenshaw,G. Grindhammer,D. Haidt,R. C. W. Henderson,M. Herbst,J. Hladkỳ,D. Hoffmann,R. Horisberger,T. Hreus,F. Huber,M. Jacquet,Xavier Janssen,Hannes Jung,M. Kapichine,C. Kiesling,M. Klein,C. Kleinwort,Roman Kogler,P. Kostka,Jan Kretzschmar,K. Krüger,Murrough Landon,W. Lange,Paul 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,G. Nowak,J. E. Olsson,D. Ozerov,P. Pahl,C. Pascaud,G. D. Patel,E. Perez,A. Petrukhin,I. Picuric,H. Pirumov,D. Pitzl,R. Plačakytė,B. Pokorny,R. Polifka,V. Radescu,N. Raicevic,T. Ravdandorj,P. Reimer,Eram Rizvi,P. Robmann,R. Roosen,A. Rostovtsev,Marina Rotaru,S. Rusakov,D. Šálek,David Sankey,M. Sauter,Emmanuel Sauvan,Stefan Schmitt,Laurent Schoeffel,A. Schöning,Hans-Christian Schultz-Coulon,F. Sefkow,S. Shushkevich,Yury Soloviev,Paweł Sopicki,D. South,V. Spaskov,A. Specka,M. Steder,B. Stella,U. Straumann,Tomáš Sýkora,Paul Thompson,D. Traynor,P. Truöl,I. Tsakov,B. Tseepeldorj,J. Turnau,Alice Valkárová,C. Vallée,P. Van Mechelen,Y. Vazdik,D. Wegener,E. Wünsch,Josef Zacek,Z. Zhang,R. Žlebčík,H. Zohrabyan,F. Zomer; V. Andreev; H1 collaboration; A. Baghdasaryan; K. Begzsuren; A. Belousov; P. Belov; V. Boudry; G. Brandt; M. Brinkmann; V. Brisson; D. Britzger; A. Buniatyan; A. Bylinkin; L. Bystritskaya; A. J. Campbell; K. B. Cantun Avila; F. Ceccopieri; Karel Černý; V. Chekelian; J. G. Contreras; J. B. Dainton; K. Daum; Cristinel Diaconu; M. Dobre; V. Dodonov; A. Dossanov; G. Eckerlin; S. Egli; E. Elsen; L. Favart; A. Fedotov; J. Feltesse; J. Ferencei; M. Fleischer; Alexander Fomenko; E. Gabathuler; J. Gayler; S. Ghazaryan; A. Glazov; Lidia Goerlich; N. Gogitidze; M. Gouzevitch; C. Grab; A. Grebenyuk; T. Greenshaw; G. Grindhammer; D. Haidt; R. C. W. Henderson; M. Herbst; J. Hladkỳ; D. Hoffmann; R. Horisberger; T. Hreus; F. Huber; M. Jacquet; Xavier Janssen; Hannes Jung; M. Kapichine; C. Kiesling; M. Klein; C. Kleinwort; Roman Kogler; P. Kostka; Jan Kretzschmar; K. Krüger; Murrough Landon; W. Lange; Paul 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; G. Nowak; J. E. Olsson; D. Ozerov; P. Pahl; C. Pascaud; G. D. Patel; E. Perez; A. Petrukhin; I. Picuric; H. Pirumov; D. Pitzl; R. Plačakytė; B. Pokorny; R. Polifka; V. Radescu; N. Raicevic; T. Ravdandorj; P. Reimer; Eram Rizvi; P. Robmann; R. Roosen; A. Rostovtsev; Marina Rotaru; S. Rusakov; D. Šálek; David Sankey; M. Sauter; Emmanuel Sauvan; Stefan Schmitt; Laurent Schoeffel; A. Schöning; Hans-Christian Schultz-Coulon; F. Sefkow; S. Shushkevich; Yury Soloviev; Paweł Sopicki; D. South; V. Spaskov; A. Specka; M. Steder; B. Stella; U. Straumann; Tomáš Sýkora; Paul Thompson; D. Traynor; P. Truöl; I. Tsakov; B. Tseepeldorj; J. Turnau; Alice Valkárová; C. Vallée; P. Van Mechelen; Y. Vazdik; D. Wegener; E. Wünsch; Josef Zacek; Z. Zhang; R. Žlebčík; H. Zohrabyan; F. Zomer

Measurement of multijet production in $${e\!\!\;p}$$ e p collisions at high $$\varvec{Q^2}$$ Q 2 and determination of the strong coupling $$\varvec{{\alpha _s}} $$ α s

V. Andreev,H1 collaboration,A. Baghdasaryan,K. Begzsuren,A. Belousov,P. Belov,V. Boudry,G. Brandt,M. Brinkmann,V. Brisson,D. Britzger,A. Buniatyan,A. Bylinkin,L. Bystritskaya,A. J. Campbell,K. B. Cantun Avila,F. Ceccopieri,Karel Černý,V. Chekelian,J. G. Contreras,J. B. Dainton,K. Daum,Cristinel Diaconu,M. Dobre,V. Dodonov,A. Dossanov,G. Eckerlin,S. Egli,E. Elsen,L. Favart,A. Fedotov,J. Feltesse,J. Ferencei,M. Fleischer,Alexander Fomenko,E. Gabathuler,J. Gayler,S. Ghazaryan,A. Glazov,Lidia Goerlich,N. Gogitidze,M. Gouzevitch,C. Grab,A. Grebenyuk,T. Greenshaw,G. Grindhammer,D. Haidt,R. C. W. Henderson,M. Herbst,J. Hladkỳ,D. Hoffmann,R. Horisberger,T. Hreus,F. Huber,M. Jacquet,Xavier Janssen,Hannes Jung,M. Kapichine,C. Kiesling,M. Klein,C. Kleinwort,Roman Kogler,P. Kostka,Jan Kretzschmar,K. Krüger,Murrough Landon,W. Lange,Paul 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,G. Nowak,J. E. Olsson,D. Ozerov,P. Pahl,C. Pascaud,G. D. Patel,E. Perez,A. Petrukhin,I. Picuric,H. Pirumov,D. Pitzl,R. Plačakytė,B. Pokorny,R. Polifka,V. Radescu,N. Raicevic,T. Ravdandorj,P. Reimer,Eram Rizvi,P. Robmann,R. Roosen,A. Rostovtsev,Marina Rotaru,S. Rusakov,D. Šálek,David Sankey,M. Sauter,Emmanuel Sauvan,Stefan Schmitt,Laurent Schoeffel,A. Schöning,Hans-Christian Schultz-Coulon,F. Sefkow,S. Shushkevich,Yury Soloviev,Paweł Sopicki,D. South,V. Spaskov,A. Specka,M. Steder,B. Stella,U. Straumann,Tomáš Sýkora,Paul Thompson,D. Traynor,P. Truöl,I. Tsakov,B. Tseepeldorj,J. Turnau,Alice Valkárová,C. Vallée,P. Van Mechelen,Y. Vazdik,D. Wegener,E. Wünsch,Josef Zacek,Z. Zhang,R. Žlebčík,H. Zohrabyan,F. Zomer;V. Andreev;H1 collaboration;A. Baghdasaryan;K. Begzsuren;A. Belousov;P. Belov;V. Boudry;G. Brandt;M. Brinkmann;V. Brisson;D. Britzger;A. Buniatyan;A. Bylinkin;L. Bystritskaya;A. J. Campbell;K. B. Cantun Avila;F. Ceccopieri;Karel Černý;V. Chekelian;J. G. Contreras;J. B. Dainton;K. Daum;Cristinel Diaconu;M. Dobre;V. Dodonov;A. Dossanov;G. Eckerlin;S. Egli;E. Elsen;L. Favart;A. Fedotov;J. Feltesse;J. Ferencei;M. Fleischer;Alexander Fomenko;E. Gabathuler;J. Gayler;S. Ghazaryan;A. Glazov;Lidia Goerlich;N. Gogitidze;M. Gouzevitch;C. Grab;A. Grebenyuk;T. Greenshaw;G. Grindhammer;D. Haidt;R. C. W. Henderson;M. Herbst;J. Hladkỳ;D. Hoffmann;R. Horisberger;T. Hreus;F. Huber;M. Jacquet;Xavier Janssen;Hannes Jung;M. Kapichine;C. Kiesling;M. Klein;C. Kleinwort;Roman Kogler;P. Kostka;Jan Kretzschmar;K. Krüger;Murrough Landon;W. Lange;Paul 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;G. Nowak;J. E. Olsson;D. Ozerov;P. Pahl;C. Pascaud;G. D. Patel;E. Perez;A. Petrukhin;I. Picuric;H. Pirumov;D. Pitzl;R. Plačakytė;B. Pokorny;R. Polifka;V. Radescu;N. Raicevic;T. Ravdandorj;P. Reimer;Eram Rizvi;P. Robmann;R. Roosen;A. Rostovtsev;Marina Rotaru;S. Rusakov;D. Šálek;David Sankey;M. Sauter;Emmanuel Sauvan;Stefan Schmitt;Laurent Schoeffel;A. Schöning;Hans-Christian Schultz-Coulon;F. Sefkow;S. Shushkevich;Yury Soloviev;Paweł Sopicki;D. South;V. Spaskov;A. Specka;M. Steder;B. Stella;U. Straumann;Tomáš Sýkora;Paul Thompson;D. Traynor;P. Truöl;I. Tsakov;B. Tseepeldorj;J. Turnau;Alice Valkárová;C. Vallée;P. Van Mechelen;Y. Vazdik;D. Wegener;E. Wünsch;Josef Zacek;Z. Zhang;R. Žlebčík;H. Zohrabyan;F. Zomer;

the european physical journal c 2015 Vol. 75 pp. 65-

223

zomer2015themeasurement

Abstract

Inclusive jet, dijet and trijet differential cross sections are measured in neutral current deep-inelastic scattering for exchanged boson virtualities $150 < Q^2 < 15\,000\,{\mathrm {GeV}^2}$ using the H1 detector at HERA. The data were taken in the years 2003 to 2007 and correspond to an integrated luminosity of $351~\mathrm {pb}^{-1}$. Double differential Jet cross sections are obtained using a regularised unfolding procedure. They are presented as a function of $Q^2$ and the transverse momentum of the jet, $P_\mathrm{T}^\mathrm{jet}$, and as a function of $Q^2$ and the proton’s longitudinal momentum fraction, $\xi $, carried by the parton participating in the hard interaction. In addition normalised double differential jet cross sections are measured as the ratio of the jet cross sections to the inclusive neutral current cross sections in the respective $Q^2$ bins of the jet measurements. Compared to earlier work, the measurements benefit from an improved reconstruction and calibration of the hadronic final state. The cross sections are compared to perturbative QCD calculations in next-to-leading order and are used to determine the running coupling and the value of the strong coupling constant as $\alpha _s(M_Z) = 0.1165 \;\, (8)_\mathrm{exp} \;\, (38)_\mathrm{pdf,theo}$.

Keywords

alpha function neutral mathrm double differential varvec differential jet

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10.1140/epjc/s10052-014-3223-6

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