Search for the Xb and other hidden-beauty states in the π+π-ϒ(1S) channel at ATLAS

G. Aad; B. Abbott; J. Abdallah; S.A. Abdel Khalek; O. Abdinov; R. Aben; B. Abi; M. Abolins; O.S. AbouZeid; H. Abramowicz; Mogens Dam; Jørn Dines Hansen; Jørgen Beck Hansen; Stefania Xella; Peter Henrik Hansen; Troels Christian Petersen; Lotte Ansgaard Thomsen; Sascha Mehlhase; Morten Dam Jørgensen; Almut Maria Pingel; Ask Emil Løvschall-Jensen; Alejandro Alonso Diaz; James William Monk; Lars Egholm Pedersen; Graig Wiglesworth; Gorm Aske Gram Krohn Galster

doi:10.1016/j.physletb.2014.11.055

Search for the X_b and other hidden-beauty states in the π⁺π^-ϒ(1S) channel at ATLAS

G. Aad, B. Abbott, J. Abdallah, S.A. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, M. Abolins, O.S. AbouZeid, H. Abramowicz, Mogens Dam, Jørn Dines Hansen, Jørgen Beck Hansen, Stefania Xella, Peter Henrik Hansen, Troels Christian Petersen, Lotte Ansgaard Thomsen, Sascha Mehlhase, Morten Dam Jørgensen, Almut Maria PingelAsk Emil Løvschall-Jensen, Alejandro Alonso Diaz, James William Monk, Lars Egholm Pedersen, Graig Wiglesworth, Gorm Aske Gram Krohn Galster

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Abstract

This Letter presents a search for a hidden-beauty counterpart of the X(3872) in the mass ranges of 10.05–10.31 GeV and 10.40–11.00 GeV, in the channel X_b→π⁺π⁻ϒ(1S)(→μ⁺μ⁻), using 16.2 fb⁻¹ of s=8 TeV pp collision data collected by the ATLAS detector at the LHC. No evidence for new narrow states is found, and upper limits are set on the product of the X_b cross section and branching fraction, relative to those of the ϒ(2S), at the 95% confidence level using the CL_S approach. These limits range from 0.8% to 4.0%, depending on mass. For masses above 10.1 GeV, the expected upper limits from this analysis are the most restrictive to date. Searches for production of the ϒ(1³D_J), ϒ(10860), and ϒ(11020) states also reveal no significant signals.

Originalsprog	Engelsk
Tidsskrift	Physics Letters B
Vol/bind	740
Sider (fra-til)	199-217
Antal sider	19
ISSN	0370-2693
DOI	https://doi.org/10.1016/j.physletb.2014.11.055
Status	Udgivet - 5 jan. 2015

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10.1016/j.physletb.2014.11.055Licens: CC BY

1-s2.0-S0370269314008648-mainForlagets udgivne version, 1,39 MBLicens: CC BY

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Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S. A., Abdinov, O., Aben, R., Abi, B., Abolins, M., AbouZeid, O. S., Abramowicz, H., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Mehlhase, S., Jørgensen, M. D., ... Galster, G. A. G. K. (2015). Search for the X_b and other hidden-beauty states in the π⁺π^-ϒ(1S) channel at ATLAS. Physics Letters B, 740, 199-217. https://doi.org/10.1016/j.physletb.2014.11.055

Aad, G, Abbott, B, Abdallah, J, Abdel Khalek, SA, Abdinov, O, Aben, R, Abi, B, Abolins, M, AbouZeid, OS, Abramowicz, H, Dam, M , Hansen, JD , Hansen, JB , Xella, S , Hansen, PH , Petersen, TC, Thomsen, LA, Mehlhase, S, Jørgensen, MD, Pingel, AM, Løvschall-Jensen, AE, Alonso Diaz, A, Monk, JW, Pedersen, LE, Wiglesworth, G & Galster, GAGK 2015, 'Search for the X_b and other hidden-beauty states in the π⁺π^-ϒ(1S) channel at ATLAS', Physics Letters B, bind 740, s. 199-217. https://doi.org/10.1016/j.physletb.2014.11.055

@article{86883b45dd2148fba14cde32436e90a1,

title = "Search for the Xb and other hidden-beauty states in the π+π-ϒ(1S) channel at ATLAS",

abstract = "This Letter presents a search for a hidden-beauty counterpart of the X(3872) in the mass ranges of 10.05–10.31 GeV and 10.40–11.00 GeV, in the channel Xb→π+π−ϒ(1S)(→μ+μ−), using 16.2 fb−1 of s=8 TeV pp collision data collected by the ATLAS detector at the LHC. No evidence for new narrow states is found, and upper limits are set on the product of the Xb cross section and branching fraction, relative to those of the ϒ(2S), at the 95% confidence level using the CLS approach. These limits range from 0.8% to 4.0%, depending on mass. For masses above 10.1 GeV, the expected upper limits from this analysis are the most restrictive to date. Searches for production of the ϒ(13DJ), ϒ(10860), and ϒ(11020) states also reveal no significant signals.",

author = "G. Aad and B. Abbott and J. Abdallah and {Abdel Khalek}, S.A. and O. Abdinov and R. Aben and B. Abi and M. Abolins and O.S. AbouZeid and H. Abramowicz and Mogens Dam and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Stefania Xella and Hansen, {Peter Henrik} and Petersen, {Troels Christian} and Thomsen, {Lotte Ansgaard} and Sascha Mehlhase and J{\o}rgensen, {Morten Dam} and Pingel, {Almut Maria} and L{\o}vschall-Jensen, {Ask Emil} and {Alonso Diaz}, Alejandro and Monk, {James William} and Pedersen, {Lars Egholm} and Graig Wiglesworth and Galster, {Gorm Aske Gram Krohn}",

year = "2015",

month = jan,

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doi = "10.1016/j.physletb.2014.11.055",

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T1 - Search for the Xb and other hidden-beauty states in the π+π-ϒ(1S) channel at ATLAS

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.A.

AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - AbouZeid, O.S.

AU - Abramowicz, H.

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Xella, Stefania

AU - Hansen, Peter Henrik

AU - Petersen, Troels Christian

AU - Thomsen, Lotte Ansgaard

AU - Mehlhase, Sascha

AU - Jørgensen, Morten Dam

AU - Pingel, Almut Maria

AU - Løvschall-Jensen, Ask Emil

AU - Alonso Diaz, Alejandro

AU - Monk, James William

AU - Pedersen, Lars Egholm

AU - Wiglesworth, Graig

AU - Galster, Gorm Aske Gram Krohn

PY - 2015/1/5

Y1 - 2015/1/5

N2 - This Letter presents a search for a hidden-beauty counterpart of the X(3872) in the mass ranges of 10.05–10.31 GeV and 10.40–11.00 GeV, in the channel Xb→π+π−ϒ(1S)(→μ+μ−), using 16.2 fb−1 of s=8 TeV pp collision data collected by the ATLAS detector at the LHC. No evidence for new narrow states is found, and upper limits are set on the product of the Xb cross section and branching fraction, relative to those of the ϒ(2S), at the 95% confidence level using the CLS approach. These limits range from 0.8% to 4.0%, depending on mass. For masses above 10.1 GeV, the expected upper limits from this analysis are the most restrictive to date. Searches for production of the ϒ(13DJ), ϒ(10860), and ϒ(11020) states also reveal no significant signals.

AB - This Letter presents a search for a hidden-beauty counterpart of the X(3872) in the mass ranges of 10.05–10.31 GeV and 10.40–11.00 GeV, in the channel Xb→π+π−ϒ(1S)(→μ+μ−), using 16.2 fb−1 of s=8 TeV pp collision data collected by the ATLAS detector at the LHC. No evidence for new narrow states is found, and upper limits are set on the product of the Xb cross section and branching fraction, relative to those of the ϒ(2S), at the 95% confidence level using the CLS approach. These limits range from 0.8% to 4.0%, depending on mass. For masses above 10.1 GeV, the expected upper limits from this analysis are the most restrictive to date. Searches for production of the ϒ(13DJ), ϒ(10860), and ϒ(11020) states also reveal no significant signals.

U2 - 10.1016/j.physletb.2014.11.055

DO - 10.1016/j.physletb.2014.11.055

M3 - Journal article

SN - 0370-2693

VL - 740

SP - 199

EP - 217

JO - Physics Letters B

JF - Physics Letters B

ER -

Search for the Xb and other hidden-beauty states in the π+π-ϒ(1S) channel at ATLAS

Abstract

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Search for the X_b and other hidden-beauty states in the π⁺π^-ϒ(1S) channel at ATLAS