S. Khalil - Academia.edu (original) (raw)

Papers by S. Khalil

Research paper thumbnail of One-stage lingual augmented urethroplasty in repair of distal penile hypospadias

Objectives: To evaluate the outcome of augmentation of shallow urethral plate by lingual graft in... more Objectives: To evaluate the outcome of augmentation of shallow urethral plate by lingual graft in repair of distal penile hypospadias. Patients and methods: Between June 2008 and May 2011, the procedure was performed on 23 patients with mean age 2.3 years (range 1–3). All patients had distal penile hypospadias; 11 sub coronal and 12 coronal. The urethral plate was less than 8 mm in all patients and 3 of them had history of previous hypospadias surgery. All procedures were carried out under general anesthesia using 4× magnifying loupe. After penile degloving and dorsal incision of the urethral plate, the lingual graft was harvested and sutured to the edges of the incised urethral plate from the hypospadias opening to the tip of the penis. The neourethra was closed and an intervening flap was fixed over the neourethra as a barrier against fistula formation. Results: Success rate was 87% as 20/23 patients were cured without any permanent complication throughout the follow up period. None of patients suffered meatal stenosis or required regular urethral dilatation. Three patients developed urethrocutaneous fistula, of which two closed spontaneously and one required surgical repair 6 months later. Two patients had failed procedures and delayed re-intervention was performed due to complete loss of the graft in one of them and repair disruption following infection in the other. Two patients had post-operative pain in the graft harvesting site which disappeared within days. Conclusion: The one-stage lingual augmented urethral plate urethroplasty offers promising outcomes for repair of distal penile hypospadias with narrow urethral plate.

Research paper thumbnail of Neoadjuvant Hormonal Therapy Versus Radiotherapy Alone in Treatment of Locally Advanced Prostate Cancer

Introduction: Despite adequate local therapy for carcinoma of the prostate, significant proportio... more Introduction: Despite adequate local therapy for carcinoma of the prostate, significant proportion of patients developed a progressive or metastatic disease. Neoadjuvant hormonal therapy not only provides possible early systemic treatment for a subclinical disease, but may also help in improving local disease control by increasing the number of patients eligible for definitive local therapy (via down staging).

Research paper thumbnail of Relic neutralino density in scenarios with intermediate unification scale

New Journal of Physics, 2002

We analyse the relic neutralino density in supersymmetric models with an intermediate unification... more We analyse the relic neutralino density in supersymmetric models with an intermediate unification scale. In particular, we present concrete cosmological scenarios where the reheating temperature is as small as O(1 − 1000 MeV). When this temperature is associated to the decay of moduli fields producing neutralinos, we show that the relic abundance increases considerably with respect to the standard thermal production. Thus the neutralino becomes a good dark matter candidate with 0.

Research paper thumbnail of Study of the semileptonic decay D{sub s}{sup +}{yields}f{sub 0}(980)e{sup +}{nu} and implications for B{sub s}{sup 0}{yields}J/{psi}f{sub 0}

Physical review D: Particles and fields

Using e{sup +}e{sup -}{yields}D{sub s}{sup -}D{sub s}*{sup +} and D{sub s}*{sup -}D{sub s}{sup +}... more Using e{sup +}e{sup -}{yields}D{sub s}{sup -}D{sub s}*{sup +} and D{sub s}*{sup -}D{sub s}{sup +} interactions at 4170 MeV collected with the CLEO-c detector, we investigate the semileptonic decays D{sub s}{sup +}{yields}f{sub 0}(980)e{sup +}{nu} and D{sub s}{sup +}{yields}{phi}e{sup +}{nu}. By examining the decay rates as functions of the four-momentum transfer squared q{sup 2}, we measure the ratio [(dB/dq{sup 2})(D{sub s}{sup +}{yields}f{sub 0}(980)e{sup +}{nu})B(f{sub 0}{yields}{pi}{sup +}{pi}{sup -})]/[(dB/dq{sup 2})(D{sub s}{sup +}{yields}{phi}e{sup +}{nu})B({phi}{yields}K{sup +}K{sup -})] at q{sup 2} of zero to be (42{+-}11)%. This ratio has been predicted to equal the rate ratio [B(B{sub s}{yields}J/{psi}f{sub 0})B(f{sub 0}{yields}{pi}{sup +}{pi}{sup -})]/[B(B{sub s}{yields}J/{psi}{phi})B({phi}{yields}K{sup +}K{sup -})], thus indicating that the CP eigenstate J/{psi}f{sub 0} could be useful for measuring CP violation via B{sub s} mixing. Assuming a simple pole model for the ...

Research paper thumbnail of Study of di-pion transitions among Upsilon(3S), Upsilon(2S), and Upsilon(1S) states

Phys.Rev., 2007

We present measurements of decay matrix elements for hadronic transitions of the form Υ(nS) → Υ(m... more We present measurements of decay matrix elements for hadronic transitions of the form Υ(nS) → Υ(mS)ππ, where (n, m) = (3, 1), (2, 1), (3, 2). We reconstruct charged and neutral pion modes with the final state Upsilon decaying to either µ + µ − or e + e − . Dalitz plot distributions for the twelve decay modes are fit individually as well as jointly assuming isospin symmetry, thereby measuring the matrix elements of the decay amplitude. We observe and account for the anomaly previously noted in the di-pion invariant mass distribution for the Υ(3S) → Υ(1S)ππ transition and obtain good descriptions of the dynamics of the decay using the most general decay amplitude allowed by partial conservation of the axial-vector current (PCAC) considerations. The fits further indicate that the Υ(2S) → Υ(1S)ππ and Υ(3S) → Υ(2S)ππ transitions also show the presence of terms in the decay amplitude that were previously ignored, although at a relatively suppressed level.

Research paper thumbnail of CP violation versus flavour in supersymmetric theories

Research paper thumbnail of Observation of χcJ Radiative Decays to Light Vector Mesons

Physical Review Letters, 2008

Using a total of 2.74 ×10 7 decays of the ψ(2S) collected with the CLEO-c detector, we present a ... more Using a total of 2.74 ×10 7 decays of the ψ(2S) collected with the CLEO-c detector, we present a study of χ cJ → γV , where V = ρ 0 , ω, φ. The transitions χ c1 → γρ 0 and χ c1 → γω are observed with B(χ c1 → γρ 0 ) = (2.43 ± 0.19 ± 0.22) × 10 −4 and B(χ c1 → γω) = (8.3 ± 1.5 ± 1.2) × 10 −5 . In the χ c1 → γρ 0 transition, the final state meson is dominantly longitudinally polarized. Upper limits on the branching fractions of other χ cJ states to light vector mesons are presented.

Research paper thumbnail of Measurement of Prominent η-Decay Branching Fractions

Physical Review Letters, 2007

The decay ψ(2S) → ηJ/ψ is used to measure, for the first time, all prominent η-meson branching fr... more The decay ψ(2S) → ηJ/ψ is used to measure, for the first time, all prominent η-meson branching fractions with the same experiment in the same dataset, thereby providing a consistent treatment of systematics across branching fractions. We present results for η decays to γγ, π + π − π 0 , 3π 0 , π + π − γ, and e + e − γ, accounting for 99.9% of all η decays. The precisions for several of the branching fractions and their ratios are improved. Two channels, π + π − γ and e + e − γ, show results that differ at the level of three standard deviations from those previously determined.

Research paper thumbnail of Measurement of the Decay Constant fDs+ Using Ds+→l+ν

Physical Review Letters, 2007

Research paper thumbnail of Possible Supersymmetric Solution to the Discrepancy between B→ϕK_{S} and B→η^{′}K_{S} CP Asymmetries

Physical Review Letters, 2003

We present a possible supersymmetric solution to the discrepancy between the observed mixing CP a... more We present a possible supersymmetric solution to the discrepancy between the observed mixing CP asymmetries in B → φKS and B → η ′ KS. We show that due to the different parity in the final states of these processes, their supersymmetric contributions from the R-sector have an opposite sign, which naturally leads to S φK S = S η ′ K S . We also consider the proposed mechanisms to solve the puzzle of the observed large branching ratio of B → η ′ K and their impact on S η ′ K S .

Research paper thumbnail of Measurement of B(Ds+→l+ν) and the decay constant fDs+ from 600 pb-1 of e+e- annihilation data near 4170 MeV

Research paper thumbnail of Absolute branching fraction measurements for exclusive Ds semileptonic decays

Research paper thumbnail of EDM constraints in supersymmetric theories

Nuclear Physics B, 2001

We systematically analyze constraints on supersymmetric theories imposed by the experimental boun... more We systematically analyze constraints on supersymmetric theories imposed by the experimental bounds on the electron, neutron, and mercury electric dipole moments. We critically reappraise the known mechanisms to suppress the EDMs and conclude that only the scenarios with approximate CP-symmetry or flavour-off-diagonal CP violation remain attractive after the addition of the mercury EDM constraint.

Research paper thumbnail of Yield stability of faba bean lines under diverse broomrape prone production environments

Field Crops Research, 2011

Faba bean (Vicia faba L.) is one of the important pulse crops grown in many parts of the world. I... more Faba bean (Vicia faba L.) is one of the important pulse crops grown in many parts of the world. Its production and productivity are affected by different biotic and abiotic stresses. Broomrape (Orobanche and Phelipanche spp.) causes yield losses of 7-80% in major faba bean growing countries mainly in the Mediterranean Basin and Nile Valley countries. Host plant resistance is found to be the most effective and economic method of broomrape control. Efforts made at the International Center for Agriculture Research in the Dry Areas over many years to develop advanced breeding lines with acceptable resistance and tolerance levels to broomrape have resulted in the identification of several useful breeding lines. These lines were shared with National Agricultural Research Systems (Egypt, Sudan, Tunisia and Portugal) as part of the Faba Bean Orobanche International Nursery, in order to test their stability across three seasons (2005, 2006 and 2007). The results showed that Orobanche plant number, dry weight, Orobanche index, flowering date, maturing date and grain yield were significantly different among lines and locations. AMMI analysis showed that some lines derived from hybrid bulk populations "HBP/DS0/2000" and "HBP/ES0/2000" showed acceptable levels of yield stability in the presence of Orobanche infections across all environments compared with susceptible check. In highly infested soils, the tolerant and resistant lines gave acceptable levels of yield compared with the susceptible check. However, the yield potential of resistant and tolerant lines in non-infested soils was lower than the highly susceptible check.

Research paper thumbnail of DFOFARAGAB

Research paper thumbnail of Group photo

Research paper thumbnail of Observation of the diphoton decay of the Higgs boson and measurement of its properties

Eur.Phys.J., 2014

Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of ... more Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and 2012 LHC running periods. The data samples correspond to integrated luminosities of 5.1[Formula: see text]at [Formula: see text] and 19.7[Formula: see text]at 8[Formula: see text] . A clear signal is observed in the diphoton channel at a mass close to 125[Formula: see text] with a local significance of [Formula: see text], where a significance of [Formula: see text] is expected for the standard model Higgs boson. The mass is measured to be [Formula: see text] , and the best-fit signal strength relative to the standard model prediction is [Formula: see text][Formula: see text][Formula: see text]. Additional measurements include the signal strength modifiers associated with different production mechanisms, and hypothesis tests between spin-0 and spin-2 models.

Research paper thumbnail of Measurement of the Z/γ*+b-jet cross section in pp collisions at √s = 7 TeV

Journal of High Energy Physics, 2012

Measurement of the Z/γ * + b-jet cross section in pp collisions at √ s = 7 TeV

Research paper thumbnail of Search for third-generation leptoquarks and scalar bottom quarks in pp collisions at root s=7 TeV

Journal of High Energy Physics, 2012

Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in ... more Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in a sample of proton-proton collisions at sqrt {s}= 7TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.7 fb-1. A scenario where the new particles are pair produced and each decays to ab quark plus a tau neutrino or neutralino is considered. The number of observed events is found to be in agreement with the standard model prediction. Upper limits are set at 95% confidence level on the ...

Research paper thumbnail of Studies of dijet transverse momentum balance and pseudorapidity distributions in pPb collisions at root s(NN)=5.02 TeV

European Physical Journal C, 2014

Dijet production has been measured in pPb collisions at a nucleon-nucleon centre-of-mass energy o... more Dijet production has been measured in pPb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. A data sample corresponding to an integrated luminosity of 35 nb −1 was collected using the Compact Muon Solenoid detector at the Large Hadron Collider. The dijet transverse momentum balance, azimuthal angle correlations, and pseudorapidity distributions are studied as a function of the transverse energy in the forward calorimeters (E

Research paper thumbnail of One-stage lingual augmented urethroplasty in repair of distal penile hypospadias

Objectives: To evaluate the outcome of augmentation of shallow urethral plate by lingual graft in... more Objectives: To evaluate the outcome of augmentation of shallow urethral plate by lingual graft in repair of distal penile hypospadias. Patients and methods: Between June 2008 and May 2011, the procedure was performed on 23 patients with mean age 2.3 years (range 1–3). All patients had distal penile hypospadias; 11 sub coronal and 12 coronal. The urethral plate was less than 8 mm in all patients and 3 of them had history of previous hypospadias surgery. All procedures were carried out under general anesthesia using 4× magnifying loupe. After penile degloving and dorsal incision of the urethral plate, the lingual graft was harvested and sutured to the edges of the incised urethral plate from the hypospadias opening to the tip of the penis. The neourethra was closed and an intervening flap was fixed over the neourethra as a barrier against fistula formation. Results: Success rate was 87% as 20/23 patients were cured without any permanent complication throughout the follow up period. None of patients suffered meatal stenosis or required regular urethral dilatation. Three patients developed urethrocutaneous fistula, of which two closed spontaneously and one required surgical repair 6 months later. Two patients had failed procedures and delayed re-intervention was performed due to complete loss of the graft in one of them and repair disruption following infection in the other. Two patients had post-operative pain in the graft harvesting site which disappeared within days. Conclusion: The one-stage lingual augmented urethral plate urethroplasty offers promising outcomes for repair of distal penile hypospadias with narrow urethral plate.

Research paper thumbnail of Neoadjuvant Hormonal Therapy Versus Radiotherapy Alone in Treatment of Locally Advanced Prostate Cancer

Introduction: Despite adequate local therapy for carcinoma of the prostate, significant proportio... more Introduction: Despite adequate local therapy for carcinoma of the prostate, significant proportion of patients developed a progressive or metastatic disease. Neoadjuvant hormonal therapy not only provides possible early systemic treatment for a subclinical disease, but may also help in improving local disease control by increasing the number of patients eligible for definitive local therapy (via down staging).

Research paper thumbnail of Relic neutralino density in scenarios with intermediate unification scale

New Journal of Physics, 2002

We analyse the relic neutralino density in supersymmetric models with an intermediate unification... more We analyse the relic neutralino density in supersymmetric models with an intermediate unification scale. In particular, we present concrete cosmological scenarios where the reheating temperature is as small as O(1 − 1000 MeV). When this temperature is associated to the decay of moduli fields producing neutralinos, we show that the relic abundance increases considerably with respect to the standard thermal production. Thus the neutralino becomes a good dark matter candidate with 0.

Research paper thumbnail of Study of the semileptonic decay D{sub s}{sup +}{yields}f{sub 0}(980)e{sup +}{nu} and implications for B{sub s}{sup 0}{yields}J/{psi}f{sub 0}

Physical review D: Particles and fields

Using e{sup +}e{sup -}{yields}D{sub s}{sup -}D{sub s}*{sup +} and D{sub s}*{sup -}D{sub s}{sup +}... more Using e{sup +}e{sup -}{yields}D{sub s}{sup -}D{sub s}*{sup +} and D{sub s}*{sup -}D{sub s}{sup +} interactions at 4170 MeV collected with the CLEO-c detector, we investigate the semileptonic decays D{sub s}{sup +}{yields}f{sub 0}(980)e{sup +}{nu} and D{sub s}{sup +}{yields}{phi}e{sup +}{nu}. By examining the decay rates as functions of the four-momentum transfer squared q{sup 2}, we measure the ratio [(dB/dq{sup 2})(D{sub s}{sup +}{yields}f{sub 0}(980)e{sup +}{nu})B(f{sub 0}{yields}{pi}{sup +}{pi}{sup -})]/[(dB/dq{sup 2})(D{sub s}{sup +}{yields}{phi}e{sup +}{nu})B({phi}{yields}K{sup +}K{sup -})] at q{sup 2} of zero to be (42{+-}11)%. This ratio has been predicted to equal the rate ratio [B(B{sub s}{yields}J/{psi}f{sub 0})B(f{sub 0}{yields}{pi}{sup +}{pi}{sup -})]/[B(B{sub s}{yields}J/{psi}{phi})B({phi}{yields}K{sup +}K{sup -})], thus indicating that the CP eigenstate J/{psi}f{sub 0} could be useful for measuring CP violation via B{sub s} mixing. Assuming a simple pole model for the ...

Research paper thumbnail of Study of di-pion transitions among Upsilon(3S), Upsilon(2S), and Upsilon(1S) states

Phys.Rev., 2007

We present measurements of decay matrix elements for hadronic transitions of the form Υ(nS) → Υ(m... more We present measurements of decay matrix elements for hadronic transitions of the form Υ(nS) → Υ(mS)ππ, where (n, m) = (3, 1), (2, 1), (3, 2). We reconstruct charged and neutral pion modes with the final state Upsilon decaying to either µ + µ − or e + e − . Dalitz plot distributions for the twelve decay modes are fit individually as well as jointly assuming isospin symmetry, thereby measuring the matrix elements of the decay amplitude. We observe and account for the anomaly previously noted in the di-pion invariant mass distribution for the Υ(3S) → Υ(1S)ππ transition and obtain good descriptions of the dynamics of the decay using the most general decay amplitude allowed by partial conservation of the axial-vector current (PCAC) considerations. The fits further indicate that the Υ(2S) → Υ(1S)ππ and Υ(3S) → Υ(2S)ππ transitions also show the presence of terms in the decay amplitude that were previously ignored, although at a relatively suppressed level.

Research paper thumbnail of CP violation versus flavour in supersymmetric theories

Research paper thumbnail of Observation of χcJ Radiative Decays to Light Vector Mesons

Physical Review Letters, 2008

Using a total of 2.74 ×10 7 decays of the ψ(2S) collected with the CLEO-c detector, we present a ... more Using a total of 2.74 ×10 7 decays of the ψ(2S) collected with the CLEO-c detector, we present a study of χ cJ → γV , where V = ρ 0 , ω, φ. The transitions χ c1 → γρ 0 and χ c1 → γω are observed with B(χ c1 → γρ 0 ) = (2.43 ± 0.19 ± 0.22) × 10 −4 and B(χ c1 → γω) = (8.3 ± 1.5 ± 1.2) × 10 −5 . In the χ c1 → γρ 0 transition, the final state meson is dominantly longitudinally polarized. Upper limits on the branching fractions of other χ cJ states to light vector mesons are presented.

Research paper thumbnail of Measurement of Prominent η-Decay Branching Fractions

Physical Review Letters, 2007

The decay ψ(2S) → ηJ/ψ is used to measure, for the first time, all prominent η-meson branching fr... more The decay ψ(2S) → ηJ/ψ is used to measure, for the first time, all prominent η-meson branching fractions with the same experiment in the same dataset, thereby providing a consistent treatment of systematics across branching fractions. We present results for η decays to γγ, π + π − π 0 , 3π 0 , π + π − γ, and e + e − γ, accounting for 99.9% of all η decays. The precisions for several of the branching fractions and their ratios are improved. Two channels, π + π − γ and e + e − γ, show results that differ at the level of three standard deviations from those previously determined.

Research paper thumbnail of Measurement of the Decay Constant fDs+ Using Ds+→l+ν

Physical Review Letters, 2007

Research paper thumbnail of Possible Supersymmetric Solution to the Discrepancy between B→ϕK_{S} and B→η^{′}K_{S} CP Asymmetries

Physical Review Letters, 2003

We present a possible supersymmetric solution to the discrepancy between the observed mixing CP a... more We present a possible supersymmetric solution to the discrepancy between the observed mixing CP asymmetries in B → φKS and B → η ′ KS. We show that due to the different parity in the final states of these processes, their supersymmetric contributions from the R-sector have an opposite sign, which naturally leads to S φK S = S η ′ K S . We also consider the proposed mechanisms to solve the puzzle of the observed large branching ratio of B → η ′ K and their impact on S η ′ K S .

Research paper thumbnail of Measurement of B(Ds+→l+ν) and the decay constant fDs+ from 600 pb-1 of e+e- annihilation data near 4170 MeV

Research paper thumbnail of Absolute branching fraction measurements for exclusive Ds semileptonic decays

Research paper thumbnail of EDM constraints in supersymmetric theories

Nuclear Physics B, 2001

We systematically analyze constraints on supersymmetric theories imposed by the experimental boun... more We systematically analyze constraints on supersymmetric theories imposed by the experimental bounds on the electron, neutron, and mercury electric dipole moments. We critically reappraise the known mechanisms to suppress the EDMs and conclude that only the scenarios with approximate CP-symmetry or flavour-off-diagonal CP violation remain attractive after the addition of the mercury EDM constraint.

Research paper thumbnail of Yield stability of faba bean lines under diverse broomrape prone production environments

Field Crops Research, 2011

Faba bean (Vicia faba L.) is one of the important pulse crops grown in many parts of the world. I... more Faba bean (Vicia faba L.) is one of the important pulse crops grown in many parts of the world. Its production and productivity are affected by different biotic and abiotic stresses. Broomrape (Orobanche and Phelipanche spp.) causes yield losses of 7-80% in major faba bean growing countries mainly in the Mediterranean Basin and Nile Valley countries. Host plant resistance is found to be the most effective and economic method of broomrape control. Efforts made at the International Center for Agriculture Research in the Dry Areas over many years to develop advanced breeding lines with acceptable resistance and tolerance levels to broomrape have resulted in the identification of several useful breeding lines. These lines were shared with National Agricultural Research Systems (Egypt, Sudan, Tunisia and Portugal) as part of the Faba Bean Orobanche International Nursery, in order to test their stability across three seasons (2005, 2006 and 2007). The results showed that Orobanche plant number, dry weight, Orobanche index, flowering date, maturing date and grain yield were significantly different among lines and locations. AMMI analysis showed that some lines derived from hybrid bulk populations "HBP/DS0/2000" and "HBP/ES0/2000" showed acceptable levels of yield stability in the presence of Orobanche infections across all environments compared with susceptible check. In highly infested soils, the tolerant and resistant lines gave acceptable levels of yield compared with the susceptible check. However, the yield potential of resistant and tolerant lines in non-infested soils was lower than the highly susceptible check.

Research paper thumbnail of DFOFARAGAB

Research paper thumbnail of Group photo

Research paper thumbnail of Observation of the diphoton decay of the Higgs boson and measurement of its properties

Eur.Phys.J., 2014

Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of ... more Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and 2012 LHC running periods. The data samples correspond to integrated luminosities of 5.1[Formula: see text]at [Formula: see text] and 19.7[Formula: see text]at 8[Formula: see text] . A clear signal is observed in the diphoton channel at a mass close to 125[Formula: see text] with a local significance of [Formula: see text], where a significance of [Formula: see text] is expected for the standard model Higgs boson. The mass is measured to be [Formula: see text] , and the best-fit signal strength relative to the standard model prediction is [Formula: see text][Formula: see text][Formula: see text]. Additional measurements include the signal strength modifiers associated with different production mechanisms, and hypothesis tests between spin-0 and spin-2 models.

Research paper thumbnail of Measurement of the Z/γ*+b-jet cross section in pp collisions at √s = 7 TeV

Journal of High Energy Physics, 2012

Measurement of the Z/γ * + b-jet cross section in pp collisions at √ s = 7 TeV

Research paper thumbnail of Search for third-generation leptoquarks and scalar bottom quarks in pp collisions at root s=7 TeV

Journal of High Energy Physics, 2012

Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in ... more Results are presented from a search for third-generation leptoquarks and scalar bottom quarks in a sample of proton-proton collisions at sqrt {s}= 7TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.7 fb-1. A scenario where the new particles are pair produced and each decays to ab quark plus a tau neutrino or neutralino is considered. The number of observed events is found to be in agreement with the standard model prediction. Upper limits are set at 95% confidence level on the ...

Research paper thumbnail of Studies of dijet transverse momentum balance and pseudorapidity distributions in pPb collisions at root s(NN)=5.02 TeV

European Physical Journal C, 2014

Dijet production has been measured in pPb collisions at a nucleon-nucleon centre-of-mass energy o... more Dijet production has been measured in pPb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. A data sample corresponding to an integrated luminosity of 35 nb −1 was collected using the Compact Muon Solenoid detector at the Large Hadron Collider. The dijet transverse momentum balance, azimuthal angle correlations, and pseudorapidity distributions are studied as a function of the transverse energy in the forward calorimeters (E