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Measurement of τ polarisation in Z / γ ∗ → τ τ decays in proton-proton collisions at s = 8 TeV with the ATLAS detector.

Publication ,  Journal Article
Aaboud, M; Aad, G; Abbott, B; Abdinov, O; Abeloos, B; Abidi, SH; AbouZeid, OS; Abraham, NL; Abramowicz, H; Abreu, H; Abreu, R; Abulaiti, Y ...
Published in: The European physical journal. C, Particles and fields
January 2018

This paper presents a measurement of the polarisation of τ leptons produced in Z / γ ∗ → τ τ decays which is performed with a dataset of proton-proton collisions at s = 8 TeV, corresponding to an integrated luminosity of 20.2 fb - 1 recorded with the ATLAS detector at the LHC in 2012. The Z / γ ∗ → τ τ decays are reconstructed from a hadronically decaying τ lepton with a single charged particle in the final state, accompanied by a τ lepton that decays leptonically. The τ polarisation is inferred from the relative fraction of energy carried by charged and neutral hadrons in the hadronic τ decays. The polarisation is measured in a fiducial region that corresponds to the kinematic region accessible to this analysis. The τ polarisation extracted over the full phase space within the Z / γ ∗ mass range of 66 < m Z / γ ∗ < 116 GeV is found to be P τ = - 0.14 ± 0.02 ( stat ) ± 0.04 ( syst ) . It is in agreement with the Standard Model prediction of P τ = - 0.1517 ± 0.0019 , which is obtained from the ALPGEN event generator interfaced with the PYTHIA 6 parton shower modelling and the TAUOLA τ decay library.

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Published In

The European physical journal. C, Particles and fields

DOI

EISSN

1434-6052

ISSN

1434-6044

Publication Date

January 2018

Volume

78

Issue

2

Start / End Page

163

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5102 Atomic, molecular and optical physics
  • 5101 Astronomical sciences
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

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Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abidi, S. H., … Coadou, Y. (2018). Measurement of τ polarisation in Z / γ ∗ → τ τ decays in proton-proton collisions at s = 8 TeV with the ATLAS detector. The European Physical Journal. C, Particles and Fields, 78(2), 163. https://doi.org/10.1140/epjc/s10052-018-5619-1
Aaboud, M., G. Aad, B. Abbott, O. Abdinov, B. Abeloos, S. H. Abidi, O. S. AbouZeid, et al. “Measurement of τ polarisation in Z / γ ∗ → τ τ decays in proton-proton collisions at s = 8 TeV with the ATLAS detector.The European Physical Journal. C, Particles and Fields 78, no. 2 (January 2018): 163. https://doi.org/10.1140/epjc/s10052-018-5619-1.
Aaboud M, Aad G, Abbott B, Abdinov O, Abeloos B, Abidi SH, et al. Measurement of τ polarisation in Z / γ ∗ → τ τ decays in proton-proton collisions at s = 8 TeV with the ATLAS detector. The European physical journal C, Particles and fields. 2018 Jan;78(2):163.
Aaboud, M., et al. “Measurement of τ polarisation in Z / γ ∗ → τ τ decays in proton-proton collisions at s = 8 TeV with the ATLAS detector.The European Physical Journal. C, Particles and Fields, vol. 78, no. 2, Jan. 2018, p. 163. Epmc, doi:10.1140/epjc/s10052-018-5619-1.
Aaboud M, Aad G, Abbott B, Abdinov O, Abeloos B, Abidi SH, AbouZeid OS, Abraham NL, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adachi S, Adamczyk L, Adelman J, Adersberger M, Adye T, Affolder AA, Afik Y, Agatonovic-Jovin T, Agheorghiesei C, Aguilar-Saavedra JA, Ahlen SP, Ahmadov F, Aielli G, Akatsuka S, Akerstedt H, Åkesson TPA, Akilli E, Akimov AV, Alberghi GL, Albert J, Albicocco P, Alconada Verzini MJ, Alderweireldt SC, Aleksa M, Aleksandrov IN, Alexa C, Alexander G, Alexopoulos T, Alhroob M, Ali B, Aliev M, Alimonti G, Alison J, Alkire SP, Allbrooke BMM, Allen BW, Allport PP, Aloisio A, Alonso A, Alonso F, Alpigiani C, Alshehri AA, Alstaty MI, Alvarez Gonzalez B, Álvarez Piqueras D, Alviggi MG, Amadio BT, Amaral Coutinho Y, Amelung C, Amidei D, Amor Dos Santos SP, Amoroso S, Amundsen G, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders JK, Anderson KJ, Andreazza A, Andrei V, Angelidakis S, Angelozzi I, Angerami A, Anisenkov AV, Anjos N, Annovi A, Antel C, 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Battaglia M, Bauce M, Bauer F, Bawa HS, Beacham JB, Beattie MD, Beau T, Beauchemin PH, Bechtle P, Beck HP, Beck HC, Becker K, Becker M, Becot C, Beddall AJ, Beddall A, Bednyakov VA, Bedognetti M, Bee CP, Beermann TA, Begalli M, Begel M, Behr JK, Bell AS, Bella G, Bellagamba L, Bellerive A, Bellomo M, Belotskiy K, Beltramello O, Belyaev NL, Benary O, Benchekroun D, Bender M, Benekos N, Benhammou Y, Benhar Noccioli E, Benitez J, Benjamin DP, Benoit M, Bensinger JR, Bentvelsen S, Beresford L, Beretta M, Berge D, Bergeaas Kuutmann E, Berger N, Beringer J, Berlendis S, Bernard NR, Bernardi G, Bernius C, Bernlochner FU, Berry T, Berta P, Bertella C, Bertoli G, Bertram IA, Bertsche C, Bertsche D, Besjes GJ, Bessidskaia Bylund O, Bessner M, Besson N, Bethani A, Bethke S, Betti A, Bevan AJ, Beyer J, Bianchi RM, Biebel O, Biedermann D, Bielski R, Bierwagen K, Biesuz NV, Biglietti M, Billoud TRV, Bilokon H, Bindi M, Bingul A, Bini C, Biondi S, Bisanz T, Bittrich C, Bjergaard DM, Black JE, Black KM, Blair RE, Blazek T, Bloch I, Blocker C, Blue A, Blumenschein U, Blunier S, Bobbink GJ, Bobrovnikov VS, Bocchetta SS, Bocci A, Bock C, Boehler M, Boerner D, Bogavac D, Bogdanchikov AG, Bohm C, Boisvert V, Bokan P, Bold T, Boldyrev AS, Bolz AE, Bomben M, Bona M, Boonekamp M, Borisov A, Borissov G, Bortfeldt J, Bortoletto D, Bortolotto V, Boscherini D, Bosman M, Bossio Sola JD, Boudreau J, Bouhova-Thacker EV, Boumediene D, Bourdarios C, Boutle SK, Boveia A, Boyd J, Boyko IR, Bozson AJ, Bracinik J, Brandt A, Brandt G, Brandt O, Braren F, Bratzler U, Brau B, Brau JE, Breaden Madden WD, Brendlinger K, Brennan AJ, Brenner L, Brenner R, Bressler S, Briglin DL, Bristow TM, Britton D, Britzger D, Brochu FM, Brock I, Brock R, Brooijmans G, Brooks T, Brooks WK, Brosamer J, Brost E, Broughton JH, Bruckman de Renstrom PA, Bruncko D, Bruni A, Bruni G, Bruni LS, Bruno S, Brunt BH, Bruschi M, Bruscino N, Bryant P, Bryngemark L, Buanes T, Buat Q, Buchholz P, Buckley AG, Budagov IA, Buehrer F, Bugge MK, Bulekov O, Bullock D, Burch TJ, Burdin S, Burgard CD, Burger AM, Burghgrave B, Burka K, Burke S, Burmeister I, Burr JTP, Busato E, Büscher D, Büscher V, Bussey P, Butler JM, Buttar CM, Butterworth JM, Butti P, Buttinger W, Buzatu A, Buzykaev AR, Cabrera Urbán S, Caforio D, Cai H, Cairo VM, Cakir O, Calace N, Calafiura P, Calandri A, Calderini G, Calfayan P, Callea G, Caloba LP, Calvente Lopez S, Calvet D, Calvet S, Calvet TP, Camacho Toro R, Camarda S, Camarri P, Cameron D, Caminal Armadans R, Camincher C, Campana S, Campanelli M, Camplani A, Campoverde A, Canale V, Cano Bret M, Cantero J, Cao T, Capeans Garrido MDM, Caprini I, Caprini M, Capua M, Carbone RM, Cardarelli R, Cardillo F, Carli I, Carli T, Carlino G, Carlson BT, Carminati L, Carney RMD, Caron S, Carquin E, Carrá S, Carrillo-Montoya GD, Casadei D, Casado MP, Casha AF, Casolino M, Casper DW, Castelijn R, Castillo Gimenez V, Castro NF, Catinaccio A, Catmore JR, Cattai A, Caudron J, Cavaliere V, Cavallaro E, Cavalli D, Cavalli-Sforza M, Cavasinni V, Celebi E, Ceradini F, Cerda Alberich L, Cerqueira AS, Cerri A, Cerrito L, Cerutti F, Cervelli A, Cetin SA, Chafaq A, Chakraborty D, Chan SK, Chan WS, Chan YL, Chang P, Chapman JD, Charlton DG, Chau CC, Chavez Barajas CA, Che S, Cheatham S, Chegwidden A, Chekanov S, Chekulaev SV, Chelkov GA, Chelstowska MA, Chen C, Chen H, Chen J, Chen S, Chen X, Chen Y, Cheng HC, Cheng HJ, Cheplakov A, Cheremushkina E, Cherkaoui El Moursli R, Cheu E, Cheung K, Chevalier L, Chiarella V, Chiarelli G, Chiodini G, Chisholm AS, Chitan A, Chiu YH, Chizhov MV, Choi K, Chomont AR, Chouridou S, Chow YS, Christodoulou V, Chu MC, Chudoba J, Chuinard AJ, Chwastowski JJ, Chytka L, Ciftci AK, Cinca D, Cindro V, Cioara IA, Ciocio A, Cirotto F, Citron ZH, Citterio M, Ciubancan M, Clark A, Clark BL, Clark MR, Clark PJ, Clarke RN, Clement C, Coadou Y. Measurement of τ polarisation in Z / γ ∗ → τ τ decays in proton-proton collisions at s = 8 TeV with the ATLAS detector. The European physical journal C, Particles and fields. 2018 Jan;78(2):163.
Journal cover image

Published In

The European physical journal. C, Particles and fields

DOI

EISSN

1434-6052

ISSN

1434-6044

Publication Date

January 2018

Volume

78

Issue

2

Start / End Page

163

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5102 Atomic, molecular and optical physics
  • 5101 Astronomical sciences
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics