Search for the lepton flavor violating decay Z → eμ in pp collisions at s=8 TeV with the ATLAS detector

The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process Z → eμ in pp collisions using 20.3 fb-1 of data collected at $ \sqrt{s}$ = 8 TeV. An enhancement in the eμ invariant mass spectrum is searched for at the Z-boson mass. The number of Z bosons pro...

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Veröffentlicht in:	Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2014-10, Vol.90 (7)
Hauptverfasser:	Adams, D. L., Agatonovic-Jovin, T., Alison, J., Amor Dos Santos, S. P., Bauer, F., Beemster, L. J., Bingul, A., Bogdanchikov, A. G., Bohm, J., Boldea, V., Butler, B., Buttar, C. M., Cerqueira, A. S., Chekulaev, S. V., Collot, J., Dallapiccola, C., de Asmundis, R., Demilly, A., Desch, K., Diehl, E. B., Ernst, M., Ertel, E., Fiedler, F., Fleischmann, S., Gabizon, O., Godlewski, J., Goshaw, A. T., Gramling, J., Hasegawa, Y., Hobbs, J., Hong, T. M., Hu, D., Huth, J., Ioannou, P., Joshi, K. D., Juste Rozas, A., Kantserov, V. A., Karakostas, K., Karastathis, N., Khovanskiy, V., Klioutchnikova, T., Koll, J., Lang, V. S., Leyko, A. M., Loch, P., Lorenzo Martinez, N., Madsen, A., Martin, B., Mashinistov, R., Merritt, F. S., Milstead, D. A., Ming, Y., Murray, W. J., Myagkov, A. G., Nagai, K., Negri, G., Okumura, Y., Otero y Garzon, G., Pagan Griso, S., Paganis, E., Pater, J. R., Pettersson, N. E., Pignotti, D. T., Polifka, R., Radloff, P., Reece, R., Renaud, A., Rosati, S., Ruan, X., Santoni, C., Savard, P., Silva, J., Smirnova, O., Sopko, V., Soukharev, A. M., Spurlock, B., Tassi, E., Taylor, W., Thomas, J. P., Trigger, I. M., Tsiskaridze, S., Tyndel, M., Usanova, A., Vazeille, F., Veloso, F., Vichou, I., Volpi, M., Vorobel, V., Vos, M., Vossebeld, J. H., Webster, J. S., Wenaus, T., Wiglesworth, C., Wittkowski, J., Ye, J., Ye, S., Yoosoofmiya, R., Zaitsev, A. M., Zhemchugov, A., Zhou, B.
Format:	Artikel
Sprache:	eng
Schlagworte:	PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Zusammenfassung:	The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process Z → eμ in pp collisions using 20.3 fb-1 of data collected at $ \sqrt{s}$ = 8 TeV. An enhancement in the eμ invariant mass spectrum is searched for at the Z-boson mass. The number of Z bosons produced in the data sample is estimated using events of similar topology, Z → ee and μμ, significantly reducing the systematic uncertainty in the measurement. There is no evidence of an enhancement at the Z-boson mass, resulting in an upper limit on the branching fraction, B(Z → 7.5 × 10.7 at the 95% confidence level.
ISSN:	1550-7998 1550-2368
DOI:	10.1103/PhysRevD.90.072010