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Buszello, Claus P
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Publications (10 of 472) Show all publications
Abazov, V. M., Buszello, C. P. & Zivkovic, L. (2019). Properties of Z(c)(+/-)(3900) produced in p(p)over-bar collisions. Physical Review D: covering particles, fields, gravitation, and cosmology, 100(1), Article ID 012005.
Open this publication in new window or tab >>Properties of Z(c)(+/-)(3900) produced in p(p)over-bar collisions
2019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 100, no 1, article id 012005Article in journal (Refereed) Published
Abstract [en]

We study the production of the exotic charged charmoniumlike state Z(c)(+/-)(3900) in p (p) over bar collisions through the sequential process psi(4260) -> Z(c)(+/-)(3900)(pi)(-/+), Z(c)(+/-)(3900) -> J/psi pi(+/-). Using the subsample of candidates originating from semi-inclusive weak decays of b-flavored hadrons, we measure the invariant mass and natural width to be M = 3902.6(-5.0)(+5.2)(stat)(-1.4)(+3.3)(syst) MeV and Gamma = 32(-21)(+28)(stat)(-7)(+26)(syst) MeV, respectively. We search for prompt production of the Z(c)(+/-)(3900) through the same sequential process. No significant signal is observed, and we set an upper limit of 0.70 at the 95% credibility level on the ratio of prompt production to the production via b-hadron decays. The study is based on 10.4 fb(-1) of p (p) over bar collision data collected by the D0 experiment at the Fermilab Tevatron collider.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC, 2019
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-392581 (URN)10.1103/PhysRevD.100.012005 (DOI)000477896800002 ()
Funder
Swedish Research Council
Note

For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.100.012005

Available from: 2019-09-09 Created: 2019-09-09 Last updated: 2019-09-09Bibliographically approved
Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Agnew, J. P., . . . Zivkovic, L. (2018). Evidence for Z(c)(+/-)(3900) in semi-inclusive decays of b-flavored hadrons. Physical Review D: covering particles, fields, gravitation, and cosmology, 98(5), Article ID 052010.
Open this publication in new window or tab >>Evidence for Z(c)(+/-)(3900) in semi-inclusive decays of b-flavored hadrons
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2018 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 98, no 5, article id 052010Article in journal (Refereed) Published
Abstract [en]

We present evidence for the exotic charged charmoniumlike state Z(c)(+/-)(3900) decaying to J/psi pi(+/-) in semi-inclusive weak decays of b-flavored hadrons. The signal is correlated with a parent J/psi pi(+)pi(-) system in the invariant-mass range 4.2-4.7 GeV that would include the exotic structure Y(4260). The study is based on 10.4 fb(-1) of p (p) over bar collision data collected by the D0 experiment at the Fermilab Tevatron collider.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC, 2018
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-368103 (URN)10.1103/PhysRevD.98.052010 (DOI)000446281700001 ()
Funder
Swedish Research Council
Available from: 2018-12-06 Created: 2018-12-06 Last updated: 2018-12-06Bibliographically approved
Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Agnew, J. P., . . . Zivkovic, L. (2018). Measurement of the Effective Weak Mixing Angle in p¯p→Z/γ∗→ℓ+ℓ− Events. Physical Review Letters, 120(24), Article ID 241802.
Open this publication in new window or tab >>Measurement of the Effective Weak Mixing Angle in p¯p→Z/γ∗→ℓ+ℓ− Events
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2018 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 120, no 24, article id 241802Article in journal (Refereed) Published
Abstract [en]

We present a measurement of the effective weak mixing angle parameter sin(2)theta(l)(eff) in p (p) over bar -> Z/gamma* -> mu(+)mu(-) events at a center-of-mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron Collider and corresponding to 8.6 fb(-1) of integrated luminosity. The measured value of sin(2)theta(l)(eff)[mu mu] = 0.23016 +/- 0.00064 is further combined with the result from the D0 measurement in p (p) over bar -> Z/gamma* -> e(+)e(-) events, resulting in sin(2)theta(l)(eff)[comb] = 0.23095 +/- 0.00040. This combined result is the most precise measurement from a single experiment at a hadron collider and is the most precise determination using the coupling of the Z/gamma* to light quarks.

National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-358381 (URN)10.1103/PhysRevLett.120.241802 (DOI)000435081500002 ()
Funder
Swedish Research Council
Note

Title in WoS: Measurement of the Effective Weak Mixing Angle in p(p)over-bar -> Z/gamma* -> l(+) l(-) Events

Available from: 2018-08-28 Created: 2018-08-28 Last updated: 2018-08-28Bibliographically approved
Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Agnew, J. P., . . . Zivkovic, L. (2018). Study of the X-+/-(5568) state with semileptonic decays of the B-s(0) meson. Physical Review D: covering particles, fields, gravitation, and cosmology, 97(9), Article ID 092004.
Open this publication in new window or tab >>Study of the X-+/-(5568) state with semileptonic decays of the B-s(0) meson
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2018 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 97, no 9, article id 092004Article in journal (Refereed) Published
Abstract [en]

We present a study of the X-+/-(5568) using semileptonic decays of the B-s(0) meson using the full run II integrated luminosity of 10.4 fb(-1) in proton-antiproton collisions at a center of mass energy of 1.96 TeV collected with the DO detector at the Fermilab Tevatron Collider. We report evidence for a narrow structure, X-+/-(5568), in the decay sequence X-+/-(5568) -> B-s(0) pi(+/-) where B-s(0)-> mu(-/+) (DsX)-X-+/-, D-s(+/-)-> phi pi(+/-)which is consistent with the previous measurement by the DO Collaboration in the hadronic decay mode, X-+/-(5568) -> B-s(0)pi(+/-) where B-s(0 )-> J/psi phi. The mass and width of this state are measured using a combined fit of the hadronic and semileptonic data, yielding m = 5566.9(-3.1)(+3.2)(stat)(-1.2)(+0.6)(syst) MeV/c(2), Gamma = 18.6(-6.1)(+7.9)(stat)(-3.8)(+3.5) (syst) McV/c(2) with a significance of 6.7 sigma.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC, 2018
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-357280 (URN)10.1103/PhysRevD.97.092004 (DOI)000433027600002 ()
Funder
Swedish Research Council
Available from: 2018-08-17 Created: 2018-08-17 Last updated: 2018-08-17Bibliographically approved
Aaltonen, T., Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., . . . Zucchelli, S. (2018). Tevatron Run II combination of the effective leptonic electroweak mixing angle. Physical Review D: covering particles, fields, gravitation, and cosmology, 97(11), Article ID 112007.
Open this publication in new window or tab >>Tevatron Run II combination of the effective leptonic electroweak mixing angle